Steam reforming of biomass gasification tar using benzene as a model compound over various Ni supported metal oxide catalysts.

The steam reforming of benzene as a model compound of biomass gasification tar was carried out over various Ni/metal oxide catalysts. The effects of the support, temperature, Ni-precursor, Ni loading and reaction time were examined, and their catalytic performance was compared with that of a commercial Ni catalyst. Among the Ni/metal oxide catalysts used, 15 wt% Ni/CeO(2)(75%)-ZrO(2)(25%) showed the highest catalytic performance owing to its greater redox characteristics and increased surface area, irrespective of the reaction temperature. The catalytic activity of 15 wt% Ni/CeO(2)(75%)-ZrO(2)(25%) was higher than that of the commercial Ni catalyst. Moreover, the catalyst activity was retained due to its excellent resistance to coke deposition even after 5h. The Ni-precursor played a critical role in the catalytic activity. With the exception of nickel nitrate, all the Ni-precursors (chloride and sulfate) caused deactivation of the catalyst.

[1]  L. Pfefferle,et al.  Oxygen exchange between palladium and oxide supports in combustion catalysts , 2002 .

[2]  Jeong-Rang Kim,et al.  Characteristics in oxygen storage capacity of ceria-zirconia mixed oxides prepared by continuous hydrothermal synthesis in supercritical water , 2007 .

[3]  Takeo Kimura,et al.  Promoting effect of the interaction between Ni and CeO2 on steam gasification of biomass , 2007 .

[4]  L. Pfefferle,et al.  Contributions of Lattice Oxygen in Methane Combustion over PdO-Based Catalysts , 2001 .

[5]  Heejoon Kim,et al.  The reduction and control technology of tar during biomass gasification/pyrolysis: An overview , 2008 .

[6]  D. Świerczyński,et al.  Study of steam reforming of toluene used as model compound of tar produced by biomass gasification , 2008 .

[7]  K. Takanabe,et al.  Steam reforming of acetic acid as a biomass derived oxygenate: Bifunctional pathway for hydrogen formation over Pt/ZrO2 catalysts , 2006 .

[8]  Claude Mirodatos,et al.  Hydrogen production by sequential cracking of biomass-derived pyrolysis oil over noble metal catalysts supported on ceria-zirconia , 2007 .

[9]  I. Song,et al.  Hydrogen production by steam reforming of LNG over Ni/Al2O3–ZrO2 catalysts: Effect of Al2O3–ZrO2 supports prepared by a grafting method , 2007 .

[10]  R. Gorte,et al.  Characterization of SO2-poisoned ceria-zirconia mixed oxides , 2004 .

[11]  Mohammad Asadullah,et al.  Demonstration of real biomass gasification drastically promoted by effective catalyst , 2003 .

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

[13]  L. Pfefferle,et al.  Contributions of lattice oxygen to the overall oxygen balance during methane combustion over PdO-based catalysts , 2002 .