钴钼成型催化剂上水煤气变换反应宏观动力学  

Study of apparent kinetics of water-gas shift reaction over a pelleted CoMo catalyst

作　　者：沈尹 王杰[1] SHEN Yin;WANG Jie(Department of Chemical Engineering for Energy,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学能源化工系,上海200237

出　　处：《化学工程》2020年第9期55-59,69,共6页Chemical Engineering(China)

摘　　要：利用实验室固定床反应器,在150 kPa总压和微分反应条件下研究了含硫合成气在一种工业用球形颗粒钴钼催化剂上的水蒸气变换反应动力学行为,获得了幂函数动力学方程。统计检验显示,模型中反应速率与各参数的变化关系高度显著,所得反应活化能为37.66 kJ/mol,与文献报道相比较小,而CO和H 2 O的反应级数分别为1.94和0.59,相比文献值较大;反应速率的模型计算值与实验值较好吻合。利用X线衍射(XRD)和X射线光电子能谱(XPS)等分析方法进行了催化剂表征,初步提出了催化反应机理,以解释CO反应级数较高的实验结果。This work investigated the kinetics of WGSR of sulfur-containing syngas over an industrial spherical CoMo catalyst using a fixed-bed reactor under the total pressure of 150 kPa and the differential reaction condition.The power-law reaction rate model has been established.Statistical test shows that the relationships between the reaction rates and the model parameters are highly significant.The reaction activation energy for this catalyst is 37.66 kJ/mol,which is lower than that reported in the literature.The reaction orders of CO and H 2 O are 1.94 and 0.59,respectively,both of which are higher than the literature values.The reaction rates calculated from the model are in good agreement with the experimental values.X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)were used to characterize the catalysts.A plausible catalytic reaction mechanism was proposed to explain the high CO reaction order obtained from this experiment.

关 键 词：含硫原料气 水煤气变换 钴钼催化剂 动力学 催化机理 

分 类 号：TQ116.2[化学工程—无机化工]