A DRIFTS and TPD study on the methanation of CO2 on Ni/Al2O3 catalyst

被引：35
|
作者：
Schreiter, Norman [1 ]
Kirchner, Johann [1 ]
Kureti, Sven [1 ]
机构：
[1] Tech Univ Freiberg, Inst Energy Proc Engn & Chem Engn, Chair React Engn, Fuchsmuehlenweg 9, D-09599 Freiberg, Germany
来源：
CATALYSIS COMMUNICATIONS | 2020年 / 140卷
关键词：
CO2; methanation; Nickel catalyst; Reaction mechanism; CARBON-DIOXIDE; METHANOL SYNTHESIS; NICKEL; HYDROGENATION; ADSORPTION; KINETICS; SURFACE; NI(110); INSIGHT;
D O I：
10.1016/j.catcom.2020.105988
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This study deals with the hydrogenation of CO2 into CH4 and H2O on an Al2O3 -supported Ni catalyst with Ni content of 20 wt%. CO2 adsorbates were identified by DRIFTS and CO2-TPD mainly showing the formation of carbonate and carboxylate species. Exposure to H-2 indicates that hydrogen carbonate present on the support as well as carbonate presumably adsorbed at the Ni-Al2O3 interface are reactive intermediates in the methanation. Contrary, carboxylate also adsorbed on Ni as well as formate species are acing as spectators.
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页数：5
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