S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Journal Papers (저널논문_화학생물공학부)
Hydrogen production by auto-thermal reforming of ethanol over Ni/ -Al2O3 catalysts: Effect of second metal addition
- Issue Date
- Journal of Power Sources 162 (2006) 1270–1274
- Supported nickel catalyst ; Second metal ; Hydrogen production ; Auto-thermal reforming of ethanol ; Metal–support interaction ; Feul cell
- Ni/ -Al2O3 catalysts containing a second metal (Ce, Co, Cu, Mg and Zn) are prepared by a co-impregnation method to investigate the effect
of second metal addition on the catalytic performance in the auto-thermal reforming of ethanol. Among the second metals tested, Cu is found to
be the most efficient promoter for the production of hydrogen. It is revealed that Cu species are active in the water-gas shift reaction to produce
hydrogen from CO and H2O, and furthermore, Cu species serve as a barrier for preventing the growth of Ni particles. In particular, the addition of
Cu decreases the interaction between Ni-species and -Al2O3, leading to the facile reduction of Ni-Cu/ -Al2O3 catalyst. Among Ni-Cu/ -Al2O3
catalysts with different Cu content, a 5 wt.% Cu-containing Ni-Cu/ -Al2O3 catalyst, which retains an intermediate state of Cu species between
copper aluminate and copper oxide, shows the best catalytic performance in terms of hydrogen production and CO composition in the outlet stream.
By contrast, a 7 wt.% Cu-containing Ni-Cu/ -Al2O3 catalyst exhibits rather a low catalytic performance in the production of hydrogen because of
the suppressed gasification activity over large Cu particles in the catalyst.
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