TY - JOUR
T1 - Sulfur-tolerant and carbon-resistant bimetallic catalysts for steam reforming of liquid hydrocarbon fuels for fuel cells
AU - Song, Chunshan
AU - Strohm, James J.
AU - Zheng, Jian
AU - Li, Yan
AU - Xie, Chao
AU - Chen, Yongsheng
AU - Wang, Xiaoxing
PY - 2011
Y1 - 2011
N2 - This lecture discusses the recent advances in catalytic steam reforming of liquid fuels for fuel cell applications. Liquid hydrocarbon fuels are high-density fuels that are widely available for fuel cell applications, but the higher hydrocarbons can cause coke formation and the organic sulfur leads to sulfur poisoning of the catalysts. Thus a major challenge is to develop sulfur-tolerant and carbon-resistant catalysts for steam reforming of liquid hydrocarbon fuels at low-temperature for fuel cells. Rhodium catalysts are active for low-temperature steam reforming of hydrocarbons but are easily poisoned by sulfur. Nickel catalysts are widely used for natural gas reforming for hydrogen production but suffer from quick coking with higher hydrocarbon feeds. We have proposed a design concept for new bimetallic catalysts and conducted a series of experimental work coupled with analytical characterization. Loading ceria on alumina was found to improve the steam adsorption and activation and resist coke formation. Adding nickel to rhodium was found to improve catalytic activity for hydrocarbon activation and also protect rhodium from sulfur poisoning. These findings led to the development of sulfur-tolerant and carbon-resistant bimetallic catalysts supported on CeO2-modified Al2O3 support for fuel cells. More background information is available in recent publications [C.S. Song, Catal. Today 2002 (77) 17; J.J. Strohm at al., J. Catal. 2006, 238 (2) 309; Y. Li et al., Appl. Catal A: Gen. 2009 (357) 213]. Recent advances in our laboratory will be discussed on the sulfur-tolerant and carbon-resistant catalysts for low-temperature steam reforming of liquid hydrocarbon fuels. New spectroscopic study on the nature of sulfur species and carbon species on the used reforming catalysts will also be briefly described, which provides new insight on the origin of sulfur tolerance and carbon resistance of monometallic and bimetallic catalysts.
AB - This lecture discusses the recent advances in catalytic steam reforming of liquid fuels for fuel cell applications. Liquid hydrocarbon fuels are high-density fuels that are widely available for fuel cell applications, but the higher hydrocarbons can cause coke formation and the organic sulfur leads to sulfur poisoning of the catalysts. Thus a major challenge is to develop sulfur-tolerant and carbon-resistant catalysts for steam reforming of liquid hydrocarbon fuels at low-temperature for fuel cells. Rhodium catalysts are active for low-temperature steam reforming of hydrocarbons but are easily poisoned by sulfur. Nickel catalysts are widely used for natural gas reforming for hydrogen production but suffer from quick coking with higher hydrocarbon feeds. We have proposed a design concept for new bimetallic catalysts and conducted a series of experimental work coupled with analytical characterization. Loading ceria on alumina was found to improve the steam adsorption and activation and resist coke formation. Adding nickel to rhodium was found to improve catalytic activity for hydrocarbon activation and also protect rhodium from sulfur poisoning. These findings led to the development of sulfur-tolerant and carbon-resistant bimetallic catalysts supported on CeO2-modified Al2O3 support for fuel cells. More background information is available in recent publications [C.S. Song, Catal. Today 2002 (77) 17; J.J. Strohm at al., J. Catal. 2006, 238 (2) 309; Y. Li et al., Appl. Catal A: Gen. 2009 (357) 213]. Recent advances in our laboratory will be discussed on the sulfur-tolerant and carbon-resistant catalysts for low-temperature steam reforming of liquid hydrocarbon fuels. New spectroscopic study on the nature of sulfur species and carbon species on the used reforming catalysts will also be briefly described, which provides new insight on the origin of sulfur tolerance and carbon resistance of monometallic and bimetallic catalysts.
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M3 - Conference article
AN - SCOPUS:80051909027
SN - 0065-7727
JO - ACS National Meeting Book of Abstracts
JF - ACS National Meeting Book of Abstracts
T2 - 241st ACS National Meeting and Exposition
Y2 - 27 March 2011 through 31 March 2011
ER -
