Prereforming of liquid hydrocarbons over bimetallic Rh-Ni catalysts: Influence of support

Chao Xie, Yan Li, Xiaoxing Wang, Chunshan Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Steam reforming of liquid hydrocarbons for fuel cell applications is attracting great attention in recent years. However, sulfur poisoning and carbon deposition are two major challenges. Low-temperature (450-550°C) steam reforming, namely pre-reforming has been suggested as an alternative way to mitigate the carbon deposition due to fuel thermal decomposition. Recently, a high sulfur and carbon resistant bimetallic Rh-Ni catalyst for pre-reforming of jet fuels has been developed in our lab. In the present work, CeO2-modified materials including Al2O3, TiO2, and SiO2 supported bimetallic Rh-Ni catalysts have been prepared and evaluated for steam reforming of Norpar-13 with 350 ppmw sulfur at 550°C. The results show that a support with high surface area may be beneficial to achieve better catalytic performance probably via improving metal dispersions. TPR characterization showed that the Ni-support interaction decreases in a following sequence: 2Rh10Ni/20CeAl > 2Rh10Ni/20CeTi > 2Rh10Ni/20CeSi. Meanwhile, TPO profiles showed that (1) over 2Rh10Ni/20CeAl mainly amorphous carbon was formed, (2) highly ordered carbon species was identified on 2Rh10Ni/20CeSi, (3) both amorphous and highly ordered carbons were observed over 2Rh10Ni/20CeTi. Combining the TPR results, these facts may indicate that strong Ni-support interaction (e.g., Ni-Al) is effective in suppressing the formation of highly ordered graphite carbon.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 236th National Meeting and Exposition, Abstracts of Scientific Papers
StatePublished - Dec 1 2008
Event236th National Meeting and Exposition of the American Chemical Society, ACS 2008 - Philadelpia, PA, United States
Duration: Aug 17 2008Aug 21 2008

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other236th National Meeting and Exposition of the American Chemical Society, ACS 2008
CountryUnited States
CityPhiladelpia, PA
Period8/17/088/21/08

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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