Integrated absorption–mineralisation for energy-efficient CO<inf>2</inf> sequestration: Reaction mechanism and feasibility of using fly ash as a feedstock

Ji, Long, Yu, Hai, Yu, Bing, Jiang, Kaiqi, Grigore, Mihaela, Wang, Xiaolong, Zhao, Shuaifei and Li, Kangkang 2018, Integrated absorption–mineralisation for energy-efficient CO2 sequestration: Reaction mechanism and feasibility of using fly ash as a feedstock, Chemical Engineering Journal, vol. 352, pp. 151-162, doi: 10.1016/j.cej.2018.07.014.

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Title Integrated absorption–mineralisation for energy-efficient CO2 sequestration: Reaction mechanism and feasibility of using fly ash as a feedstock
Formatted title Integrated absorption–mineralisation for energy-efficient CO₂ sequestration: Reaction mechanism and feasibility of using fly ash as a feedstock
Author(s) Ji, Long
Yu, Hai
Yu, Bing
Jiang, Kaiqi
Grigore, Mihaela
Wang, Xiaolong
Zhao, ShuaifeiORCID iD for Zhao, Shuaifei orcid.org/0000-0002-7727-6676
Li, Kangkang
Journal name Chemical Engineering Journal
Volume number 352
Start page 151
End page 162
Total pages 12
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2018-11-15
ISSN 1385-8947
Keyword(s) CO2 capture
Chemical regeneration
MEA
Multicycle
Fly ash
Science & Technology
Technology
Engineering, Environmental
Engineering, Chemical
Engineering
POSTCOMBUSTION CARBON CAPTURE
MOLECULAR STRUCTURAL VARIATIONS
TECHNOECONOMIC ASSESSMENT
MORPHOLOGICAL-CHANGES
MEMBRANE EVAPORATION
DIOXIDE CAPTURE
AMINE SOLUTION
KINETICS
CO2(AQ)
STORAGE
Summary © 2018 Elsevier B.V. The most critical challenge for the large-scale implementation of amine-based carbon dioxide (CO2) capture is the high energy consumption of absorbent thermal regeneration. To reduce the energy requirement, absorbent thermal regeneration can be replaced by a chemical method that integrates amine scrubbing, chemical regeneration and CO2 mineralisation in one process. However, the mechanisms of the process and the application of industrial waste as feedstocks have not been fully investigated. In the present work, we studied the integrated CO2 absorption–mineralisation process using the benchmark solvent monoethanolamine (MEA) as an amine absorbent and fly ash as a chemical regeneration agent. We investigated the mechanism involved in the mineralisation in detail and studied the performance of MEA in regeneration by mineralisation of calcium oxide (CaO) at various CO2-loadings. The performance stability of MEA was verified in multicycle CO2 absorption–mineralisation experiments. We also investigated the technical feasibility of using fly ash as a feedstock for absorbent regeneration. Our results show that MEA can be regenerated after a carbonation reaction with both calcium oxide and fly ash at 40 °C, and that the CO2 absorbed by MEA is precipitated as calcium carbonate. Compared with traditional thermal regeneration-based CO2 capture, the integrated CO2 absorption–mineralisation process displays a similar cyclic CO2-loading (0.21 mol/mol) but has great advantages in energy reduction and capital cost savings due to the smaller energy requirement of amine regeneration and the limitation of CO2 compression and pipeline transport. This technology has great potential for industrial application, particularly with CaO-containing wastes such as fly ash and carbide slag.
Language eng
DOI 10.1016/j.cej.2018.07.014
Indigenous content off
Field of Research 090401 Carbon Capture Engineering (excl Sequestration)
0904 Chemical Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30129282

Document type: Journal Article
Collections: Institute for Frontier Materials
GTP Research
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