Hydrogen production by auto-thermal reforming of ethanol over nickel catalysts supported on metal oxides: Effect of support acidity

Abstract Nickel catalysts supported on pure metal oxides (ZnO, MgO, ZrO2, TiO2, and Al2O3) with different acidity were prepared by an incipient wetness impregnation method, and they were applied to the hydrogen production by auto-thermal reforming of ethanol. The effect of support acidity on the catalytic performance of supported nickel catalysts was investigated. It was revealed that acidity of support played an important role in determining the reaction pathway and catalytic performance in the auto-thermal reforming of ethanol. Among various pure metal oxides, ZrO2 and TiO2 with an intermediate acidity were found to be efficient supporting materials for nickel catalysts in the auto-thermal reforming of ethanol. On the basis of this result, a series of TiO2–ZrO2 mixed metal oxides (TiXZr1−XO2) with different Ti content (X) were prepared by a sol–gel method for use as supporting materials for nickel catalysts. In hydrogen production by auto-thermal reforming of ethanol, an optimal Ti content was required for suitable acidity of TiXZr1−XO2 support and favorable reducibility of Ni/TiXZr1−XO2 catalyst. Hydrogen yield over nickel catalysts supported on metal oxides showed a volcano-shaped curve with respect to acidity of the support. Among the catalysts tested, Ni/Ti0.2Zr0.8O2 with an intermediate acidity of support exhibited the best catalytic performance.

[1]  Y. S. Lin,et al.  Structural and surface chemical properties of sol–gel derived TiO2–ZrO2 oxides , 2004 .

[2]  Xiaolai Wang,et al.  Highly active and coking resistant Ni/CeO2–ZrO2 catalyst for partial oxidation of methane , 2005 .

[3]  J. Yates,et al.  Photocatalysis on TiO2 Surfaces: Principles, Mechanisms, and Selected Results , 1995 .

[4]  P. Smirniotis,et al.  An XPS study of the dispersion of MoO3 on TiO2–ZrO2, TiO2–SiO2, TiO2–Al2O3, SiO2–ZrO2, and SiO2–TiO2–ZrO2 mixed oxides , 2001 .

[5]  J. Sohn,et al.  Effect of TiO2–ZrO2 composition on catalytic activity of supported NiSO4 for ethylene dimerization , 2007 .

[6]  A. Lin,et al.  Ti1-xZrxO2 Solid Solutions for the Photocatalytic Degradation of Acetone in Air , 1998 .

[7]  Y. Matsumura,et al.  Steam reforming of methane over nickel catalysts at low reaction temperature , 2004 .

[8]  I. Wang,et al.  Nonoxidative dehydrogenation of ethylbenzene over TiO2ZrO2 catalysts: II. The effect of pretreatment on surface properties and catalytic activities , 1984 .

[9]  M. Engelhard,et al.  Effects of nanocrystalline CeO2 supports on the properties and performance of Ni–Rh bimetallic catalyst for oxidative steam reforming of ethanol , 2006 .

[10]  H. Wan,et al.  Partial oxidation of methane to hydrogen and carbon monoxide over a Ni/TiO2 catalyst , 2005 .

[11]  D. Leung,et al.  A review on reforming bio-ethanol for hydrogen production , 2007 .

[12]  E. Assaf,et al.  Production of hydrogen via steam reforming of biofuels on Ni/CeO2–Al2O3 catalysts promoted by noble metals , 2009 .

[13]  M. Laniecki,et al.  Water–gas shift reaction over sulfided molybdenum catalysts supported on TiO2–ZrO2 mixed oxides: Support characterization and catalytic activity , 2006 .

[14]  Qiang Xu,et al.  Surface characterization of sulfate, molybdate, and tungstate promoted TiO2-ZrO2 solid acid catalysts by XPS and other techniques , 2002 .

[15]  Gao Qing Lu,et al.  CO2 reforming of methane on Ni catalysts: Effects of the support phase and preparation technique , 1998 .

[16]  M. Lü,et al.  Preparation and photocatalytic properties of Zr4+-doped TiO2 nanocrystals , 2004 .

[17]  Pil Kim,et al.  Hydrogen production by auto-thermal reforming of ethanol over Ni/γ-Al2O3 catalysts: Effect of second metal addition , 2006 .

[18]  In Kyu Song,et al.  Effect of support on hydrogen production by auto-thermal reforming of ethanol over supported nickel catalysts , 2008 .

[19]  Howon Lee,et al.  Hydrogen production by steam reforming of LNG over Ni/Al2O3-ZrO2 catalysts: Effect of ZrO2 and preparation method of Al2O3-ZrO2 , 2008 .

[20]  Suttichai Assabumrungrat,et al.  Steam reforming of ethanol with co-fed oxygen and hydrogen over Ni on high surface area ceria support , 2007 .

[21]  J. Nakamura,et al.  Growth mode of carbide from C2H4 or CO on Ni(1 1 1) , 2002 .

[22]  B. Fubini,et al.  Development and suppression of surface acidity on monoclinic zirconia: A spectroscopic and calorimetric investigation , 1990 .

[23]  Yuhan Sun,et al.  Support effect of Co/Al2O3 catalysts for Fischer–Tropsch synthesis☆ , 2003 .

[24]  Viktor Hacker,et al.  Hydrogen for fuel cells from ethanol by steam-reforming, partial-oxidation and combined auto-thermal reforming: A thermodynamic analysis , 2008 .

[25]  Xenophon E. Verykios,et al.  Production of hydrogen for fuel cells by steam reforming of ethanol over supported noble metal catalysts , 2003 .

[26]  X. Verykios,et al.  Production of hydrogen for fuel cells by reformation of biomass-derived ethanol , 2002 .

[27]  Walter Seifritz.  The self-criticality problem of any new CO2-free energy system replacing fossil fuels , 2005 .

[28]  D. Kunzru,et al.  Steam reforming of ethanol for production of hydrogen over Ni/CeO2–ZrO2 catalyst: Effect of support and metal loading , 2007 .

[29]  Jianxin Ma,et al.  Production of hydrogen by steam reforming of ethanol over a Ni/ZnO catalyst , 2006 .

[30]  Hong Li,et al.  H2 production from stable ethanol steam reforming over catalyst of NiO based on flowerlike CeO2 microspheres , 2010 .

[31]  R. Borup,et al.  Generating hydrogen-rich fuel-cell feeds from dimethyl ether (DME) using physical mixtures of a commercial Cu/Zn/Al2O3 catalyst and several solid-acid catalysts , 2006 .

[32]  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 .

[33]  Xenophon E. Verykios,et al.  Reaction network of steam reforming of ethanol over Ni-based catalysts , 2004 .

[34]  I. Song,et al.  Hydrogen production by auto-thermal reforming of ethanol over Ni catalyst supported on ZrO2 prepared by a sol–gel method: Effect of H2O/P123 mass ratio in the preparation of ZrO2 , 2009 .

[35]  G. Bonura,et al.  Steam and auto-thermal reforming of bio-ethanol over MgO and CeO2 Ni supported catalysts , 2006 .

[36]  M. Cantão,et al.  Bimetallic catalysts performance during ethanol steam reforming: Influence of support materials , 2009 .

[37]  L. Kustov,et al.  Effects of the support on the morphology and electronic properties of supported metal clusters : modern concepts and progress in 1990s , 1999 .

[38]  K. Hidajat,et al.  A crucial role of surface oxygen mobility on nanocrystalline Y2O3 support for oxidative steam reforming of ethanol to hydrogen over Ni/Y2O3 catalysts , 2008 .

[39]  P. Moriarty,et al.  Intermittent renewable energy: The only future source of hydrogen? , 2007 .

[40]  J. N. Russell,et al.  Bond activation sequence observed in the chemisorption and surface reaction of ethanol on Ni(111) , 1986 .

[41]  E. Assaf,et al.  Hydrogen production by steam reforming of ethanol over Ni-based catalysts promoted with noble metals , 2009 .

[42]  R. Gómez,et al.  Preparation of TiO2-ZrO2 mixed oxides with controlled acid-basic properties , 2004 .

[43]  D. Kunzru,et al.  Oxidative steam reforming of ethanol over Ni/CeO2-ZrO2 catalyst , 2008 .

[44]  Y. Matsumura,et al.  Design of TiO2-SiC photocatalyst using TiC-SiC nano-particles for degradation of 2-propanol diluted in water , 2007 .

[45]  Pil Kim,et al.  Role and effect of molybdenum on the performance of Ni-Mo/γ-Al2O3 catalysts in the hydrogen production by auto-thermal reforming of ethanol , 2007 .

[46]  I. Song,et al.  Effect of Al2O3-ZrO2 xerogel support on hydrogen production by steam reforming of LNG over Ni/Al2O3-ZrO2 catalyst , 2008 .

[47]  F. Frusteri,et al.  Production of hydrogen for MC fuel cell by steam reforming of ethanol over MgO supported Ni and Co catalysts , 2003 .