K-CoMoS催化剂上合成气制低碳醇的宏观动力学  

Apparent kinetics of syngas to higher alcohols catalyzed by K-CoMoS catalyst

作　　者：田大勇 杨如意 刘媛 TIAN Dayong;YANG Ruyi;LIU Yuan(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211

出　　处：《高校化学工程学报》2024年第3期440-448,共9页Journal of Chemical Engineering of Chinese Universities

基　　金：国家重点研发计划(2018YFB0604700)。

摘　　要：针对K促进的掺杂Co的MoS_(2)催化剂(K-CoMoS),设计合成气(H_(2)+CO)制低碳醇的动力学实验,利用固定床反应器测定反应数据,建立CO消耗和低碳醇生成的宏观动力学模型。模型参数回归结果表明,CO消耗活化能为105.16 kJ·mol^(-1),低碳醇链增长活化能为56.9 kJ·mol^(-1),链终止活化能为55.2 kJ·mol^(-1),链增长的反应速率低于链终止的反应速率,是速率控制的关键步骤。通过动力学模型预测,提高CO分压有利于提高低碳醇的选择性,与实验值一致,证明了该动力学模型的合理性。A kinetic experiment was designed for the synthesis of higher alcohols from syngas using the K promoted MoS_(2) catalyst incorporated with Co(K-CoMoS),and the reaction results in a fixed bed reactor were obtained and the corresponding apparent kinetic models of CO consumption and higher alcohols formation were established.The regression results of model parameters show that the activation energy of CO consumption is 105.16 kJ×mol^(-1),and the energies of higher alcohols chain growth and chain termination are 56.9 kJ×mol^(-1) and 55.2 kJ×mol^(-1) respectively.Furthermore,the chain growth rate is lower than the chain termination rate,

关 键 词：K-CoMoS 催化剂 合成气 低碳醇 宏观动力学 

分 类 号：TQ021.4[化学工程]