A Kinetic Study of Carbon Monoxide Methanation in a Gradientless Reactor with Internal Recycle

Zhang Jiyan H. Hofmann(Department of Chemical Engineering; Tianjin University) (Institut fur Technische Chemie I der Universitut Erlangen-Nurnberg)

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A Kinetic Study of Carbon Monoxide Methanation in a Gradientless Reactor with Internal Recycle

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- A Kinetic Study of Carbon Monoxide Methanation in a Gradientless Reactor with Internal Recycle
- CIESC Journal Issue 2, (1986)
- 作者机构：
  
  天津大学化工系,联邦德国埃尔兰根-纽伦堡大学第一化工研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 June 1986，
  
  Published：25 June 1986
- 稿件说明：
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Zhang Jiyan H. Hofmann(Department of Chemical Engineering, Tianjin University) (Institut fur Technische Chemie I der Universitut Erlangen-Nurnberg). A Kinetic Study of Carbon Monoxide Methanation in a Gradientless Reactor with Internal Recycle[J]. CIESC Journal, 1986, (2).
DOI：

Zhang Jiyan H. Hofmann(Department of Chemical Engineering, Tianjin University) (Institut fur Technische Chemie I der Universitut Erlangen-Nurnberg). A Kinetic Study of Carbon Monoxide Methanation in a Gradientless Reactor with Internal Recycle[J]. CIESC Journal, 1986, (2). DOI：

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.

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.

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