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Technology options for reducing CO2 emissions in natural gas combined cyclesDíaz-herrera, P. René1, Ascanio-gasca, Gabriel2, Gonzalez-diaz, Abigail3
1Facultad de Ingeniería, Universidad Nacional Autónoma de México, Ciudad de México, México., 2Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Ciudad de México, México., 3Instituto Nacional de Electricidad y Energías Limpias, Cuernavaca, Morelos, México
E-mail: pablor.diazh@gmail.com
This work aims to compare three strategies for reducing CO2 emissions from natural gas combined cycles (NGCC): a) NGCC with post-combustion carbon capture (PCC) plant; b) NGCC operating with blue hydrogen (bH2) produced via SMR plus carbon capture, utilization and storage (CCUS) project; c) NGCC operating with a blend of green hydrogen (gH2) and natural gas. These mitigation strategies were analysed from the point of view of energy producers under the context of Mexico's clean energy market. Sensitivity analysis has been carried out varying fuel and clean energy certificate (CEC) prices. Results show that to meet the carbon emission factor mandatory by the law, fuels with high H2 content are required. In general, the incorporation of a PCC plant offers better economic performance than the other carbon mitigation alternatives studied. Although gH2, at current fuel prices, utilisation in NGCC is more expensive than installing a PCC facility, it can be competitive in a scenario of high prices of imported natural gas ($9/MMBTU) and very low renewable electricity prices ($20/MWh).
Palavras-chave: green hydrogren, blue hydrogen, carbon capture, hydrogen powered gas turbines.
Agradecimentos: Pablo René Díaz-Herrera would like to thank the Mexican National Council for Science and Technology (CONACyT) for the scholarship provided.