オビ島（北マルク）自家発電所における電力システム脱炭素化のためのグリーン水素ロードマップ：現実的か？
Green Hydrogen Roadmap for Electricity System Decarbonization in Captive Power Plant in Obi Island (North Maluku): How Realistic? (原題)
Gandi Iswara, S. Silviana, Widayat Widayat
🤖 gxceed AI 要約
日本語
インドネシア・オビ島のニッケル精錬所を対象に、石炭自家発電をグリーン水素で代替する実現性を評価した。2.3GW・稼働率75%の代替には年約15.1TWhが必要で、水素発電効率55%を前提とすると水素約82万トン、電解用再エネ約45TWh（液化等含め約52TWh）を要する。これはインドネシアの再エネ拡大計画に比べ過大であり、島間水素輸送の制約もあり、近中期での実用化は困難と結論づける。段階的な再エネ導入と効率改善を組み合わせた移行戦略を提言する。
English
This study assesses whether green hydrogen can realistically power nickel smelters on Obi Island, Indonesia, replacing 2.3 GW of captive coal. Meeting 15.1 TWh/yr at 55% hydrogen-fired efficiency requires ~0.82 Mt of hydrogen and ~45–52 TWh of renewable electricity, far exceeding Indonesia's current renewable plans. Inter-island hydrogen transport adds further barriers, so green hydrogen is judged impractical near- to medium-term; a staged strategy of phased renewables, efficiency gains, and transitional options is recommended.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本のGX文脈では、海外サプライチェーン（ニッケル等の重要鉱物）の脱炭素化圧力と、水素・アンモニア混焼を含む電力脱炭素の実現性評価に示唆を与える。資源調達先の移行リスクを投資家・調達部門がどう評価するかの参考になる。
In the global GX context
Adds a hard-nosed quantitative reality check to the global green-hydrogen-for-industry narrative, relevant to transition finance and scope 3 supply-chain decarbonization for critical minerals. It illustrates how renewable resource constraints and transport losses shape credible corporate transition plans under ISSB/TCFD disclosure.
👥 読者別の含意
🔬研究者:水素ベース産業脱炭素のエネルギー収支・輸送損失を定量化する手法の実例として有用。
🏢実務担当者:重要鉱物サプライヤーの脱炭素計画の実現性と移行リスクを調達・Scope3評価に反映する際の参考になる。
🏛政策担当者:水素戦略を再エネ拡大計画や段階的移行策と整合させる必要性を示す。
📄 Abstract（原文）
Nickel smelting on Obi Island, North Maluku, relies on captive coal power and faces pressure to decarbonize. Green hydrogen is a proposed low carbon alternative by Government of Indonesia, but its feasibility depends on renewable energy availability, system efficiency, and hydrogen transport. This study asks whether green hydrogen can realistically supply electricity to these smelters. It combines three elements: a bottom-up energy-balance calculation, alignment with Indonesia's renewable energy planning, and a qualitative screening of inter-island supply chain options (liquid hydrogen, ammonia as a hydrogen carrier, and direct renewable or hybrid alternatives). Replacing 2.3 GW of coal capacity at a 75% capacity factor requires about 15.1 TWh of electricity annually. With 55% efficiency for hydrogen-fired generation, this equals about 0.82 million tonnes of hydrogen, requiring about 45 TWh of renewable electricity for electrolysis and roughly 52 TWh including liquefaction and conditioning. This demand is large compared with Indonesia's current renewable expansion plans, and inter-island hydrogen transport adds infrastructure, energy loss, and readiness challenges. Green hydrogen is therefore unlikely practical for Obi in the near or medium term. A staged strategy combining phased renewable deployment, efficiency improvement, and transitional low-carbon options appears more feasible, with green hydrogen as a conditional long-term option.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1051/e3sconf/202675102005first seen 2026-11-07 05:32:45
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