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CO2在离子液体N-乙基吗啉乙酸盐中的溶解度

作者:时间:2023-10-08点击数:


下载全文: 202305005.pdf

 

文章编号: 1672-6987202305-0043-09 DOI 10.16351/j.1672-6987.2023.05.005


王宁, 杨园园, 程华农*, 郑世清(青岛科技大学 化工学院, 山东 青岛 266042


摘要: 测定了温度29815~33815 K、压力0~900 kPa下,CO2在质子型离子液体N-乙基吗啉乙酸盐(\[NEMH\]\[Ac\])中的溶解度。采用Soave-Redlich-KwongSRK)立方型状态方程对溶解度数据进行拟合,平均相对偏差和最大相对偏差分别为094%286%,具有满意的准确性。通过溶解度数据,估算了CO2\[NEMH\]\[Ac\]中零压力下的亨利定律常数,并计算了无限稀释条件下的偏摩尔吉布斯自由能、偏摩尔焓和偏摩尔熵。结果表明,\[NEMH\]\[Ac\]CO2的亲和力,以及CO2\[NEMH\]\[Ac\]中的有序度随着温度的升高而降低。CO2\[NEMH\]\[Ac\]中的溶解是放热的,有利于CO2的溶解。相对现有的醇胺法工艺,CO2的解吸能耗较低,吸收剂更容易再生。


关键词: 二氧化碳; 离子液体; 溶解度; 模型; 亨利定律常数


中图分类号: TQ 013.1文献标志码: A

引用格式: 王宁, 杨园园, 程华农, 等. CO2在离子液体N-乙基吗啉乙酸盐中的溶解度[J. 青岛科技大学学报(自然科学版), 2023, 44(5): 43-51.


WANG Ning YANG Yuanyuan CHENG Huanong et al. Solubility of CO2 in ionic liquid N-ethylmorpholine acetateJ. Journal of Qingdao University of Science and TechnologyNatural Science Edition), 2023 445): 43-51.


Solubility of CO2 in Ionic Liquid N-Ethylmorpholine Acetate


WANG Ning YANG Yuanyuan CHENG Huanong ZHENG Shiqing

(College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)


Abstract: The solubility of CO2 in protic ionic liquid N-ethylmorpholine acetate (\[NEMH\]\[Ac\]) was determined at temperatures from 29815 to 33815 K and pressures from 0 to 900 kPa. The Soave-Redlich-Kwong (SRK) cubic equation of state was used to fit the solubility data, and the average relative deviation and maximum relative deviation were 094% and 286%, respectively, with satisfactory accuracy. From the solubility data, the Henry′s law constant for CO2 at zero pressure in \[NEMH\]\[Ac\] was estimated, and the partial molar Gibbs free energy, partial molar enthalpy, and partial molar entropy at infinite dilution were calculated. The results showed that the affinity of \[NEMH\]\[Ac\] for CO2 and the order degree of CO2 in \[NEMH\]\[Ac\] decreased with increasing temperature. The dissolution of CO2 in \[NEMH\]\[Ac\] is exothermic, favoring the dissolution of CO2. Compared with the existing alcoholamine process, the energy consumption of CO2 desorption is lower, and the absorbent is easier to regenerate.


Key words: carbon dioxide; ionic liquid; solubility; modeling; Henry′s law constant


收稿日期: 2022-09-02

基金项目: 山东省自然科学基金项目(ZR2020MB145.

作者简介: 王宁(1997—), , 硕士研究生.*通信联系人.




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