Abstract
AbstractMicrobial‐enhanced coalbed methane is a feasible technique to improve gas recovery and achieve antipenetration, and the coal pores determine the gas‐adsorption capacity and permeability. To study the pore structure of bituminous coal before and after microbial treatment mercury intrusion porosimetry, nitrogen‐gas adsorption, scanning electron microscopy, X‐ray diffraction, and Fourier‐transform infrared spectroscopy was used. The results showed that the microbial treatment increased the macropores volume of the high volatile bituminous coal and sub‐bituminous coal, and decreased the micropore and mesopore volume. The porosity increased by 33.80% and 22.89% for the high volatile bituminous coal and sub‐bituminous coal, respectively. The effect of bioconversion on the pore structure increases as the degree of coal evolution increases. Because of bioconversion, the oxygen‐containing functional groups and the degree of coal crystallization were reduced and the organic matter was degraded, which lead to an enhancement of the pore connectivity. The optimal pH of the nutrient solution for microbial changes to the pore structure was 7. Compared with pure water, the reference of mine water to configure the nutrient solution was more conducive to microbial activity and had a greater impact on the pore structure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
