Table of Contents
Journal of Thermodynamics
Volume 2011, Article ID 978324, 14 pages
http://dx.doi.org/10.1155/2011/978324
Research Article

Physiochemical Properties of Hydrodenitrification and Hydrodesulphurization Inhibiting Compounds with 1-Ethyl-3-Methylimidazolium Ethylsulphate at T = (298.15 to 323.15) K and 𝑝 = 1 Bar

Department of Chemical Engineering, Indian Institute of Technology Guwahati, Assam, Guwahati 781039, India

Received 25 November 2010; Accepted 28 February 2011

Academic Editor: Dominique Richon

Copyright © 2011 Ramalingam Anantharaj and Tamal Banerjee. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work investigates the ability of 1-ethyl-3-methylimidazolium ethylsulphate ([emim][EtSO4]) as a green and tuneable solvent for denitrification and desulphurization of diesel oil. Experimental density, surface tension, and refractive index data have been measured for the following systems: [emim][EtSO4](1) + pyridine(2), [emim][EtSO4](1)+ pyrrole(2), [emim][EtSO4](1) + quinoline(2), [emim][EtSO4](1) + indoline(2), [emim][EtSO4](1) + thiophene(2), and [emim][EtSO4](1) + water(2) over the entire mole fraction of [emim][EtSO4] at temperatures of (298.15 to 323.15) K and at atmospheric pressure. Further, from experimental density values, coefficient of thermal expansivity and excess molar volume were also calculated. It was found that the heteroaromatic nitrogen/sulphur compounds and water are completely miscible in the [emim][EtSO4] ionic liquid. The surface tension values were found to increase while the refractive index decrease with increasing mole fraction of [emim][EtSO4]. On the other hand, dissimilar molecule such as water showed mobility of ions on mixing resulting in lower surface tension. The experimental values of surface tension increased in the order: thiophene > pyridine > pyrrole > indoline > quinoline and for refractive index: quinoline > indoline > pyrrole > pyridine > thiophene > water. It was found that the composition of [emim][EtSO4] has a greater influence than temperature in deciding the densities, surface, optical, and thermodynamic properties.