文献类型：期刊文献

英文题名：Thermodynamic, kinetic, and mechanic studies on esterification reaction of methacrylic acid with methanol based on acidic ion exchange resin

作者：Wang, Mingxia[1];Zhang, Wanting[1];Chen, Lifang[1];Qi, Zhiwen[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2026

卷号：229

起止页码：122

外文期刊名：CHEMICAL ENGINEERING RESEARCH & DESIGN

收录：;EI(收录号：20261520484507);WOS:【SCI-EXPANDED(收录号:WOS:001737385600001)】；

基金：The authors greatly acknowledge financial support from National Natural Science Foundation of China (22472055; 22578116) and Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education (CHCL23002) .

语种：英文

外文关键词：Methyl methacrylate (MMA); Ion exchange resin; Esterification; Thermodynamic; Kinetic models; Reaction mechanism

摘要：The direct esterification of methacrylic acid (MAA) with methanol (MeOH) to produce methyl methacrylate (MMA) with conventional liquid acid catalysts suffers from difficult separation, low economic efficiency, and environmental issues. Herein, we present an acidic ion exchange resin Purolite CT275 as potential industrial catalyst for MMA synthesis from thermodynamic, kinetic, and mechanistic analyses. MMA equilibrium yield of 83% is achieved under optimized conditions employing a 12 wt% catalyst loading with an initial MeOH to MAA molar ratio of 1.2 at 363 K for 6 h. Thermodynamic analysis reveals the reaction is endothermic with an enthalpy change of 83 +/- 5 kJ/mol. To gain further mechanistic insight, kinetic fitting based on experimental data illustrates good consistency between Langmuir-Hinshelwood-Hougen-Watson (LHHW) model and adsorption experimental data, demonstrating that the reaction proceeds via surface reaction as the rate-controlling step. The mechanism is further verified by density functional theory (DFT) calculations, in whose energy analysis confirms the reaction between protonated MAA and MeOH as the rate-controlling step. This comprehensive study provides an efficient process for MMA synthesis and offers fundamental insights into reaction thermodynamics, kinetics, and mechanism for potential industrial applications.