Natural Gas–Hydrogen Blends to Power: Equipment Adaptation and Experimental Study

Ruben Valente, Jorge M. Costa and Nuno Soares Domingues ()
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Ruben Valente: Instituto Superior de Engenharia de Lisboa, Instituto Politécnico De Lisboa, Rua Conselheiro Emidio Navarro, 1, 1959-007 Lisbon, Portugal
Jorge M. Costa: Instituto Superior de Engenharia de Lisboa, Instituto Politécnico De Lisboa, Rua Conselheiro Emidio Navarro, 1, 1959-007 Lisbon, Portugal
Nuno Soares Domingues: Instituto Superior de Engenharia de Lisboa, Instituto Politécnico De Lisboa, Rua Conselheiro Emidio Navarro, 1, 1959-007 Lisbon, Portugal

Energies, 2025, vol. 18, issue 8, 1-12

Abstract: An experimental study was devised to assess the technical, environmental, and economic impact of incorporating hydrogen into natural gas. The experimental tests were conducted on a GUNT ET 792 demonstration unit, characterized by operating on a gas cycle in a twin-shaft configuration. The equipment was adapted to accommodate natural gas and mixtures of natural gas with hydrogen in volumetric fractions of 5%, 10%, and 20%. The tests carried out ensured the viability of using these mixtures from a safety perspective. On the other hand, it was possible to evaluate the main differences in the use of these fuel gases in terms of the temperatures and pressures that characterize the main points of the gas cycle, fuel injection pressures, air/fuel ratios, excess air, power output, overall cycle efficiencies, NO X and CO 2 emissions, and operational cost.

Keywords: energy transition; gas cycle; gas turbine; hydrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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