Selectivity of modified CeO2-based adsorbents for adsorptive desulfurization of hydrocarbon fuels

Shingo Watanabe, Ma Xiaoliang, Chunshan Song

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

Abstract

Adsorptive desulfurization of a model fuel over CeO2-based adsorbents was conducted in a flowing adsorption system at 25 oC under ambient pressure without using H2 gas in order to evaluate the desulfurization performance of the adsorbent for producing ultra-low-sulfur fuel. For adsorption test, the capacity and selectivity of CeO2-based adsorbents for various sulfur compounds and the co-existing olefin and aromatic compound were used. Doping Ti and W into CeO2 significantly improved the sulfur removing capacity. The breakthrough sequence of the compounds over the CeO2-based adsorbents was, 1-C8 olefin °Ö toluene < thiophene < benzothiophene < 2-methyl benzothiophene < tetrahydrothiophene. By comparison of selectivity study and computational analysis, it was found that the electron density on sulfur atom might play a more important role than the D-electron density in the selective adsorption over the CeO2-based adsorbents. To understand the nature of interactions between adsorbate and adsorbent along with adsorptive desulfurization test, the CeO2-based adsorbents were investigated by an XRD and XPS technique. Considering results of adsorption and XRD, the adsorbents with smaller crystalline size and lattice parameter show the higher performance on adsorption for sulfur removing. In XPS study, the intensity of peak of lattice oxygen with higher binding energy seems nearly proportional to the thiophene removal capacity.

Original languageEnglish (US)
Title of host publicationAbstracts of Papers - 232nd American Chemical Society Meeting and Exposition
StatePublished - Dec 1 2006
Event232nd American Chemical Society Meeting and Exposition - San Francisco, CA, United States
Duration: Sep 10 2006Sep 14 2006

Publication series

NameACS National Meeting Book of Abstracts
Volume232
ISSN (Print)0065-7727

Other

Other232nd American Chemical Society Meeting and Exposition
CountryUnited States
CitySan Francisco, CA
Period9/10/069/14/06

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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    Watanabe, S., Xiaoliang, M., & Song, C. (2006). Selectivity of modified CeO2-based adsorbents for adsorptive desulfurization of hydrocarbon fuels. In Abstracts of Papers - 232nd American Chemical Society Meeting and Exposition (ACS National Meeting Book of Abstracts; Vol. 232).