Co<sub>2</sub> Solubility in Silica Supported [hmim][Tf<sub>2</sub>N]
Mat Dagang Nurul SafiahMohamad Azmi BustamNormawati M. YunusZakaria Man
Abstract
Solid supported ionic liquids can be used to overcome the high viscosity issue of ionic liquids and help increase the efficiency of CO 2 removal. In this research, [hmi [Tf 2 was impregnated into porous silica dioxide (SiO 2 ) and characterized using Porous and Surface Analyzer, Thermogravimetric Analysis (TGA) and Spectroscopy RAMAN. The CO 2 solubility was measured at different pressure at room temperature. The mole fraction of CO 2 captured was increased as the pressure increased, and the highest mole fraction was at 40 bar. The mole fraction of CO 2 captured at 40 bar for SiO 2 -[hmi [Tf 2 was 0.812 which was higher compared to pure [hmi [Tf 2 , with mole fraction of 0.650. Henrys Law Constant (K H ) was higher for SiO 2 -[hmi [Tf 2 with 26.8±5.2 bar while for [hmi [Tf 2 , the K H was 35.4±3.3 bar.
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