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This is a Experimental Study study (also classified as: Quantitative Study).

Mechanical Properties and Damage Constitutive Model of Coal Under Supercritical CO2 Conditions

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Research investigates the impact of supercritical CO2 on mechanical properties of coal, indicating important implications for carbon sequestration.

Coal strength and elastic modulus decrease with longer supercritical CO2 exposure, particularly within the first day.
A new constitutive model captures the mechanical behavior of coal under supercritical CO2, showing high consistency with test data.
Supercritical CO2 alters the internal structure of coal, damaging its pore structure through physicochemical interactions.
Findings enhance understanding of coal's mechanical properties during carbon sequestration, supporting the assessment of CO2-stored coal seam stability.

Yang et al. (2025) studied this question.

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Research investigates the impact of supercritical CO2 on mechanical properties of coal, indicating important implications for carbon sequestration.