Measurement and correlation of solubility of carbon dioxide in triglycerides. (January 2017)

• Record Type: Journal Article
• Authors: Howlader, Md Shamim; French, William Todd; Toghiani, Hossein; Hartenbower, Ben; Pearson, Larry; DuBien, Janice; Rai, Neeraj
• Is Part Of: Journal of chemical thermodynamics. Volume 104(2017)
• Page Start: 252
• Page End: 260
• Publication Date: 2017-01
• Subjects: Solubility -- Henry's law constant -- Biofuels -- Cell disruption -- Thermodynamic modeling; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2016.09.035
• Languages: English
• ISSNs: 0021-9614

Abstract

Graphical abstract: Comparison of experimental results with correlation for solubility of CO2 in triglycerides as a function pressure at two different temperatures of 289.15 and 303.15 K, respectively. Highlights: New pressure drop gas apparatus was developed to determine the solubility of gases in liquids. Solubility of CO2 in triglycerides was measured at different temperatures and pressures. Experimental solubility data were correlated using three thermodynamic models. Enthalpy, entropy and Gibbs energy of dissolution for CO2 -triglyceride were determined. Abstract: A new pressure drop solubility gas apparatus was developed to determine the solubility of carbon dioxide in canola oil, a triglyceride consisting primarily of oleic, linoleic, and alpha linoleic acid radicals. Solubility of CO2 in triglycerides was determined at different temperatures (283.2–303.2 K) and pressures (600–2450 kPa). It was found that the solubility of CO2 in triglycerides is higher than that of pure water because triglycerides lack strong hydrogen bond networks that exist in liquid water at the ambient conditions. The experimental solubility was correlated using Krichevsky–Kasarnovsky (KK), Mather-Jou (MJ), and Carvalho-Coutinho (CC) correlations. We find that KK and MJ equations can predict the solubility with higher accuracy. The enthalpy and entropy of absorption of CO2 were calculated using the van't Hoff plot and were found to be −7.165 kJ.mol −1, and −28.791 J.mol −1 .K −1, respectively.