Search

Copyright of China Condiment is the property of China Condiment and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Using acetate as the precursor, different proportions of Cu/Zn catalysts were prepared by hydrothermal method, and the performance of CO2 hydrogenation to methanol was evaluated without H2 pretreatment. The effects of different Cu/Zn ratios on the crystalline phase structure, surface properties and valence state of the catalyst were investigated by XRD, TG-DSC, H2-TPR, CO2 temperature-programmed desorption and XPS, and its active sites were studied. The results show that the activity of the Cu/Zn catalyst prepared with acetate as the precursor is evaluated without pretreatment, and the H2 in the reaction gas (H2 : CO2 =3 : 1) will reduce the Cu2+ of the Cu/Zn catalyst to Cu° to form a new Cu0-ZnO interface, which makes the Cu/Zn45 achieve a spatiotemporal yield of 7.97 mmol/(g· h) at 3 MPa and 240 °C. [ABSTRACT FROM AUTHOR]

In the wake of rapid industrial development, the ever-increasing emissions of carbon dioxide (CO2) have given rise to environmental concerns, including climate change. Harnessing CO2, an abundant, non-toxic, and costeffective C1 resource, through chemical catalysis to produce high-value-added chemicals presents a viable solution for the sustainable utilization of CO2 resources. This paper employs a first-person perspective and a personification approach to introduce the adsorption and activation mechanisms of CO2 molecules by several typical catalysts. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Introduction] Carbon dioxide capture, utilization and storage is an important measure to achieve the goal of net zero greenhouse gas emission. The synthesis of methanol by carbon dioxide hydrogenation is one of the effective ways to use carbon, which can not only convert CO2 into methanol, an valuable fuel and chemical product, but also combine with producing hydrogen by electrolytic water, making methanol become the storage carrier of hydrogen. [Method] The methanol producing process by carbon dioxide hydrogenation was modelled by simulation software Aspen Plus. For the methanol production scale of 300,000 t/a, the hydrogen producing by water electrolysis was considered as the hydrogen source, and the influence of temperature, pressure and CO2/H2 feed ratio on methanol yield was analyzed in detail. [Result] The simulation results show the methanol yield is the highest when the synthesis temperature is around 250 °C and the CO2/H2 feed ratio is 7.33. Considering the direct combination with water electrolysis process, the synthesis pressure at around 5 MPa is reasonable. The water content of hydrogen has a certain effect on the methanol yield. The methanol yield only reduces 0.1 percent with the water content increase 100 kg/h in the raw H2. [Conclusion] The simulation determined the selection basis of key process parameters of methanol synthesis system by carbon dioxide hydrogenation. In addition, the feasibility of directly combining H2 obtained from water electrolysis with methanol synthesis process without drying and compression treatment is proved. In conclusion, hydrogen production from renewable sources combined with methanol synthesis by carbon dioxide hydrogenation is a technology with application prospect.

[Introduction] This paper aims to explore the development status, application cases, and economic evaluation of direct air capture (DAC) technology in the context of carbon neutrality, thus providing references for achieving carbon emission reduction targets in China. [Method] This paper reviewed the working principles, types, and application cases of DAC technology and analyzed its development status both at home and abroad. By comparing cost data from different studies, it assessed the economy of DAC technology and discussed current challenges and potential solutions. [Result] The study finds that DAC technology effectively captures CO2 from the air and offers advantages such as flexibility in deployment and compatibility with renewable energy. However, its commercialization is still constrained by high costs, high energy consumption, and technical challenges related to large-scale deployment. Case analysis at home and abroad reveal the urgent need to address the efficiency and cost issues in practical applications, while also showing potential for optimization through technological improvements and policy support. [Conclusion] Despite the existing challenges, DAC technology remains a potential reserve technology for achieving carbon neutrality goals, especially for countries facing severe carbon reduction pressures like China. Research efforts should focus on developing more efficient and low-cost absorbents and adsorbents, improving system design, reducing energy consumption, and exploring combination with renewable energy sources. Government policy support and broad social acceptance are also key factors for the commercialization of DAC technology. These measures can drive the development and application of DAC technology, contributing to both carbon emission reduction and environmental protection goals.

Laboratory experiments, numerical simulations and fracturing technology were combined to address the problems in shale oil recovery by CO2 injection. The laboratory experiments were conducted to investigate the displacement mechanisms of shale oil extraction by CO2 injection, and the influences of CO2 pre-pad on shale mechanical properties. Numerical simulations were performed about influences of CO2 pre-pad fracturing and puff-n-huff for energy replenishment on the recovery efficiency. The findings obtained were applied to the field tests of CO2 pre-pad fracturing and single well puff-n-huff. The results show that the efficiency of CO2 puff-n-huff is affected by micro- and nano-scale effect, kerogen, adsorbed oil and so on, and a longer soaking time in a reasonable range leads to a higher exploitation degree of shale oil. In the “injection + soaking” stage, the exploitation degree of heavy hydrocarbons is enhanced by CO2 through its effects of solubility-diffusion and mass-transfer. In the “huff” stage, crude oil in large pores is displaced by CO2 to surrounding larger pores or bedding fractures and finally flows to the production well. The injection of CO2 pre-pad is conducive to keeping the rock brittle and reducing the fracture breakdown pressure, and the CO2 is liable to filter along the bedding surface, thereby creating a more complex fracture. Increasing the volume of CO2 pre-pad can improve the energizing effect, and enhance the replenishment of formation energy. Moreover, the oil recovery is more enhanced by CO2 huff-n-puff with the lower shale matrix permeability, the lower formation pressure, and the larger heavy hydrocarbon content. The field tests demonstrate a good performance with the pressure maintained well after CO2 pre-pad fracturing, the formation energy replenished effectively after CO2 huff-n-puff in a single well, and the well productivity improved.

[Introduction] CO2 catalytic hydrogenation for fuel synthesis is an economically feasible and large-scale implementable technology for CO2 utilization, which can solve the problems of environment and resource shortage, and has gained wide attention in recent years. In this work, a microchannel reactor for CO2 catalytic hydrogenation to synthesize hydrocarbon fuels is developed. [Method] Based on the design concept of thermodynamic calculation, catalyst preparation, reactor design, structure optimization and performance testing, an anlysis was carried out. [Result] The thermodynamic analysis shows that hydrocarbon fuels can be produced from CO2 catalytic hydrogenation. Six iron-based catalysts are developed to improve the reaction rate of hydrocarbon fuel synthesis. Based on the computational fluid dynamics (CFD) simulation, the structure of the microchannel reactor is designed and optimized. The microchannel reactor has the advantages of simple-compact structure and strong heat-mass transfer capability. The experimental results show that the Zn-Fe catalyst exhibits the best performance of CO2 catalytic hydrogenation for the synthesis of low-carbon olefins. CO2 conversion and low-carbon olefins selectivity are 32% and 44% respectively. [Conclusion] The microchannel reactor designed in this work has the dual functions of CO2 utilization for hydrocarbon fuel synthesis, which is of great significance to China's response to climate change, the realization of the dual-carbon target and the development of hydrocarbon fuel industry.

In 2020, the Ministry of Agriculture and Rural Affairs initiated the implementation of the "Five Major Actions" for promoting green and healthy aquaculture technologies, aiming to utilize cutting- edge technologies to guide aquaculture activities. In the new recirculating aquaculture system, with the increase of aquaculture production, the effect of carbon dioxide on fish has been concerned. At present, the circulation of carbon dioxide in recirculating aquaculture systems lacks systematic arrangement, and the recirculating aquaculture systems has the necessary treatment of carbon dioxide and the treatment method needs to be improved. Therefore, this study summarizes the current development trend and main innovative achievements by summarizing the domestic and foreign literature. Specifically, it includes :gradually establishing awareness of carbon dioxide sources and balance systems; exploring the relationship between carbon dioxide and alkalinity, pH, carbon dioxide partial pressure, and the need to further explore the synergistic effect of multiple parameters in the day and night; summarizing multiple diseases induced by carbon dioxide, focusing on the problems of hypercapnia and renal calcification caused by carbon dioxide, reducing potential stress caused by carbon dioxide accumulation through physical, chemical and biological regulation measures, thereby mitigating the harm of carbon dioxide to fish. it is necessary to further study the effects of long-term exposure on fish growth and health in the future. By adding chemical reagents, improving aeration methods, and screening high-quality treatment organisms to reduce the content of carbon dioxide in the recirculating aquaculture system, it is necessary to design new reactors to improve the fixation efficiency. This study provides solutions and theoretical basis for effectively removing accumulated carbon dioxide in recirculating aquaculture. [ABSTRACT FROM AUTHOR]

Objective The aim is to solve the problems of high regeneration energy consumption and high economic cost in the capture of carbon dioxide(CO2) by traditional absorbents, and to develop new phase change absorbents. Methods This paper provided a comparative study of the performance of four phase change absorbent systems: DETA-1-propanol, MMEA-DEG, DEEA-MEA, and DEEA-AEEA. Using monoethanolamine (MEA) with a traditional absorbent mass fraction of 30% as a reference standard, experiments were conducted to study absorption, desorption, foaming, corrosion, cyclic absorption-desorption, as well as estimated regeneration energy consumption and costs. Results The DETA-1-propanol system had a rich phase volume accounting for 66% of the total volume, with a maximum absorption capacity of 3.34 mol/kg, representing a 54.6% improvement compared to 30% MEA absorbents. The solvent cost was 11 500 yuan/t, which increased by 35.5% compared to 30% MEA absorbents. The regeneration enthalpy was 0.28 GJ/t CO2, and the regeneration latent heat was 1.1 GJ/t CO2. Compared with MEA absorbent, it reduced by 73.3% and 12.0%, respectively. Conclusions The DETA-1-propanol absorbent system exhibits higher absorption and desorption performance, high cycling stability, as well as lower regeneration energy consumption and solvent cost. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Engineering for Thermal Energy & Power / Reneng Dongli Gongcheng is the property of Journal of Engineering for Thermal Energy & Power and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Catalytic hydrogenation of carbon dioxide (CO2) to higher alcohols is one of the important ways to realize the high value utilization of CO2 and mitigate the greenhouse effect. The research progress on catalytic hydrogenation of CO2 to higher alcohols in recent years was reviewed. Firstly, the favorable reaction conditions and catalyst requirements for catalytic hydrogenation of CO2 to higher alcohols were analyzed from the thermodynamic point of view. Then the researches of different types of catalysts (precious metal based, copper based, cobalt and molybdenum based catalysts) applicable to the field were introduced. Finally, based on the key intermediates and main reaction pathways, the synthesis mechanisms of catalytic hydrogenation of CO2 to higher alcohols were summarized. Through summary and analysis, the main challenges in the research of catalytic hydrogenation of CO2 to higher alcohols were pointed out, and the future research direction in the field was prospected. [ABSTRACT FROM AUTHOR]

Copyright of Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of China Medical University is the property of Journal of China Medical University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Biomass hydrothermal conversion has garnered significant interest among researchers due to its broad adaptability to raw materials, cost-effectiveness, and high conversion efficiency. Utilizing CO2 as the filling gas for hydrothermal reactions not only contributes to reducing atmospheric carbon emissions but also enhances the efficiency of biomass conversion. Despite these advantages, the mechanisms for hydrothermal conversion of biomass in a CO2 atmosphere remain poorly understood, particularly the impact of inherent inorganic constituents under such conditions. This study employed corn stalk as biomass feedstock, which underwent a pre-treatment process involving rinsing deionized water, hydrochloric acid, and acetic acid. The influence of different solvents on the organic and inorganic compositions of corn stalk was investigated by means of elemental analysis, industrial analysis, three component (hemicellulose, cellulose, and lignin) analysis and X-ray Fluorescence Spectrometer (XRF). Subsequent hydrothermal experiments were carried out using the biomass samples before and after the washing pretreatment under a CO2 atmosphere (3.7 MPa, 270 ℃). The research examined the solubility of CO2 in the hydrothermal liquid and the characteristics of the hydrothermal products from various feedstocks to determine how changes in the organic/inorganic compositions of corn stalk due to the pretreatment affect the CO2 hydrothermal process. The results revealed that water washing pretreatment effectively removed inorganic elements from corn stalk, while it had lessimpact on the organic components. Acetic acid washing pretreatment demonstrated a robust removal capability, achieving an elimination rate exceeding 95% for major inorganic elements in corn stalk, such as potassium (K), calcium (Ca), and chlorine (Cl), etc. However, the influence of acetic acid washing on the organic components remained marginal; the removal rates for cellulose, hemicellulose, and lignin were all below 10% following acetic acid treatment. In contrast, hydrochloric acid washing not only efficiently removed inorganic elements but also significantly affected the organic components in corn stalk. In hydrothermal experiments, the washing pretreatment increased the solubility of CO2 in the liquid phase by extracting inherent inorganic matter from corn stalk, which significantly enhanced the conversion rates of hemicellulose and cellulose. However, the increased solubility of CO2 did not significantly promote the hydrolysis of lignin. On the contrary, the absence of inorganic components in the washed samples restricted the cracking of lignin, resulting in a decreased conversion rate during hydrothermal processing. Thus, the washing pretreatment, particularly using acetic acid, not only facilitated the selective hydrolysis of hemicellulose and cellulose but also inhibited the further decomposition of their hydrolysis products, thereby effectively increasing the yields of alcohols and aldehydes. The concentration of aldehydes (e.g. furfural and 5- hydroxymethylfurfural), which are the representative hydrolysis products of cellulose and hemicellulose, in the hydrothermal liquid products demonstrated a notable increase, rising from 14.31% for untreated corn stalk to between 25.89% and 39.45% for the washed corn stalk. Furthermore, the lignin content in the hydrothermal char significantly augmented following the washing pretreatment, enhancing its potential for subsequent utilization, notably in gasification processes aimed at producing hydrogen-rich syngas. This study holds substantial importance for elucidating the hydrothermal conversion mechanisms under a CO2 atmosphere and advancing the high-value conversion of biomass through hydrothermal processes. [ABSTRACT FROM AUTHOR]

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

As the second largest carbon emitter in China, iron and steel enterprises have great potential for carbon emission reduction. In order to facilitate the supervision and control of carbon emissions by relevant departments, carbon emission prediction research is carried out. Taking a steelmaking plant as the research object, firstly, the carbon dioxide emissions in the steelmaking process were analyzed, and 10 energy substances that caused carbon emissions were determined. The basic energy data of the steelmaking plant from 2001 to 2023 were collected, and the carbon emissions were calculated from the basic energy data according to the carbon emission accounting method. Secondly, based on the long short-term memory network to predict the carbon emissions in the next 7 years, the training error and test error were close to 0.01, and the actual error was 1323 307.46 tons of carbon dioxide. Then, the Mann-Kendall trend test was used to evaluate the overall carbon emission trend of the steelmaking plant. Finally, some reasonable suggestions were put forward for steelmaking plants in order to actively respond to the goal of low-carbon environmental protection. [ABSTRACT FROM AUTHOR]

In order to provide a pathway scenario for the contribution of flotation in the context of carbon neutral targets, starting from the phenomenon of CO2 optimization of flotation indexes, the studies on the direct participation of CO2 in flotation are elaborated through the change of flotation three-phase system; and the studies on the indirect participation of CO2 in flotation are reviewed from the point of view of the participation of CO2 capture-converted chemical reagents in flotation as flotation inhibitors and capture agents. On the basis of summarizing the previous studies on the direct participation of CO2 in flotation, it is pointed out that the direct participation of CO2 in flotation has limitations in space and processing objects under the current carbon neutral target. Combined with the importance of the current flotation chemicals system for flotation, the advantages of indirect CO2 participation in flotation are pointed out. On the one hand, it plays the role of optimizing and regulating the flotation index;on the other hand, it promotes the industry chain of carbon dioxide capture and conversion through the feedback of flotation, thus accelerating the rate of carbon dioxide capture and conversion, and realizing a win-win situation under the background of the goal of carbon neutrality. Therefore, it is proposed to vigorously promote the utilization of chemical products after carbon dioxide capture and conversion in flotation, which will be a new path for flotation to contribute to the carbon neutrality goal. [ABSTRACT FROM AUTHOR]

This article reviews the preparation of cyclic carbonates from alkylene oxides and CO2 catalyzed by metalloporphyrin polymers. It is found that metalloporphyrin-based porous polymers have high specific surface area, central metal of the porphyrin ring and nucleophilicity in small molecule polymerized monomers, which are the key points for efficiently catalyzing the cycloaddition reaction of epoxides and CO2 under mild conditions. However, currently synthesized metalloporphyrin polymers have some problems, such as easy pore size, unstable structure, and difficulty in adapting to large-sized epoxides. In the future, we should focus on designing and preparing dual-active site metalloporphyrin-based porous polymers with small steric hindrance, stable performance, and a large number of Lewis acid-base highly active centers, which is the direction we need to research in the future. [ABSTRACT FROM AUTHOR]

In order to study the recycle of CO2 in the process of coal clean and efficient conversion, Xiwan coal with the particle size of 0 μm to 300 μm was continuously run in a pyrolysis-gasification industrial test device with a processing capacity of 36 t/d (referred to as "industrial test facility"). The material and heat balance, operation and product properties of industrial test device with CO2 were investigated. The results show that under the conditions of pyrolysis temperature of 600 °C, gasification temperature of 1000 °C and reaction pressure of 0.8 MPa to 1.0 MPa, after CO2 participates in the pyrolysis-gasification process, the industrial test device runs stably, and the steam consumption per ton of coal decreases by 5.38%, and the content of effective gas (CO + H2) in syngas increases from 74.74% to 79.63%, and CO content increases by 10.43%, and H2 content decreases by 5.54%, and syngas calorific value, carbon conversion rate and energy conversion efficiency increase. The yield of tar increases from 15.91% to 16.25%, the density decreases from 1.06 kg/m³ to 1.02 kg/m³, the kinematic viscosity decreases from 3.42 mm²/s to 2.70 mm²/s, the mass fraction of sulfur decreases from 0.20% to 0.15%, and the corresponding temperature of the same quality of tar fraction decreases by 10 °C to 30 °C. The mass fraction of aliphatic hydrocarbon in tar increases by 7.53%, the mass fraction of aromatic hydrocarbon decreases by 5.47%, and the mass fraction of other compounds increases by 15.98%. [ABSTRACT FROM AUTHOR]

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The production and application of biodegradable polycarbonate have been significantly facilitated by the scale production of dimethyl carbonate which is the downstream of carbon dioxide. Hence, the progress in current research of novel biodegradable aliphatic poly(butylene carbonate) (PBC) modification has been reviewed. The mechanism of monomer structure (i. e. linear aliphatic monomer, cyclic aliphatic monomer, and aromatic monomer) and blending compatibility effect on thermal properties, crystallization, and tensile properties of PBC were analyzed. In addition, the application and development were also prospected according to the structure-properties relationship of PBC-based copolycarbonate and PBC-based blends. [ABSTRACT FROM AUTHOR]

Copyright of Southern Energy Construction is the property of Southern Energy Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Using thermoplastic polyurethane elastomer (TPU) as matrix, nano-silica (SiO2) as filler and supercritical carbon dioxide（scCO2） as foaming agent, TPU/SiO2 composite foaming materials were prepared by simple physical blending and scCO2 foaming equipment. The effects of different SiO2 contents on the composite foaming materials were investigated.The results show that the nano-SiO2 particles have good dispersion in the TPU matrix, and the prepared TPU/SiO2 composite foaming material is uniformly mixed.The addition of SiO2 particles regulates the foaming behavior of the composites, making the cell size stable and the distribution range decreased from 60～180 μm to 20～40 μm.The SiO2 particles effectively improved the crystallinity of the TPU matrix, so that the rebound increased from 40 to 42,and the hardness increased from 45.3 Shore C to 54.38 Shore C; the tensile strength increased from 1.18 MPa to 4.19 MPa, and the elongation at break increased from 237.25% to 460.03%. [ABSTRACT FROM AUTHOR]

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Clinical Nursing in Practice is the property of Journal of Clinical Nursing in Practice (Editorial Board, Shanghai Jiao Tong University Press) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Refrigeration is the property of Journal of Refrigeration Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

BACKGROUND: Collagen is a biomedical material with good biocompatibility, low toxicity, low immunoactivity, and high cellular affinity. However, the defects such as hydrophilicity and poor thermal stability are the key technical problems that need to be solved urgently in biomedical, tissue engineering, and other applications. OBJECTIVE: To elaborate on the preparation method, characterization, and application progress of acylated collagen. METHODS: PubMed, X-mol, and CNKI databases were used to search the literature on acylated collagen preparation methods, characterization, and application. The search time was from January 1992 to May 2023. The English search terms were “acylated collagen, modified collagen, water-soluble collagen, acetic anhydride”. Chinese search terms were “acylated collagen, modified collagen, water-soluble collagen”. After an initial screening of all articles according to inclusion and exclusion criteria, 53 articles with high relevance were retained for review. RESULTS AND CONCLUSION: (1) The preparation of acylated collagen is mainly obtained by the acylation reaction of acid anhydride, and the reaction sites are mainly ε-amino and N-terminus-amino of collagen, and the reaction environment of acylation reaction needs to be carried out in an alkaline environment. (2) Succinic anhydride is the preferred reactant of acylated collagen. Carbonic anhydride, citric anhydride, and bifunctional modifiers with acylation ability have been excavated in recent years to meet various requirements, but it is still limited to laboratory preparation; complex preparation process is difficult to industrialize, and follow-up research is needed to continuously improve. (3) The characterization methods of acylated collagen are similar to those of collagen, but there is still a lack of standards for the water-soluble characterization of acylated collagen. (4) In recent years, acylated collagen has been gradually used in the preparation of lenses, hydrogels, and dressings, as well as cosmetic raw materials. However, there is still little research on the application of acylated collagen, and there is a lack of complete in vivo experiments to verify the practicality of acylated collagen. [ABSTRACT FROM AUTHOR]

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Phosphoric acid is commonly used to react with carbonates to generate carbon dioxide for determining the carbon and oxygen isotopes of carbonates by using online reaction device, for example, GasBench coupled to an isotope ratio mass spectrometer (IRMS). During the measurement, oxygen isotope fractionation will arise due to various factors, which can result differences between the measured oxygen isotope values and the actual ones. In this study, a series of carbonate standard materials (international standard materials IAEA-603, NBS18, and national standard materials GBW04416 and GBW04405) and modern marine planktonic foraminiferal samples were determined to explore the contribution of acid fractionation on the oxygen isotope values under different conditions. The effects of acid fractionation on the oxygen isotope values for each standard material, and the underlying mechanism were investigated and discussed. The results showed that: 1) The acid fractionation effect is mainly caused by the exchange of oxygen isotopes between the sample CO2 gas and the evaporated gas phase water in the headspace bottle (at high temperatures) or by the liquid water in the acid (at low temperatures); 2) The acid fractionation coefficients of oxygen isotope in carbonate reference materials with different characteristics show significant differences and are related to their oxygen isotope compositions; 3) The degree of deviation of oxygen isotopes is related to the factors such as reaction temperature, sample quantity, water content of phosphoric acid, and the difference between the oxygen isotope composition of liquid and gaseous water in the acid and the oxygen isotope composition of the samples; 4) The acid fractionation effect on oxygen isotopes is significantly correlated with signal intensity. It is recommended to effectively correct the oxygen isotope fractionation of acid by accurately weighing reference materials and samples, following the principle of peak intensity matching and adopting linear correction method for determination of oxygen isotopes in carbonates. Besides, a lower reaction temperature (25 ℃) generates slighter degree of oxygen isotope fractionation. This study provides a useful reference for the accurate determination of carbon and oxygen isotope composition in carbonates, and is of great significance for improving analysis accuracy. [ABSTRACT FROM AUTHOR]

The research progress of metal-organic framework (MOFs) materials in photocatalytic carbon dioxide (CO2) cycloaddition reaction in recent years was reviewed ・ The mechanism of cycloaddition reaction of CO2 under photocatalysis was analyzed, and four modification strategies of MOFs were introduced, including structural defects of MOFs, MOFs with active catalytic metal s让es, heterojunctions with semiconductor materials, and co-catalyst functionalization of MOFs. Based on the current research status of CO2 cycloaddition reaction, the prospects and challenges of MOFs and its composites in the field of photocatalysis are presented. [ABSTRACT FROM AUTHOR]

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Petroleum Refinery Engineering is the property of Petroleum Refinery Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Energy Chemical Industry is the property of Energy Chemical Industry Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food & Machinery is the property of Food & Machinery Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Ternary deep eutectic solvents (DES) comprising choline chloride (ChCl), glycerol (Gly) and ethanolamine (MEA) with different molar ratios were prepared. The CO2 absorption ability of the ternary DES was investigated at room temperature and under atmospheric pressure. Among four ternary DES samples prepared with different molar ratios, a ChCl-Gly-MEA (1:1:10) ternary DES was found to absorb the most CO2 at a capacity of 0.18 g CO2 (DES per gram) at 298 K and 101.3 kPa. The experimental results showed that the CO2 absorption capacity of ChCl-Gly-MEA (1:1:10) ternary DES increased with an increase in gas flow rate and a decrease in water content. The gas flow rate improved the mass transfer efficiency of CO2 in the ternary DES system, and shortened the time required for CO2 absorption to reach equilibrium. However, the addition of water could weaken the hydrogen bonding interaction among the three components in the DES system. Results from Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy indicated that CO2 interacted with the amino groups in DES to form carbamates. The absorption of CO2 by ChCl-Gly-MEA underwent both physical and chemical absorption, and the chemical absorption was significantly enhanced by the addition of MEA. A recovery experiment showed that no obvious loss in CO2 absorption was detected after five absorption/desorption cycles with an absorption rate of 97.3% being retained. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Refrigeration is the property of Journal of Refrigeration Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

By enlarging the H-type reactor, formic acid is produced by electrocatalytic reduction of carbon dioxide using indium metal sheet and tin metal sheet electrodes with an area of more than 100 cm2 ・ The selectivity of carbon dioxide reduction reaction products, electrolysis ability and other aspects were studied, and the optimization method of electrocatalytic formic acid production in large-scale metal electrode reactor was obtained・ The results show that the optimal conditions for the reaction are the air inlet flow rate of 40 mL/min, the current density of 一 3.0 to 一4.5 mA/cm2, and the neutral electrolyte. [ABSTRACT FROM AUTHOR]

Copyright of Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Machine Tool & Hydraulics is the property of Guangzhou Mechanical Engineering Research Institute (GMERI) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Steel Pipe is the property of Steel Pipe Magazine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Molecular dynamics method was used to establish composite wall/inorganic nanopores of three pore sizes, three shale oil systems, five CO2-cosolvent systems, and pure CO2 system. The process of CO2-cosolvent displacement of crude oil in shale nanopores and carbon storage was simulated and the influencing factors of displacement and storage were analyzed. It is shown that the attraction of the quartz wall to shale oil increases with the degree of hydroxylation. The higher the degree of quartz hydroxylation, the more difficult it is to extract the polar components of shale oil. Nanopore size also has a great impact on shale oil displacement efficiency. The larger the pore size, the higher the shale oil displacement efficiency. The closer the cosolvent molecules are to the polarity of the shale oil, the higher the mutual solubility of CO2 and shale oil. The more the non-polar components of shale oil, the lower the mutual solubility of CO2 and shale oil with highly polar cosolvent. Ethyl acetate is more effective in stripping relatively high polar shale oil, while dimethyl ether is more effective in stripping relatively low polar shale oil. Kerogen is highly adsorptive, especially to CO2. The CO2 inside the kerogen is not easy to diffuse and leak, thus allowing for a stable carbon storage. The highest CO2 storage rate is observed when dimethyl ether is used as a cosolvent, and the best storage stability is observed when ethyl acetate is used as a cosolvent.

Copyright of Journal of China University of Petroleum is the property of China University of Petroleum and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of the Chinese Society of Rare Earths is the property of Editorial Department of Journal of the Chinese Society of Rare Earths and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Isothermal adsorption experiments are widely used in the field of geology as a research method to investigate the adsorption behavior between gases in coal seams. Taking the coal reservoirs of No. 13 Coal from Liuzhuang Mine as the research object, N2 and CO2 gas adsorption experiments were carried, and the optimal adsorption model for gas adsorption in low permeability coal was selected on the basis of a comprehensive analysis of the squared regression coefficients of the fit R², the residual sum of squares of the calculated and experimental values of the model v, and the relative errors s . The results show that the models fitting degree of N2 adsorption in low permeability coal from high to low: optimized L model > optimized D-A model > optimized D-R model > D-A model > L model > D-R model > F model. The models fitting degree of CO2 adsorption in low permeability coal from high to low: optimized L model > optimized D-A model = optimized D-R model > D-A model > L model > D-R model > F model. The experimental results can provide geological basis for gas adsorption and CO2 sequestration in low-permeability coal seams. [ABSTRACT FROM AUTHOR]

Copyright of Low-Carbon Chemistry & Chemical Engineering is the property of Low-Carbon Chemistry & Chemical Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)