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Drying of Ionic Liquid

Che Yusuf, Che Fatin Humaira (2012) Drying of Ionic Liquid. UNIVERSITI TEKNOLOGI PETRONAS, UNIVERSITI TEKNOLOGI PETRONAS. (Unpublished)

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Abstract

Room Temperature Ionic Liquids (RTILs) are salts in liquid phase. Continuous use of RTIL in a process may cause it to be contaminated with water and organic impurities over time making it necessary to regenerate and purify the RTIL for recycle purposes. Thus, drying is needed during pre-treatment and purification of IL solution before it can be used in any application to reduce weight, increase ease of handling and eliminate unwanted effects of moisture content towards IL properties. Drying process of ionic liquid is important since moisture levels that are too high may affect performance and reliability in most applications such as during synthesis of RTILs using aqueous solution to necessitate anion exchange and also in concentrating Benfield solution for recycles purposes during removal of CO2. Therefore, to obtain the most optimum condition of drying for ionic liquids, the study on kinetic of drying is reported here by investigating the effects of drying temperatures, initial water content, types of ionic liquid cation and anion and different drying methods on drying curves and their subsequent kinetic parameters. Drying was done at 100, 120, 140, 160 and 180°C. The ratios of ionic liquid to water used were 1:4, 1:3, 1:2, 1:1 and 2:1. Ionic liquids containing [bmim] cation with [SO4]- or Phosphate-containing anion were used and drying methods applied were halogen lamp and vacuum drying methods. Thermogravimetric analysis which measures change of mass over time throughout the drying process was used to generate primary drying curves which were then manipulated to get secondary kinetic data. The drying process mainly occurred during falling rate period. Samples dried under higher temperature using vacuum drying have higher maximum drying rates, lower final moisture contents, higher drying constants and shorter drying times. The same result is observed for samples containing smaller anion and higher ratio of IL to water.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Ionic Liquid
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Sharifah Fahimah Saiyed Yoep
Date Deposited: 01 Apr 2013 09:14
Last Modified: 25 Jan 2017 09:39
URI: http://utpedia.utp.edu.my/id/eprint/6126

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