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2010-0264(Print)
2972-3698(Online)
Int. J. Environ. Sci. Dev.
Bimonthly
10.18178/IJESD
Prof. Richard Haynes
Prof. Gordon Huang; Prof. Marc Rosen
Ms. Cherry L. Chen
Scopus, Google Scholar, CNKI, ProQuest, EBSCO.
editor@ijesd.org
800USD

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Home > Articles > All Issues > 2016 > Volume 7 Number 7 (Jul. 2016) >
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

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 Terms—Acidithiobacillus 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: b.cruz@uadec.edu.mx).
Lourdes Díaz-Jiménez and Dora A. Cortés-Hernández are with CINVESTAV-Saltillo. Av. Industria Metalúrgica No. 1062, Ramos Arizpe, Coahuila, 25900, México (e-mail: lourdes.diaz@cinvestav.edu.mx, dora.cortes@cinvestav.edu.mx).

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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.

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