Posters - IGWS

Permanent link for this collectionhttps://hdl.handle.net/2022/421

This series is comprised of maps and topical posters, usually containing a combination of photographs and graphics. Typically educational in nature, they are intended for a public audience. Posters go through a full formal review, are usually commercially offset printed in large batches, and are sold through the IGWS Bookstore.

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Browsing Posters - IGWS by Author "Drobniak, Agnieszka"

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    CO2 emissions from Illinois Basin coals and influence of their petrographic composition
    (2010-09-12) Drobniak, Agnieszka; Mastalerz, Maria; Chadwick, Crystal
    Lithotypes from Pennsylvanian high-volatile bituminous coals from the Illinois Basin were isolated by hand and analyzed to investigate the influence of their chemical and petrographic composition on the amount of CO2 emissions during combustion. Heating values and ultimate carbon contents were used to calculate CO2 emissions from individual lithotypes as well as whole seam samples. The influence of maceral composition, vitrinite reflectance (Ro), and other selected coal properties on calculated CO2 emissions was investigated for the Danville, Springfield, and Lower Block Coal Members of the Dugger, Petersburg, and Brazil Formations, respectively. In general, little difference in CO2 emissions has been documented for each of the four locations. Calculated mean values of CO2 emission from bulk seam samples vary from 86.04 to 88.38 (in kg of CO2 per gigajoule [GJ]). Emissions from selected lithotypes show more variations. In fusains, CO2 emissions vary from 78.93 to 95.58, with 89.58 being the average. Fusain is the lithotype that has the highest average emissions of all lithotypes studied. For vitrains, calculated emissions range from 86.18 to 89.01, having the average of 87.92. Clarain, the dominant lithotype of these coals has a range of emissions from 86.02 to 86.86 kg of CO2 per gigajoule. On a maceral scale, our study shows that an increase in inertinite content correlates with an increase of CO2 emissions, whereas increasing liptinite content is associated with decreasing CO2 emissions.
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    Coal of Indiana
    (Indiana Geological & Water Survey, 2010) Drobniak, Agnieszka; Mastalerz, Maria
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    Contact Metamorphism of Bituminous Coal by Intruding Dike in the Illinois Basin Causes Short-Range Thermal Alteration
    (2007-08) Drobniak, Agnieszka; Mastalerz, Maria; Schimmelmann, Arndt; Sauer, Peter
    Changes in high-volatile bituminous coal (Pennsylvanian) near contacts with volcanic intrusions in Illinois were investigated with respect to coal chemistry, carbon and hydrogen stable isotope ratios, and pore structure. Vitrinite reflectance (Ro) increases from ~0.6% to ~5% within 4.7 m from the dike. Elemental chemistry of the coal shows distinct reduction in hydrogen and nitrogen content approaching the intrusions. No trend was noticed for total sulfur content, but decreases in sulfate and organic sulfur contents towards the dikes indicate thermal sulfur reduction (TSR). Carbon isotopic values did not show significant changes, whereas hydrogen isotopic values showed a distinct trend of becoming more negative toward the dikes. Contact metamorphism has a dramatic effect on coal porosity. The mesopore volume decreases 3 3 from 0.01 cm /g in the unaffected coal to 0.004 cm /g at a distance 3 of 4.5 m away from the contact, then hovers around 0.004 cm /g closer to the contact. In contrast, the micropore volume shows a 3 progressive decrease from 0.04 cm /g in unaffected coal to almost 3 0.01 cm /g at the contact. Strongly decreasing mesopore and micropore volumes in the altered zone, together with frequent cleat and fracture-filling by calcite, indicate deteriorating conditions for both coalbed gas sorption and gas transmissibility.