Measurement of CO2 Adsorption Capacity on Selected Turkish Coals for CO2 Sequestration Purposes

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Christian KEZA thesis.pdf

Date

2021-2

Author

BUNANI KEZA, BIENVENU CHRISTIAN

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The rapid industrialization in the nineteenth century caused an increase in energy consumption. This consumption is mainly met by burning fossil fuels which are the primary source of CO2 emissions. Geological storage is one option that can substantially reduce CO2 emissions in the atmosphere. In this work, the storage capacities of four different coal basins in Turkey have been estimated: Soma, Tunçbilek, Tekirdağ-Saray and Afşin-Elbistan. First, CO2 adsorption capacities of samples from the four coal basins were measured using the volumetric method at 40 °C and incremental pressures up to 85 bars. Four different adsorption models were found to fit experimental data well (Langmuir modified, Langmuir modified+k, D-R modified and D-R modified +k) with an average relative error of less than ±7 %. Among these, the D-R modified model was the best fitting model. Accordingly, maximum adsorption capacity for all coal samples (all on "daf" basis) was calculated. Moreover, the storage capacities of the four coal basins were calculated to be 62.1 Mt CO2 for Soma, 17.73 Mt CO2 for Tunçbilek, 4.91 Mt CO2 for Tekirdağ-Saray and 29.89 Mt CO2 for Afşin-Elbistan. It was estimated that Soma coal seam could store the CO2 emissions from a typical 100 MW coal power plant for about 102 years, Tunçbilek for about 29 years, Tekirdağ-Saray for about 8, and Afşin-Elbistan for 49 years.

Subject Keywords

Adsorption Isotherms, Carbon Dioxide, Volumetric Method, Carbon Sequestration, Coal Seams

URI

https://hdl.handle.net/11511/91690

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Northern Cyprus Campus, Thesis

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Citation Formats

B. C. BUNANI KEZA, “Measurement of CO2 Adsorption Capacity on Selected Turkish Coals for CO2 Sequestration Purposes,” M.S. - Master of Science, Middle East Technical University, 2021.