Effects of supports and combined process on hydrogen purification over nickel supported catalysts

作     者：Menglan Xiao Lu Zhang Yanyan Sang Zhiming Gao Menglan Xiao;Lu Zhang;Yanyan Sang;Zhiming Gao

作者机构：School of Chemistry and Chemical EngineeringBeijing Institute of Technology 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2020年第38卷第1期

页      面：52-58页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China(21643008) 

主　　题：Hydrogen purification Methanation Nickel catalyst Support effect Rare earths 

摘      要：Hydrogen purification must be done to meet the different purposes of hydrogen *** the present work,it is confirmed that the catalyst Ni/CeO2 has the highest activity for total methanation(Total MET) of CO and CO2,and is thus most suitable for hydrogen purification for ammonia ***,the catalyst Ni/ZrO2 appears the best one for selective methanation of CO(CO-SMET) in the H2-rich gas to produce clean fuel for proton exchange membrane fuel cell(PEMFC).In spite of this,the catalyst Ni/ZrO2 without adding chlorine ions as promoter is not yet capable of removing the CO in the reformate gas to below 10 ppm in a wide reaction temperature range by the way of *** chlorine ions as promoter is indeed not favorable for practical application due to its gradual loss in the catalytic reaction as proved in our previous ***,a step to decrease CO2 concentration(called as de-CO2 step) is suggested to be set prior to the CO-SMET step in this *** is proved that such combination of de-CO2 step and CO-SMET step is efficient to achieve a deep removal of CO to below 10 ppm with a high selectivity more than 50% in a wide reaction temperature range of 220-280℃over the catalyst Ni/ZrO2 without adding chlorine ions as *** combined process has potential for practical application,at least in the large-scale power plant of PEMFC.