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

Xiaoting Huang, Ning Ai*, Lan Li, Quanda Jiang, Qining Wang, Jie Ren, Jiawei Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number95
Issue number4
Publication statusPublished - 11 Apr 2022

Bibliographical note

© 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://

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].


  • Aspen Plus
  • CO capture
  • ionic liquid
  • oxy-fuel combustion
  • process evaluation


Dive into the research topics of 'Simulation of CO2 Capture Process in Flue Gas from Oxy-Fuel Combustion Plant and Effects of Properties of Absorbent'. Together they form a unique fingerprint.

Cite this