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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.)

This paper mainly reviews the research status of PV technology in the separation of organic mixtures in recent years. The main research achievements of PV technology in the separation of polar/non-polar mixture, aromatic/alkane, isomeric, and removal of sulfide in gasoline are described in detail. At the same time, we look forward to the development direction of PV technology in the field of separating organic mixtures and provide a reference for the subsequent research on the separation of organic mixtures by PV technology. [ABSTRACT FROM AUTHOR]

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management 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 Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute 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.)

Among the family of two-dimensional materials, the emerging MXenes materials have gained widespread popularity due to the unique properties such as ultra-thin structure, good electrical conductivity, tunable surface functionality, and excellent photothermal conversion. Improvement of a range of desalination materials with MXenes has led to the widespread application in the field of desalination. The aim of this paper is to review the recent developments in a range of desalination strategies using MXenes, and to discuss in detail the application and development of MXenes materials in the fields of capacitive deionization, solar interfacial evaporation, and pervaporation desalination. The excellent desalination capabilities of MXenes could provide a solution to the current growing freshwater crisis.

Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute 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 feasibility and process advantages of pervaporation process for the concentration and reduction of desulfurization wastewater were discussed ・ The results showed that the membrane permeation flux can reach 13. 8 L/(m2 ・ h), and the membrane permeation flux reaches 7.4 L/(m2 ・ h) when the water recovery rate exceeds 70% ・ The water quality of pervaporation effluent is stable, and the effluent conductivity is < 50 |mS/cm, COD < 20 mg/L・ At the same time, the inhibition effect of scale inhibitors on membrane fouling was investigated・ The use of scale inhibitors before 50% water recovery increased the average membrane permeation flux by 22・ 5%. [ABSTRACT FROM AUTHOR]

In order to analyze the aroma characteristics and composition of tolu balsam, tolu balsam extracts prepared with five different concentrations of ethanol were separated by pervaporation. The retentate and permeate were evaluated by sensory evaluation and their volatile and semi volatile components were analyzed by solid-phase supported liquid-liquid extraction coupled with gas chromatography-mass spectrometry (SLE-GC-MS). Chemometrics was adopted to explore the difference in target components and the correlation between sensory properties and components. The results showed that the major aroma characteristics of both retentate and permeate were ointment-like and sweet, followed by resin-like, fruity, fresh, and spicy aromas as well as weak creamy, floral, bean-like, and woody aroma notes. A total of 92 components were identified by GC-MS, with esters and alcohols being the predominant ones, accounting for more than 55% of the total, followed by acids, aldehydes, phenols, others and olefins, together with relatively low levels of ketones. Principal component analysis (PCA) and cluster heatmap analysis indicated that tolu balsam extracts obtained with low and medium ethanol concentrations were distinguished from that obtained with high ethanol concentration, and the contents of the identified compounds were overall higher in the former than in the latter. By orthogonal partial least squares discriminant analysis (OPLS-DA), 43 differential compounds were selected. Partial least square regression (PLSR) showed that the characteristic aroma substances of tolu balsam extracts had significant positive correlation with ointment-like, resin-like, fresh and spicy aromas, but had no significant correlation with sweet, fruity, creamy, floral, bean-like or woody aroma. The results of this study may provide a theoretical basis for research on the sensory quality and fine processing of tolu balsam.

First, polyacrylonitrile/polyvinyl pyrrolidone (PAN/PVP) fibrous membrane was prepared by electrospinning, and then porous polyacrylonitrile (PPAN) fibrous membrane was obtained by water impregnation. Fourier transform infrared (FTIR) spectra and thermogravimetric analysis (TGA) were used to explore the mechanism of fiber pore-forming, and X-ray photoelectron spectroscopy (XPS) was used to study the interaction between PAN and PVP molecules in the porous fibrous membrane. At the same time, the effects of mass ratio of PAN to PVP on the morphology, surface area, wettability, mechanical properties, and oil/water separation performance of fibrous membrane were investigated, and the optimal mass ratio was determined. Results showed that when m(PAN)/m(PVP) was 1∶2, PPAN fibrous membrane showed higher mechanical properties. The separation flux of the n-hexane/water mixture was (46 318 ± 3 879) L/(m2·h·bar) (1 bar=0.1 MPa), and the efficiency was (96.01 ± 0.38)%. It also realized the efficient separation of different kinds of oil/water mixtures. In addition, PPAN fibrous membrane showed excellent cyclic separation performance, and the flux loss rate was only 8.9% after ten cycles of separation. [ABSTRACT FROM AUTHOR]

This article reviews the application o£ pervaporation technology in high salinity wastewater treatment. The effects of wastewater composition, feed water temperature, osmotic vacuum, wastewater flow state and membrane materials, are mainly discussed・ Based on the previous work, the feasibility of applying pervaporation technology to the treatment of high salinity wastewater is discussed・ The pervaporation technology is expected to become one of the important technology choices in the zero discharge of wastewater. [ABSTRACT FROM AUTHOR]

Copyright of Shipin Kexue/ Food Science is the property of Food Science 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 Journal of Shanghai University of Engineering Science / Shanghai Gongcheng Jishu Daxue Xuebao is the property of Journal of Shanghai University of Engineering Science 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 Brewing is the property of China Brewing 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.)

A PDMS/PVDF pervaporation composite membrane was self-made via the coating method and used for separating volatile aromatic compounds from the waste liquid of lemon essential oil processing by pervaporation (PV). The PDMS/PVDF membrane was applied in the pervaporation separation of nerol, α-terpineol, and linalool, which are characteristic aroma components in lemon essential oil waste liquid. The results demonstrated that the PDMS/PVDF membrane had good separation selectivity for the three compounds, but the permeation flux was low. Addition of ethanol significantly affects the separation of aromatics. When the amount of ethanol added is 5% v/v, the permeation fluxes of nerol and linalool increase by 82.93% and 127.76% over those without ethanol. The permeation flux of α-terpineol first increased and then decreased slowly with the increase in ethanol concentration. In addition, the performance of the PDMS/PVDF membrane in separating volatile aroma components in actual lemon oil waste liquid was tested. When the experiment was conducted for 6 h, the types and content of volatile aromatic compounds in the lemon oil waste liquid were significantly reduced. The recovery rates of nerol, α-terpineol, and linalool were 92.50%, 93.37%, and 60.36% respectively. The results showed that the PDMS/PVDF membrane achieved better performance. Keywords: lemon oil processing waster liquid; volatile aromatic components; pervaporation; separation perfomance; synergistic effect of ethanol [ABSTRACT FROM AUTHOR]

Copyright of Journal of East China University of Science & Technology is the property of Journal of East China University of Science & Technology 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 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.)

Various pervaporation membrane techniques in ABE separation and their development status are reviewed. The pervaporation membranes involve two major categories such as polymer matrix membranes and mixed matrix membranes. The mixed matrix pervaporation membranes doped by MOF, zeolite and ILs and so on are mainly introduced.The doping preparation, processing parameters and influence factors are summarized. Finally, this review pointed out the bottleneck of ABE recovery via pervaporation and prospected the development direction of pervaporation membranes in the future. [ABSTRACT FROM AUTHOR]

This article reviews preparation of pervaporation membrane and their application in dehydration of organics, recovery of organics, organic/organic separations, and the latest research progress・ Because it has the advantages of simple operation? small footprint, and low capacity consumption? so pervaporation (PV) technology that be widely used for petroleum? chemical,medical? and food industries・ However,pervaporation technology also has disadvantages such as membrane pollution and short life. Therefore, the development of membrane materials with large flux，good separation performance and long life will be the focus of future research. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development 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 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.)

Copyright of Journal of East China University of Science & Technology is the property of Journal of East China University of Science & Technology 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 Geology & Recovery Efficiency is the property of Petroleum Geology & Recovery Efficiency 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.)

A series of poly (vinyl alcohol) (PVA)/hyperb ranched polyester (HBPE) crosslinked membranes were prepared by blending PVA and HBPE at different mass ratios, and their dissolution-diffusion mechanism and pervaporation properties were investigated. The results indicated that the water permeability coefficient of the crosslinked membranes increased at the elevated temperatures, and its variation trend was consistent with the water flux. The crosslinked membranes achieved a maximum water permeability coefficient of 71.952 g/m² ⋅ h at 55 °C. The water flux was found to increase with an increase of HBPE content, and a maximum water flux of 185.726 g/mm² ⋅ h was gained for the crosslinked membranes containing 40 wt% HBPE. [ABSTRACT FROM AUTHOR]

Two-dimensional covalent triazine framework material (2D-CTF) is a kind of covalent organic framework material with triazine ring structure consisting of C and N elements, which is considered to be a type of ideal membrane material due to its excellent structural stability and adjustable in-plane nanopore. In this study, few-layers 2D-CTF-1 nanomaterials were prepared using a micro-interface method based on the polymerization of 1,4-dicyanobenzene. The resulting few-layers 2D-CTF-1 nanosheets were used as building blocks to construct 2D-CTF-1 membrane via a layer-bylayer assembly method. The structure and morphology of the prepared 2D-CTF-1 nanosheets and membrane were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, transmission electron microscopy and scanning electron microscopy. The pure water flux under different pressures and the separation performances of 2D-CTF-1 membrane for small organic dye molecules were tested. The results show that 2D- CTF-1 membrane possesses high pure water flux(153.7 L/(m2·h)) (25 °C, 0.1 MPa), and the in-plane nanopores of 2D-CTF-1 are proposed as the main transport channels for water molecules. Besides, the 2D-CTF-1 membrane exhibits high flux (132.5 L/(m2·h)) (25 °C, 0.1 MPa) and high rejection rate (98.3%) for separation of organic dye (Congo red). The membrane still shows high flux and rejection after a long-term operation. Thus, 2D-CTF-1 is a promising 2D separation membrane material for high efficient molecular separation. [ABSTRACT FROM AUTHOR]

Starting from polymer membranes, inorganic membranes and organic-inorganic mixed matrix membranes, the progress of membrane materials for the separation of phenol-water and aniline-water systems by pervaporation technology in the past 20 years was reviewed. It was pointed out that the flux and separation factor of polymer membrane materials were low, and the trade-off effect was common, while the flux and separation factor of polyether copolyamide ( PEBA) were kept at a high level, hybridization and other modification methods could be used to improve the separation performance; inorganic membrane materials had the disadvantages of poor mechanical properties, difficult processing and high cost, and related research contents were less; organic-inorganic mixed matrix membranes could combine the advantages of polymer membranes and inorganic membranes. The trade-off effect of the polymer membranes was effectively solved, but the compatibility of the inorganic particles with the polymer was not good, so that the membranes was prone to defects and the separation factor was lowered. In the future, the matrix membranes will become a hot research topic. By searching for particles that interact more strongly with the polymer, the compatibility of the doped particles with the polymer will be better, the dispersion will be more uniform, and the separation performance of the mixed matrix membranes will be improved. As the selection of porous materials, in addition to the development of new metal-organic framework MOFs materials, the modification of MOFs, the design of more efficient transport channels and so on are also a trend / development. [ABSTRACT FROM AUTHOR]

Copyright of Experimental Technology & Management is the property of Experimental Technology & Management 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 the Tianjin Polytechnic University / Tianjin Gongye Daxue Xuebao is the property of Journal of Tianjin Polytechnic University 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 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.)

In view of the uneven coating of zeolite seeds by normal dip coating method, SUZ-4 zeolite membrane with 10μm was synthesized on the surface of porous tubular α-Al2O3 support by a new method, and dynamic dip coating method. The results of study show that compared with the normal dip coating method, the SUZ-4 zeolite membrane synthesized by dynamic dip coating method is thinner and more uniform，which shows the better performance in pervaporation dehydration performance for ethyl acetate. Because of the continuous scouring of the seed slurry on the surface of the support by the rotation of the reactor in the dynamic dip coating, so that SUZ-4 seed particles are more evenly spread on the tubular support. On the other hand, the effect of crystallization time, crystallization temperature and rotation speed on the growth and pervaporation performance of the membrane obtained by dynamic dip coating method was also studied. [ABSTRACT FROM AUTHOR]

Copyright of Journal of the Tianjin Polytechnic University / Tianjin Gongye Daxue Xuebao is the property of Journal of Tianjin Polytechnic University 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.)