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Electrolysis – High Temperature – Hydrogen

Stage: Development

INL has developed a high-temperature process the utilizes solid oxide fuel cells that are operated in the electrolytic mode. The first process includes combining a high-temperature heat source (e.g. nuclear reactor) with a hydrogen production facility by taking a stream of water and heating it and then splitting the water into hydrogen and oxygen product streams.

A second method uses several loops, including a primary heat loop, intermediate exchange loop, power generation loop, and hydrogen production facility thermally coupled to the intermediate heat exchange loop. The first flow path goes from the pump through the first and second heat exchanger and back to the pump. A mass of molten salt or helium is disposed during the first flow path.



The second flow path flows from the first heat exchanger to the third heat exchanger through a compressor and back to the first heat exchanger with the disposal of more molten salt or helium in the process. The third flow path goes from the second heat exchanger through the turbine, one recuperator, one compressor, and back to the second heat exchanger. This disposes of the carbon dioxide. Thus the molten salt expands in the turbine to generate power.   

INL Technology ID BA-233

Applications and Industries

Hydrogen, energy source, alternative energy, electrolysis, high temperature

Benefits

 -  More efficient electrolysis process.