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在工业催化剂上水煤气变换反应宏观动力学
引用本文:李绍芬,刘邦荣,高文新,廖晖. 在工业催化剂上水煤气变换反应宏观动力学[J]. 化工学报, 1984, 35(4): 303-310
作者姓名:李绍芬  刘邦荣  高文新  廖晖
作者单位:天津大学化学工程系,天津大学化学工程系,天津大学化学工程系,天津大学化学工程系
摘    要:用内循环式无梯度反应器,在不同的反应条件下,测定了B106及B109两种型号的原粒度工业变换催化剂的宏观反应速率.根据实验数据关联出两种催化剂都适用的宏观动力学方程,求定了相应的模型参数.该式可用以模拟工业变换反应器.此外,并由实验数据计算了各种情况下的有效因子.整个实验及计算结果表明,这两种催化剂对气体的内扩散阻力都是相当大的.


Macrokinetics of water Gas Shift Reaction on Commercial Catalysts
Li Shaofen,Liu Bangrong,Gao wenxin and Liao Hui. Macrokinetics of water Gas Shift Reaction on Commercial Catalysts[J]. Journal of Chemical Industry and Engineering(China), 1984, 35(4): 303-310
Authors:Li Shaofen  Liu Bangrong  Gao wenxin  Liao Hui
Affiliation:Li Shaofen,Liu Bangrong,Gao wenxin and Liao HuiDepartment of Chemical Engineering,Tianjin University
Abstract:This paper deals with the macrokinetics of water gas shift reaction on commercial iron oxide catalysts. In an internal recycle gradientless reactor, type B106 and B109 shift catalysts of commercial size and cylindrical in shape, have been studied under atmospheric pressure. Reaction conditions were: temperature 350° to 480℃, molar ratio of steam to carbon monoxide 2 to 11, dry gas space velocity 150 to 1500ml/(h. g). Experimental results showed that the macrokinetic equations for both catalysts can be expressed by the common formula:where pco, pH2o> pco2 and pH2 are the partial pressures of carbon monoxide, steam, carbon dioxide and hydrogen, respectively, KP the equilibrium constant of water gas shift reaction, k* the apparent rate constant. This equation can be used in the simulation of commercial shift converters. The apparent activation energy of B106 catalyst is 14,570 cal/mol and that of B109 catalyst, 16,200 cal/mol. They are approximately one half the corresponding intrinsic activation energy values, suggesting that the water gas shift reaction process is severely limited by intraparticle diffusion on the other hand, the effectiveness factors for both catalysts, as calculated by use of the experimental results and the intrinsic rates indicate that the apparent activity is much lower than the intrinsic activity, hence pointing out the importance of improving the pore structure and geometry of commercial shift catalysts.
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