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Process intensification for post combustion CO₂ capture with chemical absorption: a critical review

Wang, Meihong; Joel, Atuman S.; Ramshaw, Colin; Eimer, Dag; Musa, Nuhu M.


Meihong Wang

Atuman S. Joel

Colin Ramshaw

Dag Eimer

Nuhu M. Musa


The concentration of CO₂ in the atmosphere is increasing rapidly. CO₂ emissions may have an impact on global climate change. Effective CO₂ emission abatement strategies such as carbon capture and storage (CCS) are required to combat this trend. Compared with pre-combustion carbon capture and oxy-fuel carbon capture approaches, post-combustion CO₂ capture (PCC) using solvent process is one of the most mature carbon capture technologies. There are two main barriers for the PCC process using solvent to be commercially deployed: (a) high capital cost; (b) high thermal efficiency penalty due to solvent regeneration. Applying process intensification (PI) technology into PCC with solvent process has the potential to significantly reduce capital costs compared with conventional technology using packed columns. This paper intends to evaluate different PI technologies for their suitability in PCC process. The study shows that rotating packed bed (RPB) absorber/stripper has attracted much interest due to its high mass transfer capability. Currently experimental studies on CO₂ capture using RPB are based on standalone absorber or stripper. Therefore a schematic process flow diagram of intensified PCC process is proposed so as to motivate other researches for possible optimal design, operation and control. To intensify heat transfer in reboiler, spinning disc technology is recommended. To replace cross heat exchanger in conventional PCC (with packed column) process, printed circuit heat exchanger will be preferred. Solvent selection for conventional PCC process has been studied extensively. However, it needs more studies for solvent selection in intensified PCC process. The authors also predicted research challenges in intensified PCC process and potential new breakthrough from different aspects.


Wang, M., Joel, A. S., Ramshaw, C., Eimer, D., & Musa, N. M. (2015). Process intensification for post combustion CO₂ capture with chemical absorption: a critical review. Applied energy, 158, 275-291.

Journal Article Type Article
Acceptance Date Aug 17, 2015
Online Publication Date Aug 29, 2015
Publication Date Nov 15, 2015
Deposit Date Feb 3, 2016
Publicly Available Date Nov 23, 2017
Journal Applied energy
Print ISSN 0306-2619
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 158
Pages 275-291
Keywords Post-combustion CO₂ capture; Chemical absorption; Rotating Packed Bed (RPB); Process intensification (PI); Solvents; Intensified heat exchange
Public URL
Publisher URL
Additional Information Authors' accepted manuscript of article published in: Applied energy, 2015, v.158.


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Copyright Statement
©2015 This manuscript version is made available under the CC-BY-NC-ND 4.0 license

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