Liquid-phase esterification of methacrylic acid with methanol catalyzed by cation-exchange resin in a fixed bed reactor: Experimental and kinetic studies

• Published in: Chinese journal of chemical engineering Vol. 58; no. 6; pp. 1 - 10
• Main Authors: Liu, Junyang, Wang, Luming, Bian, Yuhang, Li, Chunshan, Li, Zengxi, Li, Jie
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.06.2023; Beijing Key Laboratory of Ionic Liquids Clean Process,Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China; Beijing Key Laboratory of Ionic Liquids Clean Process,Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China%Beijing Key Laboratory of Ionic Liquids Clean Process,Key Laboratory of Green Process and Engineering,State Key Laboratory of Multiphase Complex Systems,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China%School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China; Langfang Technological Center of Green Industry,Langfang 065801,China%School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China; School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China
• Subjects: Cation-exchange resin; Esterification; Fix bed reactor; Kinetics; Methyl methacrylate; Kinetics; Fix bed reactor; Methyl methacrylate; Esterification; Cation-exchange resin
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2022.10.011

[Display omitted] The kinetic behavior of esterification between methacrylic acid and methanol catalyzed by NKC-9 resin was studied in a fixed bed reactor. The reaction was conducted in the temperature range of 323.15 to 368.15 K with the molar ratio of reactants from 0.8 to 1.4 under certain pressure. The measurement data were regression with the pseudo-homogeneous (P-H), Eley-Rideal (E-R), and Langmuir-Hinshelwood (L-H) heterogeneous kinetic models. Independent adsorption experiments were implemented to gain the adsorption equilibrium constants of four components. Among the above three models, the L-H model exhibited the best fitting results. The stability of NKC-9 was evaluated by long-term running with the yield of methyl methacrylate no decrease during 3000 h operation. The structure and physicochemical properties of the new and used catalyst were performed by several characterizations including thermogravimetric analysis (TG), scanning electron microscope (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) and so on.