CO2 electroreduction: Sustainability analysis of the renewable synthetic natural gas.
In: International Journal of Greenhouse Gas Control, Jg. 114 (2022-02-01), S. N.PAG
academicJournal
Zugriff:
• Synthetic natural gas (SNG) by CO 2 electroreduction (ER) is matched to natural gas. • Significant CO 2 savings with SNG are possible under moderate ER performance. • Only high ER energy efficiencies (>60%) can lead to manageable OPEX. • By-product valorization or higher carbon taxes may be needed for profitability. Capture and utilization of industrial CO 2 emissions into low-carbon fuels is a promising alternative to store renewable electricity into chemical vectors while decarbonizing the economy. This work evaluates the viability pathways of producing synthetic natural gas (SNG) by direct CO 2 electroreduction (ER) in Power-To-Synthetic Natural Gas electrolyzers (PtSNG). We perform an ex-ante techno-economic (TEA) and life cycle analysis (LCA) for a 2030 framework in Europe. ER performance is varied in defined scenarios and assessed using a built-in process model of the PtSNG system, revealing uncharted limitations and benchmarks to achieve. Results show that substitution of fossil natural gas with renewable SNG could avoid more than 1 kg CO 2e /kg SNG under moderate ER conditions when using low-carbon electricity (< 60 kg CO 2e /MWh). SNG profitability for 2030 would rely on: i) higher CH 4 current densities (800–1000 mA/cm2), ii) improvements in energy efficiency (higher than 60%), and iii) valorization of the anodic product or additional carbon incentives. Our study proves that if market and technology evolve appropriately in the coming years, the SNG by CO 2 ER may be a mid-term climate change mitigation technology, among others. [Display omitted] [ABSTRACT FROM AUTHOR]
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CO2 electroreduction: Sustainability analysis of the renewable synthetic natural gas.
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Autor/in / Beteiligte Person: | Fernández-González, Javier ; Rumayor, Marta ; Domínguez-Ramos, Antonio ; Irabien, Ángel |
Zeitschrift: | International Journal of Greenhouse Gas Control, Jg. 114 (2022-02-01), S. N.PAG |
Veröffentlichung: | 2022 |
Medientyp: | academicJournal |
ISSN: | 1750-5836 (print) |
DOI: | 10.1016/j.ijggc.2021.103549 |
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