Solubility determination and thermodynamic calculation of CO<sub>2</sub>in several ether esters

Xueman XU; Xia GUI; Zhi YUN

doi:10.11949/0438-1157.20190360

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Solubility determination and thermodynamic calculation of CO₂in several ether esters

Thermodynamics | 更新时间：2020-06-24

- Solubility determination and thermodynamic calculation of CO₂in several ether esters
- CIESC Journal Vol. 70, Issue 11, Pages: 4113-4122(2019)
- 作者机构：
  
  College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190360
  CLC： O 642.4⁺²
- Received：08 April 2019，
  
  Revised：2019-07-01，
  
  Published：05 November 2019
- 稿件说明：
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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.

XU Xueman, GUI Xia, YUN Zhi. Solubility determination and thermodynamic calculation of CO₂ in several ether esters[J]. CIESC Journal, 2019, 70(11): 4113-4122 DOI: 10.11949/0438-1157.20190360.
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. DOI：

XU Xueman, GUI Xia, YUN Zhi. Solubility determination and thermodynamic calculation of CO₂ in several ether esters[J]. CIESC Journal, 2019, 70(11): 4113-4122 DOI: 10.11949/0438-1157.20190360. DOI：

摘要

采用恒定容积法，在温度353.15、363.15、373.15 K下，测定了CO

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CO

在醚酯体系中溶解度受温度、压强的影响较大，压强一定时，CO

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，CO

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CO

在醚酯溶剂中的Gibbs自由能Δ

sol

，溶解焓变Δ

sol

和熵变 Δ

sol

等热力学性质，从宏观热运动角度进一步解释了CO

的溶解机理，为开发新型CO

物理吸收剂提供理论支撑。

Abstract

In this study

the solubility of CO

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 CO

in the ether esters solvents decreased with the increasing of temperature

increased with the increasing of pressure

and the solubility was PMA

EPA

BAC

DPMA

which was greatly affected by temperature and pressure. Meanwhile

thermodynamic properties of the Gibbs free energy Δ

sol

enthalpy change Δ

sol

and entropy change Δ

sol

of CO

+ ether ester system at different temperatures were also calculated by transformed Clausius-Clapeyron equation

further explained the dissolution mechanism of CO

from the perspective of macroscopic thermal motion

and provided theoretical support for the development of new CO

physical absorbents.

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Keywords

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⁰

Solubility determination and thermodynamic calculation of CO2in several ether esters

DOI：10.11949/0438-1157.20190360

摘要

Abstract

关键词

Keywords

references

Solubility determination and thermodynamic calculation of CO₂in several ether esters