沈阳农业大学学报2017，Vol.48Issue(4)：488-496,9.DOI:10.3969/j.issn.1000-1700.2017.04.017
生物质合成气甲烷化催化剂研究进展
Research Advances in Methanation Catalysts for Bio-Syngas
摘要
Abstract
Natural gas occupies an important position in China's future energy system. The conversion of syngas to natural gas via methanation is a useful way to convert biomass energy into hydrogen-rich and low-carbon energy by using biomass as raw material. In this paper, the progress of methanation catalysts of bio-syngas was summarized. The effects of different active components (Ni, Co, Ru, etc.) on the catalytic performance of CO and CO2 methanation catalysts were discussed, and the effects of catalyst carriers with different structures (Al2O3, ZrO2, TiO2, SiO2, etc.) which can provide different dispersion degrees and particle sizes of the active components were expounded. The effects of different types of additives (MgO,La2O3,CeO2,etc.) and different preparation methods (Impregnation, Coprecipitation, Sol-gel method, etc.)on the catalytic performance of the catalyst were analyzed. This paper also introduced some new types of catalyst carriers and the characteristics of catalyst preparation methods, and pointed out the research targets and the main problems of the existing methanation catalysts. The ideal methanation catalysts should have good catalytic activity at low reaction temperature and good stability at high reaction temperature, with good active components dispersion and smaller particle size, and have good resistance to carbon deposition. However, the methanation reaction releases a large amount of heat, which leads to the removal and aggregation of the active components on the catalyst and carbon deposition on the active site surface, resulting in the deactivation of the catalyst. Therefore, it is necessary to improve the performance of the methanation catalysts by developing bimetallic or polymetallic catalysts, improving or developing catalyst carriers with good pore structure and surface area, adding different functional structural additives or electronic additives, improving the preparation methods of the catalyst or other means, to increase the dispersion and decrease the particle size of the active component, and finally improve the catalytic activity, thermal stability and carbon deposition resistance of the methanation catalysts. It is believed that the mechanism of CO and CO2 methanation reaction, the preparation process of new composite carriers, the interaction mechanism between active component and additives or carriers, the deactivation mechanism of catalyst and the regeneration performance should be studied in depth, and the catalysts with high catalytic performance should be designed and developed.关键词
生物质/合成气/甲烷化/催化剂/研究进展Key words
biomass/syngas/methanation/catalysts/research progress分类
能源科技引用本文复制引用
符世龙,陈应泉,杨海平..生物质合成气甲烷化催化剂研究进展[J].沈阳农业大学学报,2017,48(4):488-496,9.基金项目
公益性行业(农业)科研专项项目(201303095) （农业）
国家自然科学基金项目(51576088,51622604) （51576088,51622604）
