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コージェネレーション統合型HEFAプロセスによる廃油からジェット燃料製造のライフサイクルアセスメント

Life Cycle Assessment of Waste Oil-to-Jet Fuel Production via the HEFA Process with Integrated Co-generation (原題)

Li H, Wu J

Research Squareプレプリント2026-08-25#エネルギー転換Origin: CN経営インパクト: コスト削減対象セクター: aviation
DOI: 10.21203/rs.3.rs-10440075/v1
原典: https://doi.org/10.21203/rs.3.rs-10440075/v1

🤖 gxceed AI 要約

日本語

廃油由来の持続可能航空燃料（SAF）製造におけるHEFAプロセスにコージェネレーションを統合したHEFA-PGを提案し、LCAで環境性能を比較。電力脱炭素化やグリーン水素導入シナリオ下で、HEFA-PGは排出削減効果が高いが、系統脱炭素化が進むとその優位性は低下。風力由来の電解水素は炭素削減に有効だが、風力設備製造に伴う毒性影響が増大。現状では天然ガス改質水素が総合環境性能に優れ、原料収集・輸送と水素製造が主要な環境ホットスポット。

English

This study proposes a HEFA-PG process integrating combined heat and power into the conventional HEFA route for waste oil-to-SAF production, and compares environmental performance via LCA. Under grid decarbonization and green hydrogen scenarios, HEFA-PG offers significant emission reductions, but its advantage diminishes with deep grid decarbonization. Wind-powered electrolytic hydrogen cuts carbon but increases human toxicity due to wind equipment manufacturing. Natural gas reforming hydrogen currently shows superior overall environmental performance, with feedstock logistics and hydrogen production as key hotspots.

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

日本ではSAFの国産化目標（2030年までに国内需要の10%供給）があり、廃油原料の活用は廃食用油の需給逼迫や調達競争が課題。本研究成果は、HEFAプロセスの電化・水素調達の選択肢を定量的に示し、国内SAFサプライチェーン構築や補助金・規制設計に示唆を与える。

In the global GX context

Globally, SAF is a key lever for aviation decarbonization, and this LCA provides nuanced insights into the trade-offs of process integration and hydrogen sourcing. It highlights that the benefits of co-generation and green hydrogen depend on grid decarbonization and supply chain burdens, informing ISSB-aligned disclosure and transition planning for aviation fuel producers.

👥 読者別の含意

🔬研究者:Provides a comparative LCA framework for HEFA process variants and hydrogen pathways, useful for refining decarbonization assessments.

🏢実務担当者:Offers guidance on technology selection and hotspot identification for SAF production, aiding in sustainability reporting and procurement decisions.

🏛政策担当者:Informs policy on SAF incentives and hydrogen infrastructure, emphasizing the need to consider full life-cycle impacts.

📄 Abstract（原文）

<title>Abstract</title> <p>To reduce the reliance on external electricity and hydrogen in the hydroprocessing of waste oils for sustainable aviation fuel (SAF), this study adopts life cycle assessment (LCA) to compare the conventional HEFA process and the HEFA-PG process integrated with combined heat and power, and analyzes their environmental performance under power grid decarbonization and green hydrogen substitution scenarios. Taking 100 tonnes of bio-jet fuel as the functional unit, Aspen Plus simulation and the ReCiPe 2016 model are used to calculate environmental burdens. The results show that both bio-jet fuel pathways have far lower carbon footprints than fossil aviation kerosene. The HEFA-PG process delivers prominent emission reduction benefits through co-generated electricity, yet its carbon mitigation gains gradually decline with deep power grid decarbonization. Although wind-powered electrolytic hydrogen reduces carbon emissions, it leads to remarkably higher human toxicity potential (HTP), which mainly originates from the environmental loads of off-site sulfide tailings generated during wind power equipment manufacturing. Under current technical conditions, hydrogen produced via natural gas reforming presents superior comprehensive environmental performance. The toxicity drawbacks of electrolytic hydrogen can only be alleviated by cleaner production of wind power equipment or reasonable allocation of environmental burdens among co-products. Feedstock collection and transportation as well as hydrogen production are core environmental hotspots, and the HEFA-PG process is more applicable to low-carbon applications in the near and medium term of energy transition.</p>

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