Hydrogen as Part of a 100% Clean Energy System: Exploring Its Decarbonization Roles.

Today’s energy system uses a variety of fuels and energy carriers in molecular forms, such as coal, oil, and natural gas, each contributing to CO2 emissions (). As solar and wind levels grow and the energy system becomes more electrified, fossil molecular fuels will contribute a progressively smaller fraction of overall energy. As shown in , hydroelectric storage and molecules, such as coal and natural gas, provide substantial storage and dispatch functionality today that will become increasingly critical for electricity operation and stability. Emerging low-carbon gases, such as hydrogen, can support the efficient integration of renewables in the transition from today’s energy system to one that is 100% clean from a carbon emissions perspective. [ABSTRACT FROM AUTHOR]