Effect of ZrOb>2b> addition on Ni/Alb>2b>Ob>3b> catalyst to produce Hb>2b> from glycerol

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• 作者：A. Iriondo^a ; ^{aitziber.iriondo@ehu.es} ; J.F. Cambra^a ; M.B. Gü ; emez^a ; V.L. Barrio^a ; J. Requies^a ; M.C. Sá ; nchez-Sá ; nchez^b ; R.M. Navarro^b
• 关键词：Zirconium oxide ; Nickel ; Glycerol ; Steam reforming ; Hydrogen
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：8
• 页码：7084-7093
• 文件大小：930 K

摘要

In this work, ZrOb>2b> was employed as support and as Alb>2b>Ob>3b> modifier of Ni based catalysts due to its special interesting characteristics. The catalytic activity of these systems was studied in steam reforming of glycerol to produce Hb>2b>. As the activity results at 773聽K and 873聽K showed, the NiZ catalyst allowed low glycerol conversion and Hb>2b> production when compared to the Ni纬A catalyst. Moreover, the NiZ catalyst was not able to reform intermediate liquid products into gaseous products.

The behaviour of the Ni纬A catalyst was improved when an intermediate content of ZrOb>2b> was added to Alb>2b>Ob>3b>, resulting in higher Hb>2b>鈥?yield and capacity to reform intermediate products even at 773聽K. This improvement seems to be related to a larger proportion of surface Ni掳 species (XPS). This Ni掳 proportion increase could be attributed to the formation of ZrOb>2b>-Alb>2b>Ob>3b> species. These species decreased Ni²⁺ species reduction temperature, favouring Ni²⁺聽鈫捖燦i掳 transformation.