Ni/Al2O3 catalysts: effects of the promoters Ce, La and Zr on the methane steam and oxidative reforming reactions

The influence of the promoters CeO2, CeO2–ZrO2 and CeO2–La2O3 on the reactivity of γ-Al2O3 supported nickel catalysts from steam and oxidative reforming of methane was investigated in this study. At temperatures above 500 °C, promoted catalysts showed the best performance in the methane oxidative reforming reaction. The increase in activity can be attributed to the specific catalyst–promoter interactions such as the capacity of CeO2 to store and release oxygen and the influence of La2O3 on the stability of the support. Below 500 °C, the activity of the catalyst may be related more directly to the exposed metal surface area.

[1]  R. D. Ramsier,et al.  Surface chemistry of zirconium , 2005 .

[2]  Caine M. Finnerty,et al.  REFORMING CATALYSTS FOR HYDROGEN GENERATION IN FUEL CELL APPLICATIONS , 2006 .

[3]  N. Radwan.  Influence of La2O3 and ZrO2 as promoters on surface and catalytic properties of CuO/MgO system prepared by sol–gel method , 2006 .

[4]  K. Jun,et al.  Highly active and stable Ni/Ce-ZrO2 catalyst for H2 production from methane , 2002 .

[5]  F. Cavani,et al.  The effect of doping CeO2 with zirconium in the oxidation of isobutane , 1996 .

[6]  Jun Wang,et al.  Partial oxidation of methane on Ni/CeO2-ZrO2/γ-Al2O3 prepared using different processes , 2008 .

[7]  Hui Lou,et al.  Deactivation of Ni catalysts during methane autothermal reforming with CO2 and O2 in a fluidized-bed reactor , 2007 .

[8]  S. Soloviev,et al.  Effect of rare-earth element oxides (La2O3, Ce2O3) on the structural and physico-chemical characteristics of Pd/Al2O3 monolithic catalysts of nitrogen oxide reduction by methane , 2007 .

[9]  Mario Conte,et al.  Hydrogen economy for a sustainable development: state-of-the-art and technological perspectives , 2001 .

[10]  R. Faccio,et al.  The preparation and properties of Ni–La–Zr catalysts for the steam reforming of ethanol , 2008 .

[11]  J. Armor,et al.  The multiple roles for catalysis in the production of H2 , 1999 .

[12]  M. Gong,et al.  CeO2-ZrO2-La2O3-Al2O3 composite oxide and its supported palladium catalyst for the treatment of exhaust of natural gas engined vehicles , 2009 .

[13]  A. J. Assis,et al.  Hydrogen production from oxidative reforming of methane on supported nickel catalysts: An experimental and modeling study , 2012 .

[14]  Ryuji Kikuchi,et al.  Catalytic autothermal reforming of methane and propane over supported metal catalysts , 2003 .

[15]  J. Fierro,et al.  Hydrogen production by oxidative reforming of hexadecane over Ni and Pt catalysts supported on Ce/La-doped Al2O3 , 2006 .

[16]  José Mansur Assaf,et al.  Autothermal reforming of methane over Ni/γ-Al2O3 catalysts: the enhancement effect of small quantities of noble metals , 2004 .

[17]  A. Trovarelli,et al.  Catalytic Properties of Ceria and CeO2-Containing Materials , 1996 .

[18]  Lars J. Pettersson,et al.  Autothermal reforming of low-sulfur diesel over bimetallic RhPt supported on Al2O3, CeO2–ZrO2, SiO2 and TiO2 , 2011 .

[19]  David L. Trimm,et al.  ONBOARD FUEL CONVERSION FOR HYDROGEN-FUEL-CELL-DRIVEN VEHICLES , 2001 .

[20]  Xiulan Cai,et al.  Autothermal Reforming of Methane over Ni Catalysts Supported on CuO-ZrO2-CeO2-Al2O3 , 2006 .

[21]  Fortunato Migliardini,et al.  Hydrogen production by catalytic partial oxidation of methane and propane on Ni and Pt catalysts , 2007 .

[22]  S. Therdthianwong,et al.  Oxidative steam reforming of ethanol over Ni/Al2O3 catalysts promoted by CeO2, ZrO2 and CeO2–ZrO2 , 2009 .

[23]  Ulf Schuchardt,et al.  The effects of La2O3 on the structural properties of La2O3–Al2O3 prepared by the sol–gel method and on the catalytic performance of Pt/La2O3–Al2O3 towards steam reforming and partial oxidation of methane , 2008 .

[24]  J. Fierro,et al.  Ethanol steam reforming over Ni/MxOy–Al2O3 (M=Ce, La, Zr and Mg) catalysts: Influence of support on the hydrogen production , 2007 .

[25]  Mauro Graziani,et al.  Use of CeO2-based oxides in the three-way catalysis , 1999 .

[26]  J. Zieliński,et al.  The effect of cerium, lanthanum and zirconium on nickel/alumina catalysts for the hydrogenation of carbon oxides , 2005 .

[27]  G. Bond,et al.  Catalysis by metals and alloys , 1995 .