Coal in Order to Reach Renewables: Carbon Capture, Synthetic Fuels, and the Atmospheric Ceiling
再生可能エネルギーを達成するための石炭:炭素回収、合成燃料、大気上限 (AI 翻訳)
Mireille Chiroleu‐Assouline, Michel Moreaux
🤖 gxceed AI 要約
日本語
大気中炭素上限の下で、石炭、標準的再生可能エネルギー、回収CO2と非標準的再生可能エネルギーから合成されるメタノールの最適利用を分析。炭素上限が非標準的再生可能エネルギーの導入に必要十分条件であり、補助金ではなく炭素価格がフィードバックを決定することを示す。最適なエネルギー利用順序は費用最小順とは異なり、石炭とメタノールが併用される。また、均一なピグー税では最適化を達成できず、貯蔵補助金が必要であることを明らかにする。
English
This paper analyzes the optimal use of coal, standard renewables, and methanol synthesized from captured CO2 and a non-standard renewable under an atmospheric carbon ceiling. It shows that a credible ceiling is necessary and sufficient to activate the non-standard renewable, and that the ceiling, not output subsidies, prices the feedstock. The optimal sequence departs from least-cost-first, with concurrent coal and methanol use, and a uniform Pigouvian tax is insufficient; a storage subsidy is required.
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政策では、CCUSや合成燃料(e-fuel)の位置づけが重要であり、本論文の理論的枠組みは、炭素価格と補助金の設計に示唆を与える。特に、SSBJ開示や移行計画において、CCUSの役割を評価する際の理論的根拠となる。
In the global GX context
This paper contributes to global climate policy debates on carbon capture and synthetic fuels, offering a theoretical foundation for policy design. It highlights the importance of credible carbon pricing and storage subsidies, relevant for ISSB-aligned transition planning and climate disclosure frameworks.
👥 読者別の含意
🔬研究者:Provides a rigorous theoretical model linking carbon capture, synthetic fuels, and renewable deployment under a carbon ceiling.
🏢実務担当者:Offers insights for companies considering CCUS and synthetic fuel investments, emphasizing the role of carbon pricing and storage subsidies.
🏛政策担当者:Informs policy design for carbon pricing and subsidies to activate CCUS and synthetic fuels, highlighting the need for a credible carbon ceiling.
📄 Abstract(原文)
We study the optimal use of energy from carbon emissions in an economy drawing useful energy from coal, a standard renewable, and methanol synthesised by combining captured CO2 with an otherwise inexploitable non-standard renewable, subject to a ceiling on atmospheric carbon. Captured CO2 carries a dual shadow value - atmospheric relief and productive feedstock - and we show that a credible ceiling is necessary and sufficient to activate the non-standard renewable: the ceiling, not any output subsidy, prices the feedstock that makes synthesis competitive. The optimal sequence departs from least-cost-first ordering, with coal and methanol used concurrently, and the pre-ceiling energy price may follow a U-shaped path driven by a rising shadow value rather than falling costs. A uniform Pigouvian carbon tax does not decentralise the optimum; a supplementary storage subsidy is required, and the net capture instrument is a subsidy or tax according to whether emission reduction dominates the coal rebound.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.65864/guhe3ctf7jfirst seen 2026-07-31 05:51:09 · last seen 2026-07-31 05:51:58
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