Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Binary Mixtures' Thermophysical Properties Study of Novel Ionic Liquids Incorporating Thiosalicylate Anion

Mustafa, Fadwa Babiker (2010) Binary Mixtures' Thermophysical Properties Study of Novel Ionic Liquids Incorporating Thiosalicylate Anion. Universiti Teknologi PETRONAS. (Unpublished)

[img] PDF
Download (3017Kb)

Abstract

Ionic liquids are a class of organic molten salts "designer solvents" that are composed totally of anions (inorganic poly-atomic parts e.g., tetrafluoroborate [BF4]") and organic cations (e.g., l-butyl-3-methylimidazolium - [BMIM]. Among the several aspects of green chemistry, the reduction/replacement of volatile organic solvents from the reaction medium is of utmost importance since the use of a large excess of conventional volatile solvents required to conduct a chemical reaction creates ecological and economic concerns. This research looks at producing a new cluster of ionic liquids which have the same anion part of thiosalicylate [C6H4SHCOO]" with various cations of choline, tetramethylamonium, methylimidazolium and pyridinium which the lattertwo differ on the chain length. The chemical and physical properties such as the thermophysical properties of density, viscosity and refractive index for the pure ionic liquids and chiefly the density and viscosity for their binary systems with water are examined. From experimental data the molecular volume (Fm), thermal expansion coefficient (aP), standard entropy (S°) and crystal energy (Upot) which are considered as derived thermophysical properties are studied for the pure ionic liquids particularly room temperature ionic liquids (RTILs). From the Thermal Gravimetric Analysis (TGA) the decomposition temperature for 1- octyl-3-methylimidazolium thiosalicylate, l-butyl-3-methylimidazolium thiosalicylate, choline thiosalicyalte, tetra-methylammonium thiosalicylate and 1-octylpyridinium thiosalicylate as 212.02 °C, 253.2 °C, 195.34°C, 225.05 °C and 235.1 °C respectively. Based on the experiemental data the crystal energy for l-octyl-3-methylimidazolium thiosalicylate, 1-octylpyridinium thiosalicylate and choline thiosalicyalte were calculated in respect to their densities at 25 °C to be 399.6 , 396.9 and 450.2 kj correspondingly. The dissertation included the synthesis methodology for thiosalicylate ionic liquids, characterization of the pure ionic liquids and their binary mixtures such as densities and viscosities, proton Nuclear Magnetic Resonance analysis (]HNMR) and the derived thermo physical properties data for pure ionic liquids.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Separation Process
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 12:10
Last Modified: 22 Oct 2013 12:10
URI: http://utpedia.utp.edu.my/id/eprint/9416

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...