Geothermal-powered green hydrogen pilot using AEM electrolyser begins construction in Indonesia
State-owned energy giant Pertamina sees the project as a stepping stone toward producing green ammonia and methanol in the future.
Project Overview & Rationale
Pertamina, Indonesia’s state energy company, has broken ground on a pilot project in Ulubelu to produce green hydrogen powered by geothermal energy. This initiative uses an AEM (Anion Exchange Membrane) electrolyser to split water into hydrogen and oxygen, using electricity generated from geothermal sources.
The vision is that this pilot will pave the way for future production of green ammonia and methanol, leveraging hydrogen as a key feedstock.
Technology & Approach
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The electrolyser technology chosen is AEM, which is favorable for compatibility with renewable, variable power sources and uses anion exchange membranes rather than acidic or alkaline membranes.
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The energy input comes from geothermal, which offers a relatively stable and continuous electricity supply compared to intermittent renewables.
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By combining geothermal power with electrolyzer technology, the project aims to minimize CO₂ emissions associated with hydrogen production.
Strategic & Market Implications
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For Pertamina, the Ulubelu pilot is a strategic stepping stone in entering markets beyond fossil fuels, toward green ammonia and methanol.
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It demonstrates an integrated renewable-to-fuel pathway, leveraging Indonesia’s geothermal resources.
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Success of the pilot could catalyze scaling up, attracting investment and technology interest in other geothermal regions.
