Life Cycle Assessment of Greenhouse Gas (GHG) and NO x Emissions of Power-to-H 2 -to-Power Technology Integrated with Hydrogen-Fueled Gas Turbine

Guohui Song (), Qi Zhao, Baohua Shao, Hao Zhao, Hongyan Wang and Wenyi Tan ()
Additional contact information
Guohui Song: School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Qi Zhao: China State Grid Shanghai Municipal Electric Power Company, Shanghai 200122, China
Baohua Shao: GreEnerMan Oy, Paraatikuja 6, 90630 Oulu, Finland
Hao Zhao: College of Engineering, Peking University, Beijing 100871, China
Hongyan Wang: School of Energy and Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China
Wenyi Tan: International Joint Laboratory of Green & Low Carbon Development, Nanjing 211167, China

Energies, 2023, vol. 16, issue 2, 1-14

Abstract: Hydrogen is expected to play an important role in renewable power storage and the decarbonization of the power sector. In order to clarify the environmental impacts of power regenerated through hydrogen-fueled gas turbines, this work details a life cycle model of the greenhouse gas (GHG) and NO x emissions of the power regenerated by power-to-H 2 -to-power (PHP) technology integrated with a combined cycle gas turbine (CCGT). This work evaluates the influences of several variables on the life cycle of GHG and NO x emissions, including renewable power sources, hydrogen production efficiency, net CCGT efficiency, equivalent operating hours (EOH), and plant scale. The results show that renewable power sources, net CCGT efficiency, and hydrogen production efficiency are the dominant variables, while EOH and plant scale are the minor factors. The results point out the direction for performance improvement in the future. This work also quantifies the life cycle of GHG and NO x emissions of power regenerated under current and future scenarios. For hydro, photovoltaic (PV) and wind power, the life cycle of the GHG emissions of regenerated power varies from 8.8 to 366.1 g CO2e /kWh and that of NO x emissions varies from 0.06 to 2.29 g/kWh. The power regenerated from hydro and wind power always has significant advantages over coal and gas power in terms of GHG and NO x emissions. The power regenerated from PV power has a small advantage over gas power in terms of GHG emissions, but does not have advantages regarding NO x emissions. Preference should be given to storing hydro and wind power, followed by PV power. For biomass power with or without CO 2 capture and storage (CCS), the life cycle of the GHG emissions of regenerated power ranges from 555.2 to 653.5 and from −2385.0 to −1814.4, respectively, in g CO2e /kWh; meanwhile, the life cycle of NOx emissions ranges from 1.61 to 4.65 g/kWh, being greater than that of coal and gas power. Biomass power with CCS is the only power resource that can achieve a negative life cycle for GHG emissions. This work reveals that hydrogen-fueled gas turbines are an important, environmentally friendly technology. It also helps in decision making for grid operation and management.

Keywords: power-to-H 2; hydrogen-fueled gas turbine; power regeneration; life cycle; greenhouse gas; NO x (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: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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