Simulation of CO2 Capture Process in Flue Gas from Oxy-Fuel Combustion Plant and Effects of Properties of Absorbent


Oxy-fuel combustion technology is an effective way to reduce CO2 emissions. An ionic liquid [emim][Tf2N] was used to capture the CO2 in flue gas from oxy-fuel combustion plant. The process of the CO2 capture was simulated using Aspen Plus. The results show that when the liquid– gas ratio is 1.55, the volume fraction of CO2 in the exhaust gas is controlled to about 2%. When the desorption pressure is 0.01 MPa, desorption efficiency is 98.2%. Additionally, based on the designability of ionic liquids, a hypothesis on the physical properties of ionic liquids is proposed to evaluate their influence on the absorption process and heat exchanger design. The process evaluation results show that an ionic liquid having a large density, a large thermal conductivity, and a high heat capacity at constant pressure is advantageous. This paper shows that from capture energy consumption and lean circulation, oxy-fuel combustion is a more economical method. Furthermore, it provides a feasible path for the treatment of CO2 in the waste gas of oxy-fuel combustion. Meanwhile, Aspen simulation helps speed up the application of ionic liquids and oxy-fuel combustion. Process evaluation helps in equipment design and selection.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
College of Engineering & Physical Sciences
Additional Information: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/) Funding Information: Funding: This work was supported by [Zhejiang Provincial Natural Science Foundation of China #1] under Grant [LY16B060014]; and [State Key Laboratory of Chemical Engineering and the Innovation and Development of Marine Economy Demonstration #2] under Grant [No. SKL-ChE-08A01].
Uncontrolled Keywords: Aspen Plus,CO capture,ionic liquid,oxy-fuel combustion,process evaluation,Analytical Chemistry,Filtration and Separation
Publication ISSN: 2297-8739
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.mdp ... 297-8739/9/4/95 (Publisher URL)
PURE Output Type: Article
Published Date: 2022-04-11
Accepted Date: 2022-04-03
Authors: Huang, Xiaoting
Ai, Ning
Li, Lan
Jiang, Quanda
Wang, Qining
Ren, Jie
Wang, Jiawei (ORCID Profile 0000-0001-5690-9107)



Version: Published Version

License: Creative Commons Attribution

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