Modification of polyethylene glycol with choline chloride and evaluation of the CO2 absorption capacity of their aqueous solutions
Document Type
Article
Publication Date
1-1-2017
Abstract
In this study, two new water-soluble poly ionic liquids (PILs) polyethylene glycol- Di choline chloride (PEG-(ChCl)2) were modified, with two molecular weights of PEG, 400 and 600, to be used as solvents for CO2 capture. The modified polymers were characterized using Fourier transform infra-red (FT-IR) spectroscopy and proton nuclear magnetic resonance (1H-NMR). CO2 absorption using the PILs was conducted at temperatures from 30 to 70°C and at pressures ranging from 10 to 13 bars. Both PILs saturated and then regenerated under the regeneration temperature: 90–100°C. The results showed that most of CO2 in the liquid phase is released through the thermal regeneration before solutions start to boil after three cycles. PEG (400)–(ChCl)2, and PEG(600)–(ChCl)2 with a concentration of 0.03M showed CO2 loading of 16.24 and 15.68, respectively. These results were 25% higher than the original PEG (400–600).
Keywords
choline chloride, CO2 absorption, poly ionic liquids, polyethylene glycol
Divisions
fac_eng,CHEMISTRY
Funders
High Impact Research Grant (HIR) (project no. UM.C/625/1/HIR/MOHE/ENG/59),IPPP University of Malaya (project no.PG027-2015B)
Publication Title
Greenhouse Gases: Science and Technology
Volume
8
Issue
2
Publisher
Wiley