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Oxidative Desulfurization of Dibenzothiophene From Model Oil Using Ionic Liquids As Extracting Agent

Taha, Mohamad Faisal and Shaharun, Maizatul Shima and Chong, Fai Kait (2012) Oxidative Desulfurization of Dibenzothiophene From Model Oil Using Ionic Liquids As Extracting Agent. In: AIP Conference Proceedings. American Institute of Physics. ISBN 978-0-7354-1094-7

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Abstract

The oxidative desulfurization of dibenzothiophene (DBT) from model oil (in n-dodecane) was carried out using ionic liquid as the extractant and catalyst, and hydrogen peroxide (H2O2) in combination with acetic acid (CH3COOH) and sulphuric acid (H2SO4) as the oxidant. The ionic liquids used were 1-butyl-3-methylimidazolium octyl sulphate ([Bmim][OcSO4]) and 1-butyl-3-methylimidazolium acetate ([Bmim][Ac]). The effect of the amounts of H2O2 on oxidative desulphurization of model oil was first investigated without the usage of ionic liquids at room temperature. The results indicate that greater amount of H2O2 give higher desulfurization and the maximum desulfurization in this study, i.e. 34 %, was occurred when the molar ratio of H2O2 to sulfur was 5:1. With the usage of ionic liquid and the molar ratio of 5:1 (H2O2:sulfur), the efficiency of DBT removal from model oil was increased significantly in terms of percent removal and removal time. Ionic liquid of [Bmim][OcSO4] performed better than [Bmim][Ac] with 72 % DBT removal. When molar ratio of H2O2 to sulphur was 5:1, volume ratio of ionic liquid to model oil was 1:1 and mixing time was 60 min at room temperature. The results indicate the potential of ionic liquids as the extractant and catalyst for oxidative desulfurization of hydrocarbon fuels.

Item Type:Book Section
Subjects:Q Science > QD Chemistry
Departments / MOR / COE:Mission Oriented Research > Green Technology
ID Code:8676
Deposited By: Mr Mohd Faisal Taha
Deposited On:13 Dec 2012 11:39
Last Modified:19 Jan 2017 08:22

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