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.

引用

页数：5

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