Studies on Potential Green Hydrogen Production Based on Seawater Electrolysis In Central Java Coastal Area

Coastal areas have direct access to seawater sources and abundant renewable energy potential, such as wind power and solar energy. On the other hand, hydrogen as a clean and renewable energy source is increasingly receiving global attention due to its low carbon emissions. This study aims to explore the potential for hydrogen production through the electrolysis process using seawater as the main raw material. The process of electrolysis of seawater into hydrogen requires a stable electricity supply from renewable energy sources. The research method includes collecting and analyzing data on wind and solar energy potential in cities on the North Coast of Central Java. Through calculations using Faraday’s Law and the Ideal Gas Law, a theoretical relationship was obtained between the amount of electrical energy and hydrogen gas produced, which is 209 L/KWH. The results of the analysis revealed that cities on the north coast of Central Java that have the potential for electric power with wind turbines with a capacity of 120-300 MW with an accumulation of electrical energy between 220-550 GWH are Semarang, Jepara and Batang. The potential for wind energy to produce hydrogen gas is between 46-115 (million liters) per city and solar energy is capable of producing 79-125 (million liters) of hydrogen gas per year. The potential for electric power generated by Solar Cells with a capacity of 220-450 MW with an accumulated energy of 380-600 GWH can be generated in Semarang, Tegal and Kendal respectively. With an annual capacity of Solar Power Plants (PLTS), Semarang has a production capacity of between 62.5 - 75 (million liters) per year. Tegal City with a production capacity of between 50-61.25 (million liters) of hydrogen gas in coastal areas with stable solar radiation, is suitable for PLTS. Multicriteria analysis can help stakeholders make optimal decisions by considering trade-offs between various factors in determining the location in each city on the North Coast of Central Java that has the feasibility of green hydrogen production. This systemic approach is important to accelerate the sustainable energy transition.