Recent advances in methanation catalysts for the production of synthetic natural gas
Recent advances in methanation catalysts for the production of synthetic natural gas
复制标题
用于生产合成天然气的甲烷化催化剂的最新进展
DOI：
10.1039/c4ra16114a
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Su, Fabing
中科院分区：
文献类型：
--
作者：
Gao, Jiajian;Liu, Qing;Su, Fabing
由于能源问题和通过二氧化碳转化减少温室气体的机会，用于生产合成天然气（SNG）的煤或生物质衍生碳氧化物的甲烷化引起了人们极大的兴趣。甲烷化过程的关键组成部分是催化剂设计。理想情况下，催化剂应在低温（200-300℃）下表现出高活性，在高温（600-700℃）下表现出高稳定性。近几十年来，人们对各种甲烷化催化剂进行了研究，其中分散在Al2O3、SiO2、TiO2、ZrO2、CeO2等金属氧化物载体上的Ni、Fe、Co、Ru、Mo等过渡金属因其较高的催化活性和选择性而受到广泛关注。此外，在过去的几年里，人们在甲烷化催化剂的开发和反应机理研究方面做出了巨大的努力。在这里，我们对这些最新进展进行了全面的回顾，涵盖了反应热力学、机理和动力学、催化剂活性组分的影响、载体、促进剂和制备方法，希望为未来用于煤制天然气生产的甲烷化催化剂设计和开发提供途径。
Methanation of coal-or biomass-derived carbon oxides for production of synthetic natural gas (SNG) is gaining considerable interest due to energy issues and the opportunity of reducing greenhouse gases by carbon dioxide conversion. The key component of the methanation process is the catalyst design. Ideally, the catalyst should show high activity at low temperatures (200-300 degrees C) and high stability at high temperatures (600-700 degrees C). In the past decades, various methanation catalysts have been investigated, among which transition metals including Ni, Fe, Co, Ru, Mo, etc. dispersed on metal oxide supports such as Al2O3, SiO2, TiO2, ZrO2, CeO2 etc. have received great attention due to their relatively high catalytic activity and selectivity. Furthermore, over the past few years, great efforts have been made both in methanation catalysts development and reaction mechanism investigation. Here we provide a comprehensive review to these most advancements, covering the reaction thermodynamics, mechanism and kinetics, the effects of catalyst active components, supports, promoters and preparation methods, hoping to outline the pathways for the future methanation catalysts design and development for SNG production.