| CO2在醚酯溶剂中的溶解度测定及热力学计算 |
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| 引用本文： | 徐学满,桂霞,云志. CO2在醚酯溶剂中的溶解度测定及热力学计算[J]. 化工学报, 2019, 70(11): 4113-4122. DOI: 10.11949/0438-1157.20190360 |
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| 作者姓名： | 徐学满 桂霞 云志 |
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| 作者单位： | 南京工业大学化工学院,江苏南京,211816;南京工业大学化工学院,江苏南京,211816;南京工业大学化工学院,江苏南京,211816 |
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| 基金项目： | 国家自然科学基金面上项目(NSFC 21676145);江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 采用恒定容积法，在温度353.15、363.15、373.15 K下，测定了CO2在丙二醇甲醚醋酸酯(PMA)、二丙二醇甲醚醋酸酯(DPMA)、乙二醇丁醚醋酸酯(BAC)以及乙二醇苯醚醋酸酯(EPA)中的溶解度数据，压力最高可达11.73 MPa。结果表明CO2在醚酯体系中溶解度受温度、压强的影响较大，压强一定时，CO2在醚酯中溶解度随温度升高而减小；温度一定时，随着压强增大而增大；相同条件下，CO2在四种醚酯中溶解度大小为PMA＜ EPA＜BAC＜DPMA。通过变形Clausius - Clapeyron方程，计算得到CO2在醚酯溶剂中的Gibbs自由能Δsol G，溶解焓变Δsol H和熵变 Δsol S等热力学性质，从宏观热运动角度进一步解释了CO2的溶解机理，为开发新型CO2物理吸收剂提供理论支撑。
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| 关 键 词： | 溶解度 恒定体积法 CO2 醚酯溶剂 热力学性质 |
| 收稿时间： | 2019-04-08 |
| 修稿时间： | 2019-07-01 |
Solubility determination and thermodynamic calculation of CO2in several ether esters |
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| Xueman XU,Xia GUI,Zhi YUN. Solubility determination and thermodynamic calculation of CO2in several ether esters[J]. Journal of Chemical Industry and Engineering(China), 2019, 70(11): 4113-4122. DOI: 10.11949/0438-1157.20190360 |
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| Authors: | Xueman XU Xia GUI Zhi YUN |
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| Affiliation: | College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China |
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| Abstract: | In this study, the solubility of CO2 in propylene glycol monomethyl ether acetate (PMA), di(propylene glycol) methyl ether acetate (DPMA), 2-butoxyethyl acetate (BAC) and acetic acid 2-phenoxyethyl ester (EPA) was measured at the temperature variations from 353.15 K to 373.15 K rang up to 11.73 MPa by the constant-volume method. Results showed that the solubility of CO2 in the ether esters solvents decreased with the increasing of temperature, increased with the increasing of pressure, and the solubility was PMAsol G, enthalpy change Δsol H and entropy change Δsol S of CO2 + ether ester system at different temperatures were also calculated by transformed Clausius-Clapeyron equation, further explained the dissolution mechanism of CO2 from the perspective of macroscopic thermal motion, and provided theoretical support for the development of new CO2 physical absorbents. |
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| Keywords: | solubility constant-volume method CO2 ether ester solvents thermodynamic properties |
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