Thermodynamic Analysis on Maleic Anhydride Selective Hydrogenation System
YANG Youwei, CHEN Liangfeng, WANG Jian, GUO Kai, WANG Limin, WANG Wanmin, ZHU Junhua
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, SINOPEC Shanghai Research Institute of Petrochemical Technology Company Limited, Shanghai 201208, China
Abstract：The selective hydrogenation of maleic anhydride (MA) could yield a variety of important chemical feedstocks, and the product distribution is greatly affected by reaction temperature. Thermodynamic analysis plays an important role in linking the chemical process and product selectivity. In this work, the effect of reaction temperature on different reaction pathways and product selectivity in maleic anhydride hydrogenation was investigated by thermodynamic analysis. Firstly, the molar enthalpy, entropy and heat capacity of MA, succinic anhydride, and 1,4-butanediol were estimated by using Benson group contribution method. Then, the reaction enthalpy, Gibbs free energy change and equilibrium constant for different reactions were calculated and analyzed. Finally, a typical Cu/SiO2 catalyst in industry was used to verify the influence of temperature on product selectivity. The experimental result was consistent with the thermodynamic calculation. This work provides theoretical guidance for exploring the product distribution and regulating the process parameters in maleic anhydride hydrogenation network.
YANG Youwei,CHEN Liangfeng,WANG Jian et al. Thermodynamic Analysis on Maleic Anhydride Selective Hydrogenation System[J]. Chemical Reaction Engineering and Technology, 2025, 41(3): 382-389.
