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Development of a techno-economic model for dynamic calculation of cost of electricity, energy demand and CO2 emissions of an integrated UCG–CCS process

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  • Nakaten, Natalie
  • Schlüter, Ralph
  • Azzam, Rafig
  • Kempka, Thomas

Abstract

Underground coal gasification (UCG) allows for the utilization of coal reserves not exploitable due to unfavorable geology and economic boundary conditions. The present study examines underground coal gasification economics converting deep-situated coals into a high-calorific UCG synthesis gas. Utilizing UCG synthesis gas to fuel a combined cycle gas turbine (CCGT) considering CO2 capture and its subsequent storage (CCS) in the underground voids resulting from coal consumption, the coupled process offers an economic low carbon option to coal fired power generation for a study area in Bulgaria. The selected coal deposit is not suitable for conventional mining due to great depths, but it may be exploitable by UCG. Cost-effectiveness, CO2 emissions and energy demand of the coupled process are analyzed using a techno-economic model specifically developed for that purpose. Capital and operational expenditure are ascertained from calculations considering six dynamic sub-models describing the UCG-CCGT-CCS process flow and aiming at determination of the costs of electricity (COE). Calculation results show that COE account to 71.67 €/MWh considering 20.5% CCS costs and 79.5% emission charges. The results show that the coupled UCG-CCGT-CCS process should be considered as an economic and low carbon option for power generation for the selected study area.

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  • Nakaten, Natalie & Schlüter, Ralph & Azzam, Rafig & Kempka, Thomas, 2014. "Development of a techno-economic model for dynamic calculation of cost of electricity, energy demand and CO2 emissions of an integrated UCG–CCS process," Energy, Elsevier, vol. 66(C), pages 779-790.
    • Handle: RePEc:eee:energy:v:66:y:2014:i:c:p:779-790
    DOI: 10.1016/j.energy.2014.01.014
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    5. Christopher Otto & Thomas Kempka, 2017. "Prediction of Steam Jacket Dynamics and Water Balances in Underground Coal Gasification," Energies, MDPI, vol. 10(6), pages 1-17, May.
    6. Onyebuchi, V.E. & Kolios, A. & Hanak, D.P. & Biliyok, C. & Manovic, V., 2018. "A systematic review of key challenges of CO2 transport via pipelines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 2563-2583.
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    8. Krzysztof Kapusta & Marian Wiatowski & Krzysztof Stańczyk & Renato Zagorščak & Hywel Rhys Thomas, 2020. "Large-scale Experimental Investigations to Evaluate the Feasibility of Producing Methane-Rich Gas (SNG) through Underground Coal Gasification Process. Effect of Coal Rank and Gasification Pressure," Energies, MDPI, vol. 13(6), pages 1-14, March.
    9. Feng, Ye & Chen, Jinglong & Luo, Ji, 2024. "Life cycle cost analysis of power generation from underground coal gasification with carbon capture and storage (CCS) to measure the economic feasibility," Resources Policy, Elsevier, vol. 92(C).
    10. Eftekhari, Ali Akbar & Wolf, Karl Heinz & Rogut, Jan & Bruining, Hans, 2017. "Energy and exergy analysis of alternating injection of oxygen and steam in the low emission underground gasification of deep thin coal," Applied Energy, Elsevier, vol. 208(C), pages 62-71.
    11. Sungki Kim & Wonil Ko & Sungsig Bang, 2015. "Analysis of Unit Process Cost for an Engineering-Scale Pyroprocess Facility Using a Process Costing Method in Korea," Energies, MDPI, vol. 8(8), pages 1-23, August.
    12. Ma, Jianli & Li, Qi & Kühn, Michael & Nakaten, Natalie, 2018. "Power-to-gas based subsurface energy storage: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 97(C), pages 478-496.
    13. Liu, Huan & Guo, Wei & Liu, Shuqin, 2022. "Comparative techno-economic performance analysis of underground coal gasification and surface coal gasification based coal-to-hydrogen process," Energy, Elsevier, vol. 258(C).
    14. Prabu, V. & Geeta, K., 2015. "CO2 enhanced in-situ oxy-coal gasification based carbon-neutral conventional power generating systems," Energy, Elsevier, vol. 84(C), pages 672-683.
    15. Natalie Nakaten & Thomas Kempka, 2019. "Techno-Economic Comparison of Onshore and Offshore Underground Coal Gasification End-Product Competitiveness," Energies, MDPI, vol. 12(17), pages 1-28, August.

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