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Energies 2011, 4(11), 1880-1896; doi:10.3390/en4111880

Photocatalytic Desulfurization of Waste Tire Pyrolysis Oil

1
Program in Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
2
Environment Ecology and Energy Department, Thailand Institute of Scientific and Technological Research (TISTR), Bangkok 10900, Thailand
3
Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
4
Center for Petroleum, Petrochemicals, and Advanced Materials, Chulalongkorn University, Bangkok 10330, Thailand
*
Author to whom correspondence should be addressed.
Received: 31 August 2011 / Revised: 28 October 2011 / Accepted: 28 October 2011 / Published: 3 November 2011
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Abstract

Waste tire pyrolysis oil has high potential to replace conventional fossil liquid fuels due to its high calorific heating value. However, the large amounts of sulfurous compounds in this oil hinders its application. Thus, the aim of this research was to investigate the possibility to apply the photo-assisted oxidation catalyzed by titanium dioxide (TiO2, Degussa P-25) to partially remove sulfurous compounds in the waste tire pyrolysis oil under milder reaction conditions without hydrogen consumption. A waste tire pyrolysis oil with 0.84% (w/w) of sulfurous content containing suspended TiO2 was irradiated by using a high-pressure mercury lamp for 7 h. The oxidized sulfur compounds were then migrated into the solvent-extraction phase. A maximum % sulfur removal of 43.6% was achieved when 7 g/L of TiO2 was loaded into a 1/4 (v/v) mixture of pyrolysis waste tire oil/acetonitrile at 50 °C in the presence of air. Chromatographic analysis confirmed that the photo-oxidized sulfurous compounds presented in the waste tire pyrolysis oil had higher polarity, which were readily dissolved and separated in distilled water. The properties of the photoxidized product were also reported and compared to those of crude oil. View Full-Text
Keywords: photooxidation; desulfurization; waste tire; pyrolysis; titanium dioxide photooxidation; desulfurization; waste tire; pyrolysis; titanium dioxide
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MDPI and ACS Style

Trongkaew, P.; Utistham, T.; Reubroycharoen, P.; Hinchiranan, N. Photocatalytic Desulfurization of Waste Tire Pyrolysis Oil. Energies 2011, 4, 1880-1896.

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