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    Wyświetlanie 1-3 z 3
    Tytuł:
    Coalification as a process determining the methane adsorption ability of coal seams
    Autorzy:
    Dutka, Barbara
    Godyń, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1853877.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metan
    petrografia
    adsorpcja
    coal bed methane
    degree of coalification
    petrography
    adsorption capacity
    Opis:
    The paper presents the results of a study of methane adsorption on coal samples with various degrees of metamorphism, coming from the Polish and Czech parts of the Upper Silesian Coal Basin (USCB). The range of coalification of the samples was from bituminous with vitrinite reflectance Ro equal to about 0.5% to para-anthracite coals with Ro equal to over 2%. The methane adsorption capacity was determined at the temperature 303 K for each of the studied coal seams. Methane adsorption isotherms were approximated using the Langmuir model. The relationship between the Langmuir isotherm parameters (am and PL) and the degree of coalification was presented. It was shown that the degree of coalification of the coal substance affects the adsorption ability of coal with respect to methane and determines the value of the Langmuir isotherm parameters. The study was conducted in order to present the distribution of adsorption capacity of Upper Silesian coals in relation to improving work safety in active mines as well as designing technologies that use coal bed methane (CBM) from balance and off-balance resources.
    Źródło:
    Archives of Mining Sciences; 2021, 66, 2; 181-195
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal history of the Carboniferous strata in the northern part of the Intra-Sudetic Basin (SW Poland): A combined Raman spectroscopy and organic petrography study
    Autorzy:
    Botor, Dariusz
    Toboła, Tomasz
    Waliczek, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/1835585.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Raman spectroscopy
    vitrinite reflectance
    dispersed organic matter
    coalification
    Lower Silesia Coal District
    Bohemian Massif
    spektroskopia Ramana
    refleksyjność witrynitu
    rozproszona materia organiczna
    uwęglenie
    Dolnośląskie Zagłębie Węglowe
    Masyw Czeski
    Opis:
    Raman spectroscopy and vitrinite reflectance measurements of dispersed organic matter from Carboniferous shales in boreholes in the northern part of the Intra-Sudetic Basin were used for thermal history reconstruction. Microscopic investigations have shown that the organic matter is dominated by the vitrinite maceral group. In analysed samples, organic matter shows a varied degree of thermal alteration determined by the mean random vitrinite reflectance (VRo) ranging from 0.72% to 3.80%. Mean apparent maximum vitrinite reflectance (R’max) values reached 4.98%. The full width at half maximum of D1 and G bands in Raman spectra are well-correlated with mean VRo and R’max. Thermal maturity in the boreholes shows a regular increase with depth. Geological data combined with Raman spectroscopy and mean vitrinite reflectance results indicate that the analysed Carboniferous strata reached maximum paleotemperatures from c. 110 to c. 265°C. The regional paleogeothermal gradient in the late Paleozoic was c. 80°C/km. The Variscan heating event presumably caused a major coalification process of organic matter. The Carboniferous–Permian magmatic activity must have contributed to high heat flow, adding to the effect of sedimentary burial on the thermal maturity.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 363--396
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermal history of the Carboniferous strata in the northern part of the Intra-Sudetic Basin (SW Poland): A combined Raman spectroscopy and organic petrography study
    Autorzy:
    Botor, Dariusz
    Toboła, Tomasz
    Waliczek, Marta
    Powiązania:
    https://bibliotekanauki.pl/articles/139342.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Raman spectroscopy
    vitrinite reflectance
    dispersed organic matter
    coalification
    Lower Silesia Coal District
    Bohemian Massif
    spektroskopia Ramana
    refleksyjność witrynitu
    rozproszona materia organiczna
    uwęglenie
    Dolnośląskie Zagłębie Węglowe
    Masyw Czeski
    Opis:
    Raman spectroscopy and vitrinite reflectance measurements of dispersed organic matter from Carboniferous shales in boreholes in the northern part of the Intra-Sudetic Basin were used for thermal history reconstruction. Microscopic investigations have shown that the organic matter is dominated by the vitrinite maceral group. In analysed samples, organic matter shows a varied degree of thermal alteration determined by the mean random vitrinite reflectance (VRo) ranging from 0.72% to 3.80%. Mean apparent maximum vitrinite reflectance (R’max) values reached 4.98%. The full width at half maximum of D1 and G bands in Raman spectra are well-correlated with mean VRo and R’max. Thermal maturity in the boreholes shows a regular increase with depth. Geological data combined with Raman spectroscopy and mean vitrinite reflectance results indicate that the analysed Carboniferous strata reached maximum paleotemperatures from c. 110 to c. 265°C. The regional paleogeothermal gradient in the late Paleozoic was c. 80°C/km. The Variscan heating event presumably caused a major coalification process of organic matter. The Carboniferous–Permian magmatic activity must have contributed to high heat flow, adding to the effect of sedimentary burial on the thermal maturity.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 3; 363-396
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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