REACTION MONITORING OF IONIC LIQUID SYNTHESIS USING RAMAN SPECTROSCOPY

• Main Author: Abdul Wahab, Muhammad Akmal
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2012
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/9887/1/2012%20-%20Reaction%20Monitoring%20of%20Ionic%20Liquid%20Synthesis%20Using%20Raman%20Spectroscopy.pdf; http://utpedia.utp.edu.my/9887/
• Institution: Universiti Teknologi Petronas

In this project, the viability of Raman spectroscopy is studied during real-time reaction monitoring of synthesis of Ionic Liquid (IL). The vital IL for this project is l-butyl-3-methylimidazolium tetrachloroferrate, [bmim] FeCU which is synthesized from the reaction of l-butyl-3-methylimidazolium chloride, [bmim] CI" and Iron (III) Chloride, FeCU. The characteristic of the Raman spectra throughout the reaction is studied by using a series of in-situ data to analyse the composition qualitatively in order to determine the individual reactant, intermediate, and product during the reaction. Raman spectroscopy is an influential instrument for researchers if it can be applied for the real-time monitoring synthesis of [bmim] FeCU". Undesired impurities such as l-butyl-3-methylimidazolium, [bmim] Fe2Cl7" ions would form during the reaction when the ratio of [bmim] CI" to FeCU is larger than 1 and Raman spectroscopic monitoring can help in determining it occurrence. These possible impurities has unknown properties and effect on the efficiency of [bmim] FeCU* in its application as a catalyst or a solvent extractor need to be studied. The project used Taguchi method as its design of experiment and 2 parameters is introduced. Reactant ratio from 1:1 to 1:2 and monitoring time from 1 to 4 hours is manipulated in L16 Taguchi Orthogonal Array. Standard room temperature and pressure of 25°C and 1 aim is assumed to be constant throughout the experiment. The result can be observed at the Raman excitation peak at the range of 50-500 cm'1. From the data obtained, [bmim] FeCU production in one-to-one ratio of synthesis does not contain any impurities while one-to-two synthesis ratio shows the difference in the spectral peak produced which indicates the additional formation of [bmim] Fe2Cl7~. This finding concludes that Raman spectroscopy is proven to be a viable method in analysing the [bmim] FeCU reaction monitoring.