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PARAMETERS OF N2 AND CO2 ADSORPTION ONTO COAL AT VARIOUS TEMPERATURES

Pajdak, A.
Abstract:
Adsorption of CO2 and N2 onto coal is used to describe its porous structure. It is mainly CO2 that allows for the analysis of the adsorption on coal, whose porous structure is dominated by micropores. Depending on the specificity of the transition process of CO2 molecules from the free state to the adsorbed state, the thermal characteristics of the adsorption process varies as well. The article presents the test results of three types of coal from Polish mines. The researcher carried out volumetric analyses of gas adsorption of coal in the pressure range of 0–0.1 MPa. The two gases were used as adsorbates: N2 (77K) and CO2 at various temperatures (258–298K). The following structural parameters of coal were determined: sorption capacity, pore size and volume and the thermal effect accompanying adsorption. The analyzed coal samples had well developed microporous structure and a high adsorption capacity in relation to CO2. The best CO2 sorption properties (258K) were recorded for the coal from ZG Sobieski: sorption capacity equal to 33.4 cm3/gSTP and the pore volume – 0.048 cm3/g. For the remaining coal samples the author determined the sorption capacity (258K) which was in the range of 21.0–21.9 cm3/gSTP and the pore volume was in the range of 0.028-0.031 cm3/g. The author determined the isosteric heat of CO2 adsorption curves. It was shown that the energy connected with adsorption on coal from ZG Sobieski is the highest.
SGEM Research areas:
Year:
2018
Type of Publication:
In Proceedings
Keywords:
coal; sorption capacity; structural parameters; isosteric heat of adsorption;
Volume:
18
SGEM Book title:
18th International Multidisciplinary Scientific GeoConference SGEM 2018
Book number:
1.3
SGEM Series:
International Multidisciplinary Scientific GeoConference-SGEM
Pages:
633-640
Publisher address:
51 Alexander Malinov blvd, Sofia, 1712, Bulgaria
SGEM supporters:
Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
Period:
02-08 July, 2018
ISBN:
978-619-7408-37-9
ISSN:
1314-2704
Conference:
18th International Multidisciplinary Scientific GeoConference SGEM 2018, 02-08 July, 2018
DOI:
10.5593/sgem2018/1.3/S03.080
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