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CO2 uptake behavior of supported tetraethylenepentamine sorbents
Department of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
Department of Chemistry and Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing.
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing University of Chemical Technology, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology.
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2016 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 30, no 6, p. 5083-5091Article in journal (Refereed) Published
Abstract [en]

Supported tetraethylenepentamine (TEPA) sorbents have been proposed as an attractive alternative for postcombustion carbon capture. To promote the application of these sorbents, in this work, a systematic investigation of CO2 absorption behavior on five TEPA-immobilized sorbents was conducted, in which the effects of TEPA loading, supports, and temperatures on both CO2 absorption working capacity and kinetics were studied. Poly(methyl methacrylate) (PMMA)-TEPA is the best among the studied sorbents. The optimal temperature for PMMA-TEPA was 25 deg lower compared to other sorbents studied in this work, and the maximum CO2 capacity was 0.17 g/g-sorbent. This is the highest value reported to date for PMMA-TEPA sorbents, and one of the high values that have been reported for TEPA-immobilized sorbents. In addition, the working capacity of PMMA-TEPA after six cycles of regeneration was 0.16 g/g-sorbent (i.e., with only 6% decrease). Therefore, PMMA is promising to be used as supporting material for TEPA in CO2 capture. The kinetics analysis with both the Avrami’s fractional-order kinetic model and the mass-transfer model on the basis of nonequilibrium thermodynamics was further conducted and discussed. Besides, it was also found that the CO2 absorption kinetics and capacity were affected by both the pore structure and the surface chemistry of the support.

Place, publisher, year, edition, pages
2016. Vol. 30, no 6, p. 5083-5091
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-10216DOI: 10.1021/acs.energyfuels.6b00558ISI: 000378195600072Scopus ID: 2-s2.0-84975256706Local ID: 8fa5d994-7940-49f1-b7f1-b995d9ef6e01OAI: oai:DiVA.org:ltu-10216DiVA, id: diva2:983156
Note
Validerad; 2016; Nivå 2; 20160510 (xiajix)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Ji, Xiaoyan

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