La-enhanced Ni nanoparticles highly dispersed on SiC for low-temperature CO methanation performance  

作　　者：Jiang-Wei Li Qi Song Jiang-Bing Li Sheng-Chao Yang Yan-Shan Gao Qiang Wang Feng Yu 

机构地区：[1]Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan,School of Chemistry and Chemical Engineering,Shihezi University,Shihezi 832003,China [2]Environmental Functional Nanomaterials(EFN)Laboratory,College of Environmental Science and Engineering,Beijing Forestry University,Beijing 100083,China

出　　处：《Rare Metals》2021年第7期1753-1761,共9页稀有金属（英文版）

基　　金：the International Science and Technology Cooperation Project of Shihezi University(No.GJHZ201804);the International Science and Technology Cooperation Project of Bingtuan(No.2018BC002)。

摘　　要：For better performances of Ni-based catalysts at low temperatures,Ni/SiC catalyst doped with a little amount of additive La was successfully prepared.The catalytic CO methanation activity tests showed that 3%La-Ni/SiC catalyst was excellent at a low reaction temperature(95.9%CO conversion and 85.1%CH4 selectivity at250℃)with a superior stability compared with Ni/SiC(3.4%CO conversion and 0%CH4 selectivity at 250℃).This can be attributed to that the addition of La can markedly improve the dispersibility of active metal Ni and reduce the particle sizes of Ni nanoparticles or clusters,and can also regulate the interaction between active components and supports.Moreover,the high thermal conductivity and thermal stability could avoid the generation of hot spots in the catalyst bed.These results will promote the development of highly active Ni-based catalysts for the low-temperature methanation reaction.

关 键 词：Silicon carbide Rare-earth promoter Synthetic natural gas Hydrogen energy Carbon monoxide methanation 

分 类 号：X701[环境科学与工程—环境工程] TQ221.11[化学工程—有机化工] TQ426