Modification of polyethylene glycol with choline chloride and evaluation of the CO2 absorption capacity of their aqueous solutions
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-...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Wiley
2017
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/20841/ https://doi.org/10.1002/ghg.1741 |
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| Summary: | 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). |
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