The promoting effect of Ce in the CO₂ methanation performances on NiUSY zeolite: A FTIR In Situ/Operando study

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• 作者：A. Westermann^a ; ^{alexandre.westermann@ircelyon.univ-lyon1.fr} ; B. Azambre^b ; M.C. Bacariza^a ; I. Graç ; a^a ; M.F. Ribeiro^a ; J.M. Lopes^a ; C. Henriques^a ; ^{carlos.henriques@ist.utl.pt}
• 关键词：FTIR spectroscopy ; Ce&ndash ; Ni-based zeolite ; Methane ; Formates ; Carbonates
• 刊名：Catalysis Today
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：283
• 期：Complete
• 页码：74-81
• 全文大小：1118 K
• 卷排序：283

文摘

Ce is present as well dispersed CeO2 and Ni as Ni° particles after pre-treatment. CO2 adsorption capacity increases drastically after Ce addition on NiUSY catalyst. Hydrogen and bidentate carbonates appear to be the reactive species leading to formate. Adsorbed formates seem to be the “true” intermediate involved in the reaction pathway. The mechanism on NiCeUSY does not pass through the formation of CO.