TY - JOUR
T1 - Catalytic activities and coking resistance of Ni/perovskites in steam reforming of methane
AU - Urasaki, Kohei
AU - Sekine, Yasushi
AU - Kawabe, Sho
AU - Kikuchi, Eiichi
AU - Matsukata, Masahiko
PY - 2005/5/26
Y1 - 2005/5/26
N2 - Steam reforming of methane for the purpose of hydrogen production was performed using nickel catalysts supported on a variety of perovskites, including LaAlO3, LaFeO3, SrTiO3, BaTiO 3, La0.4Ba0.6Co0.2Fe 0.8O3-8, to compare the catalytic activity and resistance to coking of these catalysts to those of the conventional Ni/α-Al 2O3 catalyst. Ni/LaAlO3 and Ni/SrTiO 3 showed high catalytic activities among the Ni/ perovskites and longer-term stabilities than the conventional catalyst. Temperature programmed oxidation of carbon deposited on used catalysts revealed that inactive carbon species detected on Ni/α-Al2O3 were not formed in the case of Ni/LaAlO3. The results of temperature programmed reduction confirmed that consumption and recovery of the lattice oxygen in perovskites occurred during the reaction, and that the reducibility of perovskites had a great impact on the steam reforming activity. The lattice oxygen in perovskites is considered to play important roles in promoting the oxidation of CH, fragments adsorbed on metallic nickel.
AB - Steam reforming of methane for the purpose of hydrogen production was performed using nickel catalysts supported on a variety of perovskites, including LaAlO3, LaFeO3, SrTiO3, BaTiO 3, La0.4Ba0.6Co0.2Fe 0.8O3-8, to compare the catalytic activity and resistance to coking of these catalysts to those of the conventional Ni/α-Al 2O3 catalyst. Ni/LaAlO3 and Ni/SrTiO 3 showed high catalytic activities among the Ni/ perovskites and longer-term stabilities than the conventional catalyst. Temperature programmed oxidation of carbon deposited on used catalysts revealed that inactive carbon species detected on Ni/α-Al2O3 were not formed in the case of Ni/LaAlO3. The results of temperature programmed reduction confirmed that consumption and recovery of the lattice oxygen in perovskites occurred during the reaction, and that the reducibility of perovskites had a great impact on the steam reforming activity. The lattice oxygen in perovskites is considered to play important roles in promoting the oxidation of CH, fragments adsorbed on metallic nickel.
KW - Coking
KW - Hydrogen
KW - Lattice oxygen
KW - Ni/BaTiO
KW - Ni/LaAlO
KW - Ni/LaBaCoFeO
KW - Ni/LaFeO
KW - Ni/SrTiO
KW - Steam reforming of methane
UR - http://www.scopus.com/inward/record.url?scp=18844453750&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=18844453750&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2005.02.020
DO - 10.1016/j.apcata.2005.02.020
M3 - Article
AN - SCOPUS:18844453750
SN - 0926-860X
VL - 286
SP - 23
EP - 29
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 1
ER -
