Co₂ Solubility in Silica Supported [hmim][Tf₂N]

Abstract:

Solid supported ionic liquids can be used to overcome the high viscosity issue of ionic liquids and help increase the efficiency of CO₂ removal. In this research, [hmi [Tf₂ was impregnated into porous silica dioxide (SiO₂) and characterized using Porous and Surface Analyzer, Thermogravimetric Analysis (TGA) and Spectroscopy RAMAN. The CO₂ solubility was measured at different pressure at room temperature. The mole fraction of CO₂ captured was increased as the pressure increased, and the highest mole fraction was at 40 bar. The mole fraction of CO₂ captured at 40 bar for SiO₂-[hmi [Tf₂ was 0.812 which was higher compared to pure [hmi [Tf₂, with mole fraction of 0.650. Henrys Law Constant (K_H) was higher for SiO₂-[hmi [Tf₂ with 26.8±5.2 bar while for [hmi [Tf₂, the K_H was 35.4±3.3 bar.

• Periodical: Advanced Materials Research (Volume 626)
• Pages: 509-513
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.626.509
• Online since: December 2012
• Authors: Mat Dagang Nurul Safiah, Mohammad Azmi Bustam, Normawati M. Yunus, Zakaria Man
• Keywords: [hmim][Tf₂N], SiO₂, Solid Supported Ionic Liquid, Solubility of Co₂

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