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.
Lim
SeungSoo
S
Department of Material Chemical Biochemical Engineering, Center for Functional Nano Fine Chemicals, Chonnam National University, Gwangju 500-757, Korea.
Moon
DongJu
D
Kim
JongHo
J
Kim
YoungChul
Y
Park
NamCook
N
Shin
JaeSoon
J
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