General Information
    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
    • Executive Editor: Ms. Nancy Y. Liu
    • Abstracting/ Indexing: Chemical Abstracts Services (CAS), CABI, DOAJ, Ulrich Periodicals Directory, Engineering & Technology Digital Library, Electronic Journals Library, Crossref, ProQuest.
    • E-mail:
  • Feb 21, 2017 News! Vol. 8, No. 3 has been indexed by Crossref.
  • Feb 20, 2017 News! Vol.8, No.3 has been published with online version. 15 peer reviewed articles are published in this issue.
The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2016 Vol.7(7): 486-489 ISSN: 2010-0264
doi: 10.18178/ijesd.2016.7.7.825

Characterization and Biotechnological Clean-up Process of a TiO2 Spent Catalyst

Brenda R. Cruz-Ortiz, Lourdes Díaz-Jiménez, and Dora A. Cortés-Hernández
Abstract—TiO2-based catalysts are widely used in Claus units in natural gas-processing plants, for the conversion of hydrogen sulfide to elemental sulfur. As a result of the constant reaction cycles the catalyst suffered sulfur deposition on its active sites, resulting in a decrease of its catalytic activity. In this work a biodesulfurization process on a TiO2 spent catalyst was performed. Physicochemical characterization of the catalyst by scanning electron microscopy, X-ray diffraction, specific surface area, and elemental analysis was performed. Thiobacillus thiooxidans was the microorganism employed to eliminate the sulfur from the spent catalyst. A sulfur reduction of 60 wt.% was obtained following 30 days of treatment.

Index TermsAcidithiobacillus thiooxidans, microbial desulfurization, spent catalyst, TiO2.

Brenda R. Cruz-Ortiz is with the Ceramics Department at Autonomous University of Coahuila, México. Blvd. V. Carranza y José Cárdenas Valdés, C.P. 25280, Saltillo, Coah, México (e-mail:
Lourdes Díaz-Jiménez and Dora A. Cortés-Hernández are with CINVESTAV-Saltillo. Av. Industria Metalúrgica No. 1062, Ramos Arizpe, Coahuila, 25900, México (e-mail:,


Cite: Brenda R. Cruz-Ortiz, Lourdes Díaz-Jiménez, and Dora A. Cortés-Hernández, "Characterization and Biotechnological Clean-up Process of a TiO2 Spent Catalyst," International Journal of Environmental Science and Development vol. 7, no. 7, pp. 486-489, 2016.

Copyright © 2008-2016. International Journal of Environmental Science and Development. All rights reserved.