Journal
FUEL PROCESSING TECHNOLOGY
Volume 119, Issue -, Pages 52-59Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.fuproc.2013.10.005
Keywords
Anodic alumina; DME steam reforming; Copper degradation; Pre-competitive impregnation
Funding
- National Natural Science Foundation of China [20906023]
- Shanghai Rising-Star Program (B type)
- Foundation of Ministry of Education of China for Returned Scholars
- Fundamental Research Funds for the Central Universities
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A novel plate type anodic alumina supported Cu composite catalyst was developed to catalyze dimethyl ether steam reforming (DME SR) for hydrogen production. The degradation behaviors of the Cu/gamma-Al2O3/Al catalyst during DME SR were systematically studied. It is demonstrated that the catalyst was subjected to deactivation above 350 degrees C mainly due to the copper sintering. The selectivity of by-product CO is found to be very sensitive to the copper grain size. The aggregation of copper resulting in bigger copper grains will favor the reverse water gas shift reaction (r-WGS), which can be an efficient indicator to monitor the catalyst sintering process. A novel pre-competitive impregnation method was used to improve the composite catalyst. The catalyst's BET surface was significantly increased and the metal dispersion was improved via this method. The catalyst exhibited high activity and stability in DME SR even above 375 degrees C. A mechanism of this competitive impregnation was also proposed. C) 2013 Elsevier B.V. All rights reserved.
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