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CO2 separation using a hybrid choline-2-pyrrolidine-carboxylic acid/polyethylene glycol/water absorbent
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.
Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.
Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing, China.
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2020 (English)In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 257, article id 113962Article in journal (Refereed) Published
Abstract [en]

Developing novel hybrid absorbents is essential for CO2 separation. In this study, the density and viscosity of a hybrid absorbent (choline-2-pyrrolidine-carboxylic acid/polyethylene glycol/water ([Cho][Pro]/PEG200/H2O)) were measured experimentally, and its CO2 solubility was also determined. The excess mole volume and excess Gibbs energy of activation of the hybrid absorbent were further estimated to understand the molecular structure and interactions between [Cho][Pro]/PEG200 and H2O. The CO2 solubilities in [Cho][Pro]/PEG200 and [Cho][Pro]/H2O were analyzed and described using the Redlich–Kwong non-random-two-liquid (RK-NRTL) model. Furthermore, the CO2 solubility in the hybrid absorbent was predicted using the RK-NRTL model and was compared with the new experimental results for verification. The effect of H2O on the CO2 absorption performance was further analyzed. The performance and cost of the hybrid absorbent were compared with those of other commercialized CO2 absorbents. In addition, the recyclability of the hybrid absorbent for CO2 separation was studied. The results of this study indicated that the hybrid absorbent could be promising for CO2 separation.

Place, publisher, year, edition, pages
Elsevier, 2020. Vol. 257, article id 113962
Keywords [en]
Ionic liquid, Carbon dioxide, Property, Solubility, Modeling
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-76484DOI: 10.1016/j.apenergy.2019.113962Scopus ID: 2-s2.0-85073480738OAI: oai:DiVA.org:ltu-76484DiVA, id: diva2:1365048
Note

Validerad;2019;Nivå 2;2019-10-23 (johcin)

Available from: 2019-10-23 Created: 2019-10-23 Last updated: 2019-10-29Bibliographically approved

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Chen, YifengSun, YunhaoJi, Xiaoyan

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