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

Author

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

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.

Suggested Citation

  • Salmachi, Alireza & Zeinijahromi, Abbas & Parker, Harrison Michael & Abdulhussein, Ahmad & Badalyan, Alexander & Kwong, Philip & Al-Afnan, Saad Fahaid Khalaf & Raza, Arshad & Yaseri, Ahmed Zarzor Huss, 2024. "Experimental investigation of alterations in coal fracture network induced by thermal treatment: Implications for CO2 geo-sequestration," Energy, Elsevier, vol. 308(C).
    • Handle: RePEc:eee:energy:v:308:y:2024:i:c:s0360544224026677
    DOI: 10.1016/j.energy.2024.132893
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