Experimental study and thermodynamic model for respective solubilities of CO2 and ethanol for CO2‐ethanol‐polystyrene ternary system at elevated pressure and temperature |
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| Authors: | Ying‐Hui Qian Jun‐Ming Cao Xue‐Kun Li Gui‐Ping Cao Chang‐Chun Wang Yun‐Hai Shi |
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| Affiliation: | 1. UNILAB, State Key Lab of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Department of Chemistry, Fudan University, Shanghai 200433, China;3. Department of Macromolecular Science, Fudan University, Shanghai 200433, China |
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| Abstract: | Foamed non‐Fickian diffusion (FNFD) model for a ternary system was proposed for the first time to regress the desorption data obtained by the gravimetric method. Results showed that FNFD model could accurately describe the diffusion behavior of CO2 and ethanol out of foamed polystyrene (PS) and well predict total solubilities of CO2 and ethanol in foamed PS. Meanwhile, Sanchez–Lacombe equation of state (S–L EoS) was adopted to calculate the respective solubilities (solubility of CO2 in PS or solubility of ethanol in PS) and total solubilities of CO2 and ethanol in PS for CO2‐ethanol‐PS ternary system. Results showed that the total solubility of CO2 and ethanol obtained from S–L EoS agreed well with values obtained by FNFD model. Furthermore, the respective and total solubilities of CO2 and ethanol at 313.15, 338.15, and 343.15 K were calculated by S–L EoS. Results indicated that in the dissolving process, ethanol would be accelerated by CO2 to dissolve into PS, and ethanol would compete with CO2 to dissolve into PS, simultaneously. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 46281. |
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| Keywords: | adsorption swelling theory and modeling thermal properties |
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