统计速率理论研究乙醇-水溶液中硫酸钾晶体的溶解动力学

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统计速率理论研究乙醇-水溶液中硫酸钾晶体的溶解动力学

刘畅; 冯新; 吉晓燕; 陈栋梁; 魏涛; 陆小华

Nanjing University of Technology, Nanjing 210009, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-02-28 发布日期:2004-02-28
通讯作者: 刘畅

The Study of Dissolution Kinetics of K2SO4 Crystal in Aqueous Ethanol Solutions with a
Statistical Rate Theory

LIU Chang; FENG Xin; JI Xiaoyan; CHEN Dongliang; WEI Tao; LU Xiaohua

Nanjing University of Technology, Nanjing 210009, China

Received:1900-01-01 Revised:1900-01-01 Online:2004-02-28 Published:2004-02-28
Contact: LIU Chang

摘要/Abstract

摘要： Dissolution kinetics of K2SO4 crystal in aqueous ethanol solutions was studied on-line with
ion selective electrode. The concentration of K2SO4 was calculated from the determined
electromotive force in which the activity coefficient of components in the liquid phase was
calculated with the Pitzer equation. Dissolution kinetic parameters in the modified
statistical rate theory were regressed. The correlation results show that dissolution rate
of K2SO4 is slower in aqueous ethanol solutions than that in aqueous solutions. The two
most important reasons are as follows:(1) The solubility of K2SO4 in aqueous ethanol
solutions is lower than that in aqueous solutions, which causes a decrease of the driving
force of mass transfer. (2) The process of surface reaction of K2SO4 became slower due to
the addition of ethanol, so that the whole process is mainly dominated by the surface
reaction instead of mass transfer.

关键词: potassium sulfate;dissolution kinetics;ethanol

Abstract: Dissolution kinetics of K2SO4 crystal in aqueous ethanol solutions was studied on-line with
ion selective electrode. The concentration of K2SO4 was calculated from the determined
electromotive force in which the activity coefficient of components in the liquid phase was
calculated with the Pitzer equation. Dissolution kinetic parameters in the modified
statistical rate theory were regressed. The correlation results show that dissolution rate
of K2SO4 is slower in aqueous ethanol solutions than that in aqueous solutions. The two
most important reasons are as follows:(1) The solubility of K2SO4 in aqueous ethanol
solutions is lower than that in aqueous solutions, which causes a decrease of the driving
force of mass transfer. (2) The process of surface reaction of K2SO4 became slower due to
the addition of ethanol, so that the whole process is mainly dominated by the surface
reaction instead of mass transfer.

Key words: potassium sulfate, dissolution kinetics, ethanol

刘畅, 冯新, 吉晓燕, 陈栋梁, 魏涛, 陆小华. 统计速率理论研究乙醇-水溶液中硫酸钾晶体的溶解动力学[J]. CIESC Journal.

LIU Chang, FENG Xin, JI Xiaoyan, CHEN Dongliang, WEI Tao, LU Xiaohua. The Study of Dissolution Kinetics of K2SO4 Crystal in Aqueous Ethanol Solutions with a
Statistical Rate Theory[J]. .

参考文献

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统计速率理论研究乙醇-水溶液中硫酸钾晶体的溶解动力学

The Study of Dissolution Kinetics of K2SO4 Crystal in Aqueous Ethanol Solutions with a
Statistical Rate Theory

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The Study of Dissolution Kinetics of K2SO4 Crystal in Aqueous Ethanol Solutions with a
Statistical Rate Theory