基于甲烷化反应的催化剂颗粒设计与过程强化

doi:10.11949/j.issn.0438-1157.20150748

摘要/Abstract

摘要：

甲烷化反应过程的主要问题是“烧结”和“积炭”。基于甲烷化反应的强放热、减分子特性和对反应机理的认识,从催化剂与反应器的匹配性角度,论述了当前的主要甲烷化工艺、甲烷化催化剂、甲烷化反应及过程强化方法。流化床技术可有效防止催化剂的积炭和烧结,从与流化床反应器匹配的催化剂结构设计源头出发,制备具有耐磨损、易流化、低密度的高活性甲烷化催化剂,是流化床甲烷化发展的一个重要途径。

关键词: 甲烷化, 流化床反应器, 强放热, 减分子, 镍催化剂, 积炭

Abstract:

Carbon deposition and sintering of metal particles are the two dominating reasons for deactivation of the methanation catalyst. Based on the strong exothermic reaction accompanied by a large decrease in mole number and methanation mechanism, from the perspective of the matching of catalyst and reactor, this paper summarizes the development of main CO methanation techniques, CO methanation catalysts, reaction mechanism of CO methanation and its process intensifications. Fluidized bed reactors have the advantages in preventing the carbon deposition and sintering of Ni catalysts. Thus, the design of wear-resistant, easy fluidized and low density catalyst structure particles that applicable to fluidized bed reactors should be a feasible way and the new direction for the development of methanation techniques via fluidized bed reactors.

Key words: methanation, fluidized bed reactor, strong exothermic, molecular reduction, Ni catalyst, carbon deposition

中图分类号:

TQ032.4

李军, 朱庆山, 李洪钟. 基于甲烷化反应的催化剂颗粒设计与过程强化[J]. 化工学报, 2015, 66(8): 2773-2783.

LI Jun, ZHU Qingshan, LI Hongzhong. Process intensification and catalysts particle design for CO methanation[J]. CIESC Journal, 2015, 66(8): 2773-2783.

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