基于甲烷化反应的催化剂颗粒设计与过程强化  

Process intensification and catalysts particle design for CO methanation

作　　者：李军[1] 朱庆山[1] 李洪钟[1] 

机构地区：[1]中国科学院过程工程研究所多相复杂系统国家重点实验室,北京100190

出　　处：《化工学报》2015年第8期2773-2783,共11页CIESC Journal

基　　金：国家自然科学基金项目(91334108);国家重大科学仪器设备开发专项项目(2011YQ12003908)~~

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。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 techniquesvia fluidized bed reactors.

关 键 词：甲烷化 流化床反应器 强放热 减分子 镍催化剂 积炭 

分 类 号：TQ032.4[化学工程]