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Effect of sorption isotherm on CO2 storage capacity in Indian coal seam

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Abstract

The carbon dioxide (CO2) sequestration in a deep coal seam is one of the techniques to reduce global warming and mitigate climate change. The storage of anthropogenic carbon dioxide in a coal seam generally occurs due to the sorption of gas in the porous structure of coal. However, the sorption capacity varies with coal seam due to the variation in reservoir properties and environmental conditions. Therefore, in this paper, the aim of the study was to determine the gas sorption characteristics and their effect on carbon dioxide storage in coal. The volumetric method was used to determine the sorption capacity at variable pressure. Sorption isotherm was developed using the experimental data and correlated with established Langmuir and Freundlich models. Gas sorption capacity of coal samples was determined at 36 °C and 46 °C because of the variation of geothermal temperature in the study area. An increase in sorption capacity was observed with pressure. Decreased sorption capacity has resulted in elevated temperature. The shallower depth was found ideal for the successful CO2 storage. The Langmuir and Freundlich models were most suitable for determining sorption capacity in the study area. The isotherm constants indicated a favorable, normal, and cooperative sorption process.

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Acknowledgements

I express my thankfulness to the management of the University for the continuous help and assistance.

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Harinandan Kumar, author of the manuscript, has contributed in the planning and execution of research work, analysis of data, and writing of the manuscript.

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Correspondence to Harinandan Kumar.

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Responsible Editor: Santanu Banerjee

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Kumar, H. Effect of sorption isotherm on CO2 storage capacity in Indian coal seam. Arab J Geosci 16, 75 (2023). https://doi.org/10.1007/s12517-022-11167-2

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  • DOI: https://doi.org/10.1007/s12517-022-11167-2

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