化工学报2023，Vol.74Issue(11)：4475-4486,12.DOI:10.11949/0438-1157.20230902
复合型多元醇酯合成反应的热力学分析及动力学研究
Thermodynamic analysis and kinetics study on synthesis reaction of complex polyolester
刘宗鹏 1胡少剑 1张宇宁 1马玲 2李磊 2武本成 1朱建华1
作者信息
- 1. 中国石油大学(北京)化学工程与环境学院,北京 102249
- 2. 中石油克拉玛依石化有限责任公司炼油化工研究院,新疆 克拉玛依 834000
- 折叠
摘要
Abstract
The basic thermodynamic data of each component in the complicated esterification system comprised of adipic acid,2-ethylhexanol and trimethylolpropane were estimated by using group-contribution method,and the influence of temperature on standard enthalpy change,entropy change,Gibbs free energy change and equilibrium constant of these reactions was also investigated,the thermodynamic analysis results indicated that all the esterification reactions were endothermic and spontaneous processes under the specified temperature condition,increasing temperature is beneficial to promote the positive reaction.The kinetics of the esterification reactions of adipic acid and 2-ethylhexanol and adipic acid mono-2-ethylhexanol ester and trimethylolpropane catalyzed by stannous oxide were studied.The experimental results demonstrated that the two main reactions were both controlled by kinetics and which match the second-order irreversible reaction kinetics characteristics within a certain conversion range,the activation energy and pre-exponential factors of the reactions were determined as well,the established kinetic model can relatively accurately describe the synthesis process of complex polyolester.关键词
复合型多元醇酯/酯化/热力学性质/氧化亚锡/反应动力学Key words
complex polyolester/esterification/thermodynamic properties/stannous oxide/reaction kinetics分类
化学化工引用本文复制引用
刘宗鹏,胡少剑,张宇宁,马玲,李磊,武本成,朱建华..复合型多元醇酯合成反应的热力学分析及动力学研究[J].化工学报,2023,74(11):4475-4486,12.
