Photocatalytic Desulfurization of Waste Tire Pyrolysis Oil

Phakakrong Trongkaew, Thanes Utistham, Prasert Reubroycharoen and Napida Hinchiranan
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Phakakrong Trongkaew: Program in Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
Thanes Utistham: Environment Ecology and Energy Department, Thailand Institute of Scientific and Technological Research (TISTR), Bangkok 10900, Thailand
Prasert Reubroycharoen: Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
Napida Hinchiranan: Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

Energies, 2011, vol. 4, issue 11, 1-17

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 (TiO 2 , 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 TiO 2 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 TiO 2 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.

Keywords: photooxidation; desulfurization; waste tire; pyrolysis; titanium dioxide (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2011
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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