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In this work, agricultural biomass waste (maize) was used as raw material in a pyrolysis-gasification process with the presence of nickel-loaded zeolites, CaO and Al 2 O 3. Henceforward, the reusability and the deteriorating effect of the catalysts are important to be analysed, therefore the catalysts were reused for ten regeneration cycles. During the measurements, the effect of temperature, catalysts and the regeneration cycles of catalysts were also investigated, as well as the components of the gaseous product. At first, the proper temperature was determined in the 1st (200–800 °C) and the 2nd (500–700°) reactor zone, where 400 °C and 700 °C, while for the regeneration 800 °C was chosen. Throughout the regeneration cycles in case of Ni/ZSM-5 lighter hydrocarbons was increased while that of the carbon monoxide and carbon dioxide was decreased. In the presence of Ni/CaO the amount of carbon dioxide decreased until the 3rd regeneration cycle, while carbon monoxide and hydrogen was decreased till the 10th cycle. Regarding the Ni/Al 2 O 3 , the amount of CO 2 and CO was significantly decreased at each cycles, while in case of Ni/Clinoptilolite reduction was observed in hydrogen and carbon dioxide, however not only the amount of carbon monoxide but the syngas yield increased remarkably. Due to the mentioned results, the Ni/Clinoptilolite has an effective syngas enhancing and carbon dioxide capturing effect, even with low pyrolysis temperature. •Nickel supported ZSM-5, Al 2 O 3 , CaO, Clinoptilolite were used for biomass gasification. •In case of Ni/Al 2 O 3 mostly the temperature had an effect on the product yield. •Ni/CaO can be sintered during the regeneration. •The highest syngas yield was found in case of Ni/Clinoptilolite. •The syngas yield increased till the 6th regeneration cycle of Ni/Clinoptilolite. [ABSTRACT FROM AUTHOR]

Abstract In previous work, Soh et al., 2014 [1] obtained >98% conversion of triolein to biodiesel (a fatty acid methyl ester) using temperatures of 95 °C, a methanol to triglyceride ratio of 5:1, and carbon dioxide as a co-solvent that enhanced the miscibility of the oil and methanol reactants. To try to determine the most advantageous conditions to operate such reactions where CO 2 is employed as a benign co-solvent, the PC-SAFT theory has been employed to model the phase behavior of the associated mixtures (including alcohols, CO 2 , fatty esters, and glycerol) that one would encounter throughout the reaction. Modelling results achieved accurate phase behavior representations for pure components, plus binary and ternary mixtures that include carbon dioxide by using a polar version of PC-SAFT. Group contribution methods were employed to predict pure component parameters for a range of fatty acid methyl- and ethyl-esters, simplifying the modelling while minimizing the number of parameters. Small errors were obtained using very low values of binary interaction coefficients (below 0.07) for the binary mixtures. Successful modelling for liquid-liquid and vapor-liquid regimes of binary and ternary systems suggest the possibility to determine process conditions for transesterification performed in multiphasic reactors in presence of CO 2. Highlights • Parametrizing glycerol using PPC-SAFT to be used with CO 2 containing systems. • Calculating binary coefficients for biodiesel alcohols with PPC-SAFT. • Generalizing binary coefficients for biodiesel, alcohols and CO 2 with PPC-SAFT. • Building a predictive model for PE of biodiesel related systems with CO 2 as cosolvent. [ABSTRACT FROM AUTHOR]

Carbon dioxide emitted from fossil fuel burning processes is quantitatively the most contributor to global warming. It is believed that climate change could be mitigated by means of Carbon Capture and Storage (CCS). CO 2 physical adsorption separation has the potential of capture carbon dioxide with minimum energy costs. A special type of metal organic frameworks named Mg-MOF-74 is an exceptional adsorbent amongst other porous materials with high CO 2 uptake at flue gas conditions. Temperature swing adsorption (TSA) composed of 4 steps (feed, rinse, heating, and cooling), for separating CO 2 from CO 2 /N 2 mixture using Mg-MOF-74; has been mathematically modeled. A computer model implementation was developed employing User-Defined-Functions linked to Ansys-Fluent software. The CFD two- and three-dimensional models have been validated against adsorption breakthrough experimental data obtained by the authors, at ambient temperature, and against published experimental data for high temperature conditions. The regeneration (heating and cooling) time has been tuned to explore the performance improvement for the TSA process. The TSA optimal key performance indices in terms of CO 2 purity, recovery, productivity, and process power consumption have been found to be 96.22%, 86.5%, 0.279 kg of CO 2 per hour per kg of Mg-MOF-74, and 663.8 kWh per ton of CO 2 captured, respectively. These productivity and power consumption values showed a substantial enhancement in the CO 2 adsorption separation compared to those reported in the literature, especially when the heating process is used for the desorption part of the process. [ABSTRACT FROM AUTHOR]

Carbon dioxide produced from carbon capture technologies could efficiently be stored into adsorbent materials. Certain types of metal organic frameworks called MOF-5 and MOF-177 are distinguished adsorbents amongst other porous materials owing to their high CO 2 uptake at medium storage pressure (10–50 bars). CO 2 adsorptive storage and energy-consumption analysis at pressures between 5 and 50 bar were numerically investigated using MOF-5 and MOF-177. An experimentally validated model was developed using User Defined-Function (written in C) linked to ANSYS Fluent program. The CFD two and three dimensional models have been validated against experimental data for adsorption storage characteristics of hydrogen on activated carbon. The developed model is feasible to accurately simulate and represent gas adsorptive systems. The results of the multidimensional modeling showed that the 2D model is properly adequate to present the adsorptive storage processes. The results obtained from CO 2 adsorptive storage using MOF-5 and MOF-177 emphasized that MOF-5 is a good choice for CO 2 storage applications at pressure less than 5 bar, while MOF-177 is a superior storage medium for the same purposes at higher pressures (≥10 bar). The optimal storage pressure for both adsorbents may be taken as 30 bar with CO 2 uptake and energy consumption about 21.07 mmol g −1 (0.93 kg_CO 2 kg_MOF −1 ) and 231 kJ tonne_CO 2 −1 for MOF-5, and about 32.5 mmol g −1 (1.43 kg_CO 2 kg_MOF −1 ) and 233 kJ tonne_CO 2 −1 for MOF-177, respectively. Importantly, the CO 2 storage is the next step after its separation from a flue gas using any separation method, and the first step prior to underground geological sequestration. The CO 2 adsorptive storage using MOF-177 showed an efficient method to store much more CO 2 quantity with lower energy-consumption than those of traditional storage systems (gas cylinders – without MOFs). [ABSTRACT FROM AUTHOR]

Limiting the air exchange of passenger vehicles by closing windows and recirculating cabin air (RC) restricts the influx of roadway pollutants and reduces in-vehicle particulate concentrations. However, the carbon dioxide (CO 2 ) exhaled by the occupants can accumulate under these conditions to reach high concentrations. We characterized the factors (ventilation setting, vehicle age, speed, cabin volume, trip duration, and number of occupants) that allow CO 2 accumulation to reach concentration thresholds found in other studies to produce cognitive or physiological effects of concern such as fatigue or difficulty concentrating. Ventilation setting was the primary determinant of CO 2 accumulation; only the RC setting (and not outside-air intake) ever allows CO 2 accumulations to exceed thresholds of concern. Longer trips with multiple occupants are a particular concern. Even so, under RC setting, a 2500 ppm threshold—the threshold consistently linked to detrimental cognitive effects—would not be exceeded for most one- or even two-occupant average-duration commutes (twenty-six minutes in the U.S.). For multiple passenger commutes and/or longer trips, RC ventilation should be periodically interrupted or partially mixed with outside air to keep CO 2 concentrations below 2500 ppm. [ABSTRACT FROM AUTHOR]

Quantitatively, carbon dioxide is the main gas emitted from the burning of fossil fuels; thus, it is the primary contributor to global warming. However, climate change could be mitigated using “carbon capture and storage” (CCS) methods. CO 2 separation by physical adsorption is a promising technology to achieve CO 2 capture with minimum energy costs. Mg-MOF-74 is a distinguished adsorbent amongst porous materials owing to its high CO 2 uptake under flue gas conditions. In this study, a vacuum pressure swing adsorption (VPSA) process composed of five steps (pressurization, feed, rinse, blowdown, and purge) for separating CO 2 from a CO 2 /N 2 mixture using Mg-MOF-74 was mathematically modeled. Two- and three-dimensional computational fluid dynamics (CFD) models were developed using a user-defined-function (UDF, written in C) linked to the ANSYS Fluent program. The models have been validated against published pressure swing adsorption experimental data. The regeneration (blowdown and purge) time has been tuned to explore the performance improvement for the VPSA process. The key optimum performance indices for VPSA in terms of CO 2 purity, recovery, productivity, and process power consumption were found to be 95.3%, 94.8%, 0.50 kg_CO 2 h −1 kg_MOF −1 , and 68.71 kW h tonne_CO 2 −1 , respectively. The corresponding operating carbon capture cost has been evaluated as $6.87 tonne_CO 2 −1 for a 500-MW post-combustion power plant. These CO 2 productivity and power consumption performances represent a significant enhancement in CO 2 separation using physical adsorption technology compared to those reported in the literature. [ABSTRACT FROM AUTHOR]

Background Revascularization appears to be beneficial only in patients with high levels of ischemia. This study examined the utility of gas analysis during the recovery phase of cardiopulmonary exercise testing (CPET) in predicting coronary artery disease (CAD) severity and prognosis. Methods 40 Caucasian patients (21.2% females), mean age 63.5 ± 7.6 with significant coronary artery lesions (≥ 50%) were studied. Within two months of coronary angiography, CPET on a treadmill (TM) and recumbent ergometer (RE) were performed on two visits 2–4 days apart; subjects were subsequently followed 32 ± 10 months. Myocardial wall motion was recorded by echocardiography at rest and peak exercise. Ischemia was quantified by the wall motion score index (WMSI). Results Mean ejection fraction was 56.7 ± 9.6%. Patients with 1–2 stenotic coronary arteries (SCA) showed a poorer CPET response during the recovery phase than patients with 3-SCA. ROC analysis revealed the change of carbon-dioxide output (∆ VCO 2 ) recovery/peak (area under ROC curve 0.77, p = 0.02, Sn = 87.5%, Sp = 70.4%) and oxygen uptake (∆ VO 2 ) recovery/peak during TM CPET (area under ROC curve 0.76, p = 0.03, Sn 75.0%, Sp 77.8%) were significant in distinguishing between 1-2-SCA and 3-SCA. The same variables predicted ΔWMSI peak/rest on univariate analysis (p < 0.05). Multivariate Cox analysis revealed a high predictive value of ∆ VO 2 recovery/peak obtained during TM CPET for composite endpoint of cumulative cardiac events (HR = 1.27, CI = 1.07–1.51, p = 0.008). Conclusions The current study suggests CPET parameters in recovery hold predictive value for CAD severity and prognosis. TM testing seems to be a better approach in the assessment of CAD severity and prognosis. [ABSTRACT FROM AUTHOR]

A two-dimensional transient numerical study of the adsorption of CO 2 /N 2 and CO 2 /H 2 mixtures on activated carbon and MOF-177 in a fixed bed is presented. Because most of the commercial CFD codes are not capable of simulating adsorption processes in a straightforward fashion, we developed an additional code to solve for the different species transport including adsorption and diffusion and used Fluent to simulate the adsorption process, fluid flow, heat and, mass transfer. We simulated the adsorption process at high temperature-low pressure and low temperature-high pressure conditions as well as the pressure swing adsorption. For adsorption of CO 2 /N 2 and CO 2 /H 2 mixtures, Toth and Viral models are used calculate equilibrium isotherms. The breakthrough curves obtained from the simulations compare well with the experimental data. Moreover, the effects of aspect ratio and geometric shapes were studied. The results show that varying the bed aspect ratio from 7.77 to 2 has an insignificant effect on the adsorption capacity and performance. [ABSTRACT FROM AUTHOR]

• Experimental data of vapor-liquid equilibrium (VLE) and density have been analyzed. • Several equations of state have been identified and utilized for validation of data. • The impact of impurities on VLE and density estimations has been discussed. • The accuracy in the prediction of VLE and density has been analyzed. Carbon dioxide management is becoming a major topic of interest in the energy industry and carbon capture is part of this process. Carbon capture utilization and storage is considered a promising technique to mitigate the impact of the hard-to-abate industries. Despite the high level of accuracy of predictions of the thermodynamic behaviour of pure CO 2 , there are still several uncertainties when dealing with CO 2 -rich mixtures. The impact of impurities in the captured stream can impact considerably the sizing and the design of components such as pipelines and related costs. The scope of this work is to assess the capabilities of the most acknowledged Equations of State (EoS) in the energy industry to predict CO 2 -rich mixtures behaviour. In this work we assess their accuracy in the prediction of Vapour-Liquid Equilibrium (VLE) and density validating numerical results with detailed experimental data available in literature. A quantitative estimation of deviations from experimental data is provided for density and bubble points. The results show that, based on experimental data available, multi-parameters Equations of State, such as GERG-2008 and CSMA, are generally more accurate in the description of both VLE and density if compared with cubic EoS. [ABSTRACT FROM AUTHOR]

The emission reduction benefits of EVs are dependent on the time and location of charging. An analysis of battery electric and plug-in hybrid vehicles under four charging scenarios and five electricity grid profiles shows that CO 2 emissions are highly dependent on the percentage of fossil fuels in the grid mix. Availability of workplace charging generally results in lower emissions, while restricting charging to off-peak hours results in higher total emissions. [ABSTRACT FROM AUTHOR]

Highlights: [•] Encroachment of woody biomass in rangelands and grasslands of central Texas. [•] Torrefaction as viable pretreatment option for Mesquite and Juniper. [•] Effect of carbon dioxide as medium for torrefaction. [•] Increased weight loss and improved grindability on using CO2 for torrefaction. [ABSTRACT FROM AUTHOR]

Abstract: The variability of CO2 concentrations and fluxes in dense urban environments is high due to the inherent heterogeneity of these complex areas and their spatio-temporally variable anthropogenic sources. With a focus on micro- to local-scale CO2-exchange processes, measurements were conducted in a street canyon in the city of Basel, Switzerland in 2010. CO2 fluxes were sampled at the top of the canyon (19 m) and at 39 m while vertical CO2 concentration profiles were measured in the center and at a wall of the canyon. CO2 concentration distributions in the street canyon and exchange processes with the layers above show, apart from expected general diurnal patterns due mixing layer heights, a strong dependence on wind direction relative to the canyon. As a consequence of the resulting corkscrew-like canyon vortex, accumulation of CO2 inside the canyon is modulated with distinct distribution patterns. The evaluation of diurnal traffic data provides good explanations for the vertical and horizontal differences in CO2-distribution inside the canyon. Diurnal flux characteristics at the top of the canyon can almost solely be explained with traffic density expressed by the strong linear dependence. Even the diurnal course of the flux at 39 m shows a remarkable relationship to traffic density for east wind conditions while, for west wind situations, a change toward source areas with lower emissions leads to a reduced flux. [Copyright &y& Elsevier]

Abstract: An open top chamber (OTC) study was conducted with two replications to investigate the impact of elevated CO2 (580ppm) on canopy radiation interception and its use in relation to yield components of two pigeon pea (Cajanus cajan L.) cultivars Pusa-992 and PS-2009. Two OTCs with ambient CO2 of 380ppm were used as control. The LAI and above ground biomass were significantly higher during most of the growth stages for plants exposed to higher CO2 concentration. The canopy radiation extinction coefficient (k) values for both the cultivars were lower for plants exposed to elevated CO2 than for control plants, indicating a more erect structure of these plants. However, the radiation use efficiency (RUE) was 52.3% higher for plants grown under elevated CO2 than for plants grown under ambient CO2 for both the cultivars. The canopy temperature of plants grown under elevated CO2 was found to be lower throughout the growing period. Correspondingly, these plants were supported by higher soil moisture depletion from deeper soil layers. In cultivar Pusa-992, seed yield increased by 12.0% under elevated CO2 because of increase in pod numbers and weight. But in this cultivar, the significant increase (40.6%) in biomass under elevated CO2 did not translate into a corresponding increase in seed yield due to lower harvest index and less numbers of seed per pod. Under elevated CO2, the other cultivar PS-2009 became indeterminate and did not mature, resulting in undeveloped pods. Hence in PS-2009, elevated CO2 resulted in poor seed yield, pod numbers and pod weight even though the biomass produced was higher. Elevated CO2 in the future may result in higher biomass production and higher RUE in pigeon pea due to carbon fertilization, but may not cause a corresponding gain in grain yield because it may lower harvest index. [Copyright &y& Elsevier]

Abstract: Modeled carbon-dioxide (CO2) emissions from an urban area are validated against direct eddy-covariance flux measurements. Detailed maps of modeled local carbon-dioxide emissions for a 4 km2 residential neighborhood in Vancouver, BC, Canada are produced. Inputs to the emission model include urban object classifications (buildings, trees, land-cover) automatically derived from Light Detection and Ranging (LiDAR) and optical remote sensing in combination with census, assessment, traffic and measured radiation and climate data. Different sub-models for buildings, transportation, human respiration, soils and vegetation were aggregated. Annual and monthly CO2 emissions were modeled on a spatial grid of 50 m for the entire study area. The study area overlaps with the source area of a micrometeorological flux tower for which continuous CO2 flux data (net exchange) were available for a two-year period. The measured annual total was 6.71 kg C m−2 yr−1with significant seasonal differences (16.0 g C m−2 day−1 in Aug vs. 22.1 g C m−2 day−1 in Dec correlated with the demand for space heating) and weekday-weekend differences (25% lower emissions on weekends attributed to traffic volume differences). Model results were weighted using the long-term turbulent source areas of the tower. Annual total modeled (7.42 kg C m−2 yr−1) and measured emissions agreed within 11%, but show more substantial differences in wind sectors dominated by traffic emissions. Over the year, agreement was better in summer (5% overestimation by model) vs. winter (15% overestimation), which is partially attributed to climate differences unaccounted for in the building energy models. The study shows that direct CO2 flux measurements based on the EC approach - if sites are carefully chosen - are a promising method to validate fine-scale emission inventories/models at the block or neighborhood scale and can inform further model improvements. [Copyright &y& Elsevier]

In-silico amine screening is a fast, low-cost and promising way of efficiently evaluating new amine molecules which are proposed for carbon-dioxide capture purposes. In order to implement the screening environment, reliable and robust absorber models are required. This contribution presents the modeling and validation results of a CO2 capture pilot absorber operated with monoethanolamine (MEA), as the first step of the in-silico solvent screening framework. The simulation results have shown that the outlet amine loading can be predicted with a 10% deviation from the experimental values for one column, with larger deviations for the second. In addition the model was extended to include the calculation of the overall mass transfer coefficient from laboratory based wetted-wall experiments completed at CSIRO Newcastle, Australia. This further improved the overall model prediction and significantly reduced the amine loading prediction error for the column 1. Note that no parameter fitting was performed on the pilot plant experimental data, other than to include a heat loss to the atmosphere term, and the model relies entirely on engineering and property correlations available in the scientific literature. [ABSTRACT FROM AUTHOR]

Abstract: Anxiety sensitivity (AS) is a well-researched risk factor for the development of anxiety psychopathology. AS is typically measured using the anxiety sensitivity index (ASI) but limitations have led to the creation of second generation measures of AS including the anxiety sensitivity profile (ASP). The ASP has not been used very extensively, however, and we believe this may be due to two important issues: (1) the ASP is lengthy, and (2) the predictive validity of the ASP is unexplored in relation to critical outcomes such as anxiety psychopathology. The purpose of the present report was to address these two issues. We evaluated whether an abbreviated form of the ASP was viable and also conducted tests of the scale''s predictive validity. Findings suggest that a 22-item version of the ASP (i.e., ASP-22) is comparable to the original 60-item ASP. Moreover, the ASP-22 was predictive of anxious responding to a CO2 challenge. In fact, the ASP-22 outperformed the ASI as a predictor of CO2 reactivity. Also, the ASP-22 was a significant longitudinal predictor of incidence of Axis I diagnoses. In regard to predictive validity, the ASP-22 was comparable to the original ASP. In summary, the ASP-22 appears to represent a viable measure of AS that may complement the ASI. [Copyright &y& Elsevier]

Abstract: Experimental data are presented which illustrate heat transfer characteristics of the turbulent supercritical flow in vertical circular/non-circular channels. The working fluid was carbon-dioxide operating at a constant pressure of 8MPa. Experiments were conducted at various conditions with inlet bulk fluid temperatures ranging from 15 to 32°C, imposed heat fluxes from 3 to 180kW/m2, and mass fluxes from 209 to 1230kg/m2 s. The corresponding Reynolds numbers were within the range of 3×104 to 1.4×105. Wall temperatures are presented for the three channels with different cross-sectional shapes. These were measured by thermocouples installed on the outer surface of the heating section, and are compared with each other at the same heat flux and mass flux conditions. [Copyright &y& Elsevier]

• Method to hinder degrading electrical properties of Indium tin oxide transparent electrode. • Carbon-dioxide as an efficient annealing ambient. • Proposed ambient suppress formation of oxygen interstitials and reduce vacancy. In practical applications of indium-tin-oxide (ITO), annealing at temperatures ~400 °C without degrading its electrical and optical properties is an important challenge. In the present work, commercial Indium-tin oxide (ITO) coated on glass was subjected to post-annealing treatment in the range of 200–400 °C at different annealing atmospheres; oxygen, nitrogen and carbon-dioxide. The annealed samples were characterized by X-ray diffraction, UV–visible spectroscopy and Hall measurements to evaluate the structural, optical and electrical properties. Both oxygen and nitrogen treated samples demonstrate degradation in structural, optical and conducting properties of ITO, while carbon-dioxide atmosphere inhibits the degradation of ITO at 400 °C. The obtained results suggest that carbon-dioxide can be well utilized as annealing ambient to retain opto-electronic and structural properties of ITO and thereby improve the efficiency of ITO based solar cells. [ABSTRACT FROM AUTHOR]

This paper presents the mathematical models describing the diffusion of carbon-dioxide in concrete with considering the effect of concrete carbonation. The effect of concrete carbonation on carbon-dioxide diffusion is modelled by using a sink term added in the diffusion equation. It is shown that, when the carbonation reaction is much faster than the diffusion process, the diffusion of carbon-dioxide in carbonated concrete can be treated as the diffusion problem with a moving boundary, representing the diffusion front or the carbonation depth. An analytical solution is also derived for the diffusion problem with moving boundary. [ABSTRACT FROM AUTHOR]

• Terrestrial carbon remineralization reduces aragonite-saturation and increases pCO 2. • Export production and terrestrial CaCO 3 dissolution offset remineralization effects. • Changes in marine pCO 2 and Ω Ar depend on watershed geology and organic matter C:N. Recent research has focused on the changing ability of oceans to absorb atmospheric CO 2 and the consequences for ocean acidification, with Arctic shelf seas being among the most sensitive regions. Hudson Bay is a large shelf sea in northern Canada whose location at the margin of the cryosphere places it in the vanguard of global climate change. Here, we develop a four-compartment box-model and carbon budget using published and recently collected measurements to estimate carbon inputs, transformations, and losses within Hudson Bay. We estimate the annual effects of terrestrial carbon remineralization on aragonite saturation (Ω Ar , a proxy for ocean acidification) and on the partial pressure of CO 2 (pCO 2 , a proxy for air-sea CO 2 flux) within each compartment, as well as the effects of marine primary production, marine organic carbon remineralization, and terrestrial calcium carbonate dissolution. We find that the remineralization of terrestrial dissolved organic carbon is the main driver of CO 2 accumulation and aragonite under-saturation in coastal surface waters, but this is largely offset by marine primary production. Below the surface mixed layer, marine organic carbon remineralization is the largest contributor to CO 2 accumulation and aragonite under-saturation, and is partially offset by terrestrial CaCO 3 dissolution. Overall, the annual delivery and processing of carbon reduces Ω Ar of water flowing through HB by up to 0.17 units and raises pCO 2 by up to 165 µatm. The similarities between Hudson Bay and other Arctic shelf seas suggest these areas are also significantly influenced by terrestrial carbon inputs and transformation. [ABSTRACT FROM AUTHOR]

Soh et al. [1] showed that one can achieve high conversion (98%) of triglycerides to fatty acid methyl esters at 95 °C when carbon dioxide (CO 2) is used as a co-solvent to enhance mixing of the immiscible alcohol and triglyceride. Soh's results demonstrated the benefits of using CO 2 as a co-solvent yet did not provide information on the evolution of the phase behavior during the reaction. The PC-SAFT equation of state has been employed to understand and predict the phase behavior of the various biodiesel components versus temperature and pressure in the presence of CO 2. In previous work [2] the interaction between alkyl-esters and low molecular weight alcohols, glycerol, and CO 2 were investigated. Polar PC-SAFT and the Group Contribution PPC-SAFT EoS were used to model phase equilibria amongst the various multicomponent systems. The same approach is extended here, specifically applied to mixtures containing tri-, di- and monoglycerides plus low molecular weight alcohols and CO 2. Data for different types of glycerides are scarce and in general the phase boundary curves in CO 2 -based mixtures are only weakly dependent on CO 2 concentration, creating curves with very high slopes in P-T space that accumulate larger prediction errors compared to the previously investigated alkyl-ester systems. Nonetheless, it was found that one could generate a general correlation for binary interaction coefficient that depends only on carbon chain length and degree of unsaturation for description of triglyceride-CO 2 mixtures. Binary interaction parameters as low as 12% were obtained for all glyceride-methanol systems and binary interaction coefficient below 3.5% are sufficient to correctly capture CO 2 – glyceride vapor-liquid and liquid-liquid phase equilibria. [ABSTRACT FROM AUTHOR]