Selective CO methanation over amorphous Ni-Ru-B/ZrO_2 catalyst for hydrogen-rich gas purification  

作　　者：Qihai Liu Zili Liu LieWen Liao Xinfa Dong 

机构地区：[1]School of Chemistry and Chemical Engineering, Zhongkai university of agriculture and engineering, Guangzhou 510225, Guangdong, China [2]Guangzhou university, Guangzhou 510006, Guangdong, China [3]School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China

出　　处：《Journal of Natural Gas Chemistry》2010年第5期497-502,共6页天然气化学杂志（英文版）

基　　金：supported by the National Natural Science Foundation of China (No: 20576023);the Guangdong Province Natural Science Foundation(No: 06025660);the Natural Science Foundation of Zhongkai University of Agriculture and Engineering (G3100026)

摘　　要：Amorphous Ni-Ru-B/ZrO2 catalysts were prepared by chemical reduction method. The effects of Ni-Ru-B loading and Ru/Ni mole ratio on the catalytic performance for selective CO methanation from reformed fuel were studied, and the catalysts were characterized by BET, ICP, XRD and TPD. The results showed that Ru strongly affected the catalytic activity and selectivity by increasing the thermal stability of amorphous structure, promoting the dispersion of the catalyst particle, and intensifying the CO adsorption. For the catalysts with Ru/Ni mole ratio under 0.15, the CO methanation conversion and selectivity increased significantly with the increasing Ru/Ni mole ratio. Among all the catalysts investigated, the 30 wt% Ni-Ru-B loading amorphous Ni61Ru9B30/ZrO2 catalyst with 0.15 Ru/Ni mole ratio presented the best catalytic performance, over which higher than 99.9% of CO conversion was obtained in the temperature range of 230℃-250℃, and the CO2 conversion was kept under the level of 0.9%.Amorphous Ni-Ru-B/ZrO2 catalysts were prepared by chemical reduction method. The effects of Ni-Ru-B loading and Ru/Ni mole ratio on the catalytic performance for selective CO methanation from reformed fuel were studied, and the catalysts were characterized by BET, ICP, XRD and TPD. The results showed that Ru strongly affected the catalytic activity and selectivity by increasing the thermal stability of amorphous structure, promoting the dispersion of the catalyst particle, and intensifying the CO adsorption. For the catalysts with Ru/Ni mole ratio under 0.15, the CO methanation conversion and selectivity increased significantly with the increasing Ru/Ni mole ratio. Among all the catalysts investigated, the 30 wt% Ni-Ru-B loading amorphous Ni61Ru9B30/ZrO2 catalyst with 0.15 Ru/Ni mole ratio presented the best catalytic performance, over which higher than 99.9% of CO conversion was obtained in the temperature range of 230℃-250℃, and the CO2 conversion was kept under the level of 0.9%.

关 键 词：selective methanation CO hydrogen purification AMORPHOUS Ni-Ru-B/ZrO2 catalyst 

分 类 号：O643.36[理学—物理化学] TQ426.96[理学—化学]