Journal
AICHE JOURNAL
Volume 55, Issue 5, Pages 1217-1228Publisher
WILEY
DOI: 10.1002/aic.11753
Keywords
catalysis; hydrotalcite; methanol steam reforming; hydrogen; fuel cells
Categories
Funding
- Program for New Century Excellent Talents in University [NCET-06-0423]
- Shuguang Project [06SG28]
- Shanghai Leading Academic Discipline Project [13409]
- National Natural Science Foundation of China [20590366, 20573036]
- Ministry of Science and Technology of China [2007AA05Z101]
- Science & Technology Commission of Shanghai Municipality [06SR07101]
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A series of CuZnAl oxide-composite catalysts were prepared via decomposition of CuZnAl hydrotalcite-like compounds (HTLcs). The catalysts derived from CuZnAl HTLcs (Cu: 37%, Zn: 15%, Al: 48% mol; using metal nitrate or acetate precursors) at 600 degrees C provided excellent activity and stability for the methanol steam reforming. CuZnAl HTLcs were almost decomposed completely at 600 degrees C to form highly dispersed CuO with large specific surface area while forming CuAl2O4 spinel that played a key role in separating and stabilizing the nano-sized Cu and ZnO during the reaction. The CuZnAl catalyst prepared from metal acetates could highly convert H2O/MeOH (1.3/1, mol/mol) mixture into hydrogen with only similar to 0.05% CO at 250 degrees C or similar to 0.005% at 210 degrees C. It is evidenced that the former afforded stronger Cu-ZnO interaction, which might be the intrinsic reason for the significant promotion of catalyst selectivity. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 1217-1228, 2009
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