Experimental investigation of alterations in coal fracture network induced by thermal treatment: Implications for CO2 geo-sequestration

Alireza Salmachi, Abbas Zeinijahromi, Harrison Michael Parker, Ahmad Abdulhussein, Alexander Badalyan, Philip Kwong, Saad Fahaid Khalaf Al-Afnan, Arshad Raza, Ahmed Zarzor Hussien Yaseri, Mohamed Mahmoud, Mohadese Ghasemi and Mojtaba Rajabi

Energy, 2024, vol. 308, issue C

Abstract: Hydrogen-rich syngas, produced by underground coal gasification (UCG) process, is a valuable feedstock for chemical industry. However, it can contain large quantities of carbon dioxide (CO2), which requires separation and sequestration to reduce the carbon footprint of the process. This study explores mechanisms influencing coal permeability when CO2 is injected back into the coal through existing gasification chambers. Two main mechanisms affecting permeability are thermal effects associated with underground coal gasification and CO2-related coal matrix swelling.

Keywords: Carbon capture and storage (CCS); CO2 flooding; Permeability; Micro-CT scan imaging; Matrix swelling; Thermal treatment (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:308:y:2024:i:c:s0360544224026677

DOI: 10.1016/j.energy.2024.132893

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