XANES Studies of sulfur poisoning in Rh, Ni catalysts for steam reforming of liquid hydrocarbons

Yongsheng Chen, Chao Xie, Yan Li, Chunshan Song

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

Abstract

Three catalysts, CeO2 modified Al2O3 supported monometallic 10%Ni, 2%Rh, and bimetallic 2%Rh10%Ni catalysts were tested for steam reforming reaction of Norpar13 (ExxonMobil) at 800 °C with the presence of 350 ppm organic sulfur. X-ray absorption near edge spectroscopy (XANES) was successfully applied to the sulfur poisoned catalysts, and identified a few sulfur species including sulfides, adsorbed sulfur poison, sulfonate and sulfate. The significance of the current findings is two-fold: the existence of the other sulfur species besides sulfides manifests that the long-believed sulfur poisoning mechanism, the formation of metal sulfides, needs to be reconsidered; the presence of sulfate and other sulfur species indicates complicated involvements of sulfur in the hydrocarbon chemistry. Thus, the current results suggest that the deactivation effects of other sulfur species besides sulfides and the influence of sulfur on the other deactivation processes such as carbon deposition should be included in the sulfur poisoning mechanism.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: Mar 22 2009Mar 26 2009

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period3/22/093/26/09

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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