(29d) Renewable Hydrogen Production Processes

Recently, reducing CO2 emissions has become a critical issue in addressing global warming. Below are the key processes for producing renewable hydrogen.

• Electrolytic Hydrogen Production:

- Water is electrolyzed using renewable energy sources (e.g., wind power) to generate hydrogen.

- The oxygen obtained from electrolysis is transported by LO2 tankers and supplied to the autothermal reactor at LNG receiving terminals.

• Methanation:

- Hydrogen generated from renewable energy and recycled CO2 is used to synthesize methane through the Sabatier reaction.

• High-Pressure Hydrogen Storage:

- High-pressure hydrogen storage is established to absorb fluctuations in electrolytic hydrogen production.

- Electrochemical isothermal compression cells are used for hydrogen storage.

• Transportation of Renewable LNG:

- Renewable methane is liquefied and delivered to consumers using LNG tankers.

• LNG Receiving Terminal and Renewable Hydrogen Production

- At the consumer site, the LNG is stored in the LNG storage tanks and renewable hydrogen is produced by the autothermal reactor with the transported oxygen

This concept may result in higher costs for consumers compared to fossil fuels, but it will help address the global warming issues that have persisted since the Industrial Revolution of the 18th century.