Impact of Supercritical Carbon Dioxide on Pore Structure and Gas Transport in Bituminous Coal: An Integrated Experiment and Simulation.

ABSTRACT: The injection of CO₂ into coal reservoirs occurs in its supercritical state (ScCO₂), which significantly alters the pore structure and chemical composition of coal, thereby influencing the adsorption and diffusion behavior of methane (CH₄). Understanding these changes is crucial for optimizing CH₄ extraction and improving CO₂ sequestration efficiency. This study aims to investigate the effects of ScCO₂ on the pore structure, chemical bonds, and CH₄ diffusion mechanisms in bituminous coal to provide insights into coal reservoir stimulation and CO₂ storage. By utilizing high-pressure CO₂ injection adsorption, low-pressure CO₂ gas adsorption (LP-CO₂-GA), Fourier-transform i

SUBMITTER: Dong K 

PROVIDER: S-EPMC11944282 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature