Dry reforming of methane over Ni/Ce_0.62Zr_0.38O₂ catalysts: Effect of Ni loading on the catalytic activity and on H₂/CO production

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• 作者：Monika Radlik^a ; ^{monika.radlik@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Małgorzata Adamowska-Teyssier^b ; ^c ; Andrzej Krztoń^d ; Krzysztof Kozieł^a ; Waldemar Krajewski^e ; Wincenty Turek^a ; Patrick Da Costa^b ; ^c
• 关键词：Methane ; Hydrogen ; Dry reforming ; Ceria&ndash ; zirconia ; Nickel loading
• 刊名：Comptes Rendus Chimie
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：18
• 期：11
• 页码：1242-1249
• 全文大小：1761 K

文摘

The activity of ceria–zirconia-supported nickel catalysts (Ni/CZ) with various loadings of nickel (2, 4 and 10 wt. %) was studied in the case of low-temperature dry reforming of methane (DRM). XRD, S_BET, SEM, TPD-CO₂ and thermogravimetry were used to determine the physicochemical properties of the catalysts and of the carbon deposits formed on the surface. It was found that the agglomerates of the Ni-active phase are formed on the surface of the support for high loadings of nickel. The best conversions of CO₂ and CH₄ and an optimum ratio H₂/CO = 1 were obtained for the catalysts with the highest Ni content. It was also found that loading has an influence on the amount of carbon deposits formed in the DRM process.