@ARTICLE{Dutka_Barbara_Studies_2026,
 author={Dutka, Barbara and Sułkowska, Katarzyna},
 volume={vol. 71},
 number={No 1},
 pages={143-159},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2026},
 publisher={Committee of Mining PAS},
 abstract={The study focuses on the analysis of pore structure and the determination of CO2 adsorption properties of different rank coals originating from the Upper Silesian Coal Basin. Measurements were performed using a low-pressure volumetric apparatus ASAP 2020, Micromeritics, for sample porosity characterisation, and a gravimetric analyser IGA-001, Hiden Isochema, for gas adsorption measurements in the range of elevated adsorbate pressures. CO2 adsorption isotherms were determined in the CO2 pressure and temperature, 0-100 kPa at 0°C and 0-1200 kPa at 30°C, respectively. Coal investigations were complemented by microscopic, technical and densimetric analyses. CO2 adsorption studies showed the absence of a universal model that adequately describes both low-pressure and elevated-pressure processes. Adoption of the Langmuir-Freundlich model proved appropriate for most coals (5 of 6), while for one sample (CR2), a better fit was obtained with the Freundlich model. The analyses confirmed differences in the pore structure and CO₂ adsorption properties of coals with different rank. With increasing degree of coalification, an increase in specific surface area and micropore volume was observed. All coals exhibited narrow micropores with sizes <0.7 nm (ultramicropores). Analysis of pore size distributions by the DFT method showed that the porous structure of the coals was crucial for assessing CO2 adsorption performance and the transport properties of coal. The diffusion rate was not limited by the high rank of coal but rather by the structural heterogeneity of the pores, which could be detected by analysing the pore size distribution.},
 title={Studies on the Pore Structure and CO2 Adsorption Performance of Different Rank Coals},
 type={Article},
 URL={http://czasopisma.pan.pl/Content/138654/PDF/Archiwum-71-1-08-Dutka.pdf},
 doi={10.24425/ams.2026.157760},
 keywords={Coal, CO2, adsorption, pore structure, textural properties, effective diffusion coefficient, coal rank},
}