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6071680 
Journal Article 
CO2-reforming of methane over Ni/SiO2 catalyst prepared by homogeneous precipitation in sol-gel-derived silica gel 
Takahashi, R; Sato, S; Sodesawa, T; Tomiyama, S 
2005 
1 
Applied Catalysis A: General
ISSN: 0926-860X
EISSN: 1873-3875 
Elsevier 
286 
1 
142-147 
WOS:000229653200017 
Ni/SiO2 catalysts with Ni content up to 50wt.% were prepared by depositing nickel hydroxides in a sol–gel-derived wet silica gel, where nickel hydroxides were produced by the increase in pH due to the decomposition of urea. The Ni dispersion in the resulting catalysts is relatively high, and increases monotonically with increasing Ni content up to 40wt.%. The Ni/SiO2 catalysts have large volume and large-sized mesopores at ≤20wt.% Ni-loading, and have high thermal stability. In the CO2-reforming of methane, the catalytic activity proportionally increases with increasing Ni content at reaction temperatures between 500 and 900°C. High and steady catalytic activity is achieved when we use the Ni/SiO2 catalysts with Ni content of 20wt.% under the reaction conditions of high space-time velocity and high temperature. 
Ni/SiO2 catalyst; CO2-reforming of methane; catalyst preparation; thermal decomposition of urea; sol-gel method