Hydrogen production by steam reforming of methane over mixed Ni/MgAl þ CrFe3O4 catalysts

Title
Hydrogen production by steam reforming of methane over mixed Ni/MgAl þ CrFe3O4 catalysts
Authors
김나영양은혁임성수정재선이재석홍기훈노영수이관영문동주
Keywords
Steam reforming; WGS reaction; Hydrogen production; Physically mixed catalyst
Issue Date
2015-09
Publisher
International journal of hydrogen energy
Citation
VOL 40, NO 35, 11848-11854
Abstract
Steam reforming of methane (SRM) was performed over a mixed Ni/MgAl + CrFe3O4 catalyst. The catalyst was prepared by physical mixing method and it was compared to Nil MgAl and iron or chromium promoted WNi/MgAl catalysts prepared by impregnation method. Catalysts were characterized by various analytical techniques such as nitrogen physisorption, TPR, XRD, TGA and SEM. The catalytic activity in a fixed-bed reactor was investigated at a temperature range of 500-700 degrees C, 1 bar pressure and feed molar ratio of H2O/CH4 = 2. TPR and XRD illustrated that segregated Ni particles were observed with promoted M-Ni/MgAl catalysts and it leads to reduce the active Ni metal. The addition of the Cr/Fe3O4 catalyst activates steam and easily reacts with methane. Consequently, physically mixed catalysts showed higher hydrogen selectivity and methane conversion than the other catalysts.
URI
http://pubs.kist.re.kr/handle/201004/50650
ISSN
03603199
Appears in Collections:
KIST Publication > Article
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