Autothermal reforming of propane over Ni catalysts supported on a variety of perovskites.
Autothermal reforming of propane for hydrogen over Ni catalysts supported on a variety of perovskites was performed in an atmospheric flow reactor. Perovskite is known for its higher thermal stability and oxygen storage capacity, but catalytic activity of itself is low. A sites of the ABO3 structured perovskites were occupied by La while B sites by one of Fe, Co, Ni, and Al by citrate method. The composition of the reactant mixture was H2O/C/O2 = 8.96/1.0/1.1. The changes in the states of the catalysts after reaction were analyzed by XRD, TPD, and TGA. Ni/LaAlO3 catalyst maintained the perovskite structure after reaction. It showed higher hydrogen yield and thermal stability compared to those of the catalysts with Fe, Co, or Ni in B sites. Catalysts prepared by deposition-precipitation (DP) method showed higher activity than those prepared by impregnation method, presumably due to the smaller sizes of the NiO crystal particles.
Department of Material Chemical Biochemical Engineering, Center for Functional Nano Fine Chemicals, Chonnam National University, Gwangju 500-757, Korea.
SeungSoo
S
Lim
DongJu
D
Moon
JongHo
J
Kim
YoungChul
Y
Kim
NamCook
N
Park
JaeSoon
J
Shin
D017610:Calcium Compounds / Q000737:chemistry*; D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D006358:Hot Temperature; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D011407:Propane / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D017610:Calcium Compounds; D046911:Macromolecular Substances; D010087:Oxides; C059910:perovskite; D009532:Nickel; D014025:Titanium; D011407:Propane