Techno-economic assessment and multi-objective optimization of CO2 hydrogenation via geothermal energy storage using synthetic natural gas, refrigeration, and freshwater production

Tao Hai, Abdullah Ali Seger, A S El-Shafay, Diwakar Agarwal, Ahmed Jassim Al-Yasiri, Husam Rajab, Moustafa S Darweesh, Lioua Kolsi, Chemseddine Maatki and Narinderjit Singh Sawaran Singh

International Journal of Low-Carbon Technologies, 2025, vol. 20, 289-302

Abstract: This study addresses the challenge of sustainable, multi-generational energy production by introducing an innovative geothermal-powered system for simultaneous methane, electricity, cooling, and freshwater generation. The configuration integrates a flash-binary geothermal power setup with an Organic Rankine Cycle, dual-effect absorption cooling, multi-stage flash desalination, and a solid oxide electrolyzer cell (SOEC) linked to a Sabatier reactor for CO2 hydrogenation. Financial analysis reveals annual revenue of $63.6 million, with operating expenses of $54.8 million and labor costs of $5.81 million, leading to a 7.3-year return on investment period. Optimized SOEC operation, including higher working temperatures, reduces voltage losses, improving energy efficiency.

Keywords: CO2 hydrogenation; renewable energy; natural gas generation; refrigeration; techno-economic and optimization (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:oup:ijlctc:v:20:y:2025:i::p:289-302.

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