Abstract: A kinetic study of CO-methanation has been carried out in a gradi-entless reactor with two commercial catalysts R and G, which have different pore structures but similar compositions, in the temperature range of from 190 to 270℃, under a total pressure of 16 bar, with mole ratio N2/H2 = 110.33 - 3, volumetric flow rate of 80 - 120 Nl/h, and CO-concentration in the reactor xco, e=3%. Experimental results can be formulated by a Langmuir-Hinshelwood type model as follows: By comparision, it was found that these two catalysts had obviously different activities, attributable to their different pore structures and diffusion properties. During experimentation, concentration oscillations of the reacting species were observed.

摘要： 对于两种工业催化剂(具有不同的孔结构但类似的组成),在190至270℃,总压力16×10~5Pa,N_2/H_2克分子比1:0.33～3,体积流速80～120Nl/h,反应器中一氧化碳浓度低于3%的范围内,在内循环式无梯度反应器中进行了一系列一氧化碳甲烷化动力学实验,实验结果可统一地用L-H模型表示如下:γ=kx_CO~0.5·x_H_2~(0.5)/1+K_CO~x_CO但通过比较看出,这两种催化剂有明显不同的催化活性,这可以归结于它们的孔结构与扩散性能的差异.实验中还观察到反应组成物的浓度振荡现象.