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The aim of this study is to examine the CO2 gas adsorption capability of coals from Sohagpur coalfield, India. Coal bed CO2 sequestration is a technique utilized to mitigate carbon dioxide emissions and improve global warming. Various factors, including pore structure, pore volume, mineral composition, moisture content, cleats, coal quality, pressure, and temperature, influence the adsorption of CO2 in coal seams. To conduct this investigation, multiple coal samples were collected from the study area and subjected to proximate analysis, ultimate analysis, scanning electron microscopy (SEM), Fourier transform-infrared (FT-IR), Brunauer – Emmett–Teller (BET), and measurement of CO2 adsorption rates on the coal samples. Samples were characterized based on their geochemical properties, then pore and fracture properties and maximum adsorption of CO2 gas were determined. The interrelationship between the genetic properties of coal with the adsorption rate of CO2 gas was established. These coals lie mesopore in category with the presence of fractures and hydrogen bonds. The result of BET and kinetics rate indicates that the adsorption of gas was unrestricted multilayer type, and the maximum adsorption of CO2 gas at 50 bar is 2.15 moles gas/kg sample, respectively. [ABSTRACT FROM AUTHOR]

The Paleogene coal deposits of the Jaintia Hills of Meghalaya have undergone examinations by various researchers, primarily focusing on organic petrography and geochemistry and highlighting the rank, type, and grade, with perspectives on potential utilization. However, the genesis of these coals has received limited attention from the researchers. This research article addresses this gap by conducting a comprehensive examination of the geochemical and mineralogical aspects of these coals. Coal samples from two coal seams at nine locations in the Sampar coalfield in Jaintia Hills were collected and studied. The samples are subjected to X-ray fluorescence spectroscopy, X-ray diffraction analyses, Fourier transform infrared spectroscopy, proximate, and ultimate analysis to study geochemical and mineralogical composition and ash yield. The study utilizes various geochemical proxies based on the inorganic constituents, providing insights into the paleo-depositional conditions and contributing to a deeper understanding of the unique characteristics of Meghalayan coals. The research indicates that these coals were formed in coastal swamps and lagoons on stable platforms, experiencing minimal tectonic activity, influenced by seawater incursions. These coals were deposited in reducing to significantly reducing conditions and warm and humid to semi-arid climatic conditions. No signature of a geothermally active fluid has been recorded. [ABSTRACT FROM AUTHOR]

Coal is a primary and conventional energy source, but it also adversely impacts the environment. To mitigate the adverse effects of fossil fuels, the world is compelled to switch to more environmentally friendly resources like shale gas and coal bed methane (CBM). In India, coal has been mined and utilized for more than a century, but now it is high time to use the coal resource more cleanly. In this regard, CBM can be a good alternative. It is essential to mark out the coal seams which pose a high CBM generation potential. The study aims to determine the relationship between methane content and adsorbed gas content with coal characteristics and its depth of occurrence. In the present study, an investigation was carried out on the coal samples from the Sohagpur coalfield to detect the relation mentioned above. Vitrinite reflectance was calculated, which ranges from 0.85% to 1.08%. Adsorbed gas content and methane content were calculated using proximate analysis results and the coal seam depth. The study revealed that these coals are High Volatile Bituminous in rank. Also, Methane content increases with vitrinite reflectance and fixed carbon. As the depth increases, the value of gas content also increases. [ABSTRACT FROM AUTHOR]