CO₂ capture analysis in different combustion methods for CO₂ utilisation and storage
by Weijia Huang; Ruina Xu; Fuzhen Zhang; Yining Zou; Peixue Jiang
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 29, No. 3, 2022

Abstract: The high energy consumption of CO₂ capture is the main issue of the application of CO₂ capture, utilisation and storage, new CO₂ capture methods based on oxy-fuel combustion and chemical looping combustion are receiving considerable attention. However, the energy consumption performance of these methods is rarely compared when they are used as the CO₂ source for CO₂ utilisation and storage. This work analysed both the new developing and traditional methods of CO₂ capture process to obtain their energy consumption performances. The CO₂ capture processes of the oxy-fuel combustion and chemical looping combustion were respectively built and simulated under pressure varied from 0.1 MPa to 8.0 MPa. The captured CO₂ product of each process was set to the same level of parameters for transportation, and a calculation method was developed to convert all types of energy consumption to equivalent power consumption. The results show that both the new CO₂ capture methods have notable potential of low energy consumption, especially under higher combustion pressures. If the air separation process is considered, the oxy-fuel combustion CO₂ capture requires further technical development to defeat the post-combustion CO₂ capture, although it has the advantage of high CO₂ concentration. The impacts of pressures of inlet gas and process sequence are analysed to be the key reasons for energy performance. [Received: May 23, 2019; Accepted: January 10, 2021]

Online publication date: Wed, 23-Feb-2022

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