Mar, 2014
Effect of the Nature of the CeO2 Support of the Rh Catalyst on Triggering the Oxidative Reforming of n-Butane for H2 Production from Ambient Temperature
CHEMCATCHEM
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- Volume
- 6
- Number
- 3
- First page
- 784
- Last page
- 789
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1002/cctc.201300826
- Publisher
- WILEY-V C H VERLAG GMBH
Three Rh catalysts supported on CeO2 with different specific surface areas and redox properties were prepared and evaluated for their ability to trigger the oxidative reforming of n-butane from ambient temperature (approximate to 300K). The reference CeO2 catalysts supplied by the Catalyst Society of Japan (JRC-CEO-1, -3, and -4) were used as supports. Temperature-programmed reduction and O-2 titration measurements over the reduced catalysts indicated that a high number of surface CeO2 sites that were reducible below 573K were present on the Rh/CEO-3 catalyst; this catalyst had the largest specific surface area, and it generated sufficient heat by oxidizing CeO2-x [H(298K)=-368kJ; x=0.5] after H-2 reduction at 773K. Furthermore, the temperature-programmed reactions revealed that forming fine Rh particles on the high surface area of CEO-3 lowers the autoignition temperature (498K) of the oxidative reforming of n-butane because the number of exposed Rh sites initiating reactions between n-butane and O-2 is large. Thus, the Rh/CEO-3 catalyst could trigger the oxidative reforming of n-butane at ambient temperature after H-2 reduction at 773K owing to the heat generated by the spontaneous oxidation of CeO2-x. In contrast, other catalysts could not trigger the reaction after reduction at the same temperature.
- Link information
- ID information
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- DOI : 10.1002/cctc.201300826
- ISSN : 1867-3880
- eISSN : 1867-3899
- Web of Science ID : WOS:000332072300019