Non-Aqueous Solvent Mixtures for CO2 Capture : Choline Hydroxide-Based Deep Eutectic Solvents Absorbent Performance at Various Temperatures and Pressures

Kassim, Mohd Azlan and Sulaiman, Nor Afifah and Yusoff, Rozita and Aroua, Mohamed Kheireddine (2023) Non-Aqueous Solvent Mixtures for CO2 Capture : Choline Hydroxide-Based Deep Eutectic Solvents Absorbent Performance at Various Temperatures and Pressures. Sustainability, 15 (12): 9191. ISSN 2071-1050

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Abstract

Carbon dioxide (CO2) absorption in a non-aqueous solution is a potential technology for reducing greenhouse gas emissions. In this study, a non-aqueous solvent, sulfolane and dimethylsulfoxide (DMSO), was functionalized with a deep eutectic solvent (DES) consisting of choline hydroxide and polyamines diethylenetriamine (DETA) and triethylenetetramine (TETA). The non-aqueous absorbents’ CO2 absorption ability was investigated in a high-pressure absorption reactor with a variable absorption temperature (303.15–333.15 K) and pressure (350–1400 kPa). The results showed that 2M ChOH:TETA−DMSO solution had the highest CO2 loading capacity when compared with other screened solutions, such as 2M ChOH:TETA−Sulfolane, 2M ChOH:DETA−DMSO and 2M ChOH:DETA−Sulfolane. It was also found that the absorption capacity increased with increasing pressure and decreased with temperature. The highest CO2 absorption by 2M ChOH:TETA−DMSO was observed at a partial pressure of 1400 kPa at 303.15 K 1.2507 mol CO2/mol DES. The use of a non-aqueous solvent in the mixture showed a phase separation phenomenon after the CO2 absorption reaction due to the formation of insoluble carbamate salt, which was identified through FTIR analysis. These findings suggest that the use of a DES polyamine mixed with a non-aqueous solvent could be a promising solution for CO2 capture.

Item Type:
Journal Article
Journal or Publication Title:
Sustainability
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
?? management, monitoring, policy and lawrenewable energy, sustainability and the environmentgeography, planning and developmentbuilding and constructionrenewable energy, sustainability and the environmentmanagement, monitoring, policy and lawgeography, plan ??
ID Code:
196430
Deposited By:
Deposited On:
05 Jul 2023 13:05
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2024 23:54