CO2回収・貯留はインドの炭素削減に貢献できるか：文脈明示的なライフサイクル分析からの知見
Can CO2 Capture and Storage Deliver Carbon Reductions for India? Insights from a Contextually-Explicit Life Cycle Analysis (原題)
Rajiv K. Srivastava, Yashvardhan Verma, Jayant Singh, Suprotim Ganguly, Udayan Singh, Vikram Vishal
🤖 gxceed AI 要約
日本語
インドのCCS経路（CO2-EORおよび専用地質貯留）について、石炭火力と製油所をCO2源とした文脈明示的LCAを実施。専用貯留は一貫して排出削減に寄与する一方、CO2-EORは増産炭化水素の燃焼により下流排出が大きく、正味削減効果は限定的。CO2利用率がEORの環境性能を支配し、正味ゼロ達成には高い利用率が必要と示された。
English
This study conducts a contextually explicit cradle-to-grave LCA of CCS pathways in India, covering CO2-EOR and dedicated geological storage from coal power and refineries. Dedicated storage consistently reduces emissions, while CO2-EOR yields substantial downstream emissions from incremental hydrocarbon combustion. The CO2 utilization factor dominates EOR performance, with high breakeven factors needed for net-zero.
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
日本はCCSをGX推進の重要技術と位置づけ、アジアでの貯留適地開発やJCM連携を進めている。インドのCCS評価は、日本企業の技術輸出やクレジット創出の可能性を検討する上で参考になる。
In the global GX context
As India pursues net-zero by 2070, this LCA provides critical evidence on CCS effectiveness, informing global climate policy and transition finance. It highlights the need for context-specific assessment, relevant to ISSB/TCFD disclosure of climate mitigation claims.
👥 読者別の含意
🔬研究者:CCSのライフサイクル評価手法とインド特有のパラメータを提供し、地域別LCA研究の基盤となる。
🏢実務担当者:CCSプロジェクトの投資判断やEORの環境リスク評価に活用でき、専用貯留の優位性を確認できる。
🏛政策担当者:CCS政策設計において、EOR依存のリスクと専用貯留の長期的な気候便益を考慮する必要性を示す。
📄 Abstract（原文）
Abstract India’s stated goal to achieve net-zero greenhouse gas (GHG) emissions by 2070 is expected to require large-scale deployment of carbon capture and storage (CCS). However, the climate mitigation potential of CCS pathways in India remains insufficiently evaluated from a life cycle perspective, both for CO2-enhanced oil recovery (CO2-EOR) and dedicated geological storage. This study presents a contextually explicit cradle-to-grave life-cycle assessment (LCA) of CO2-EOR and dedicated CO2 storage using coal-fired power plants and petroleum refineries as CO2 capture sources in the Indian context. The results show that dedicated geological storage in saline aquifers or depleted reservoirs consistently delivers reduced emissions than the incumbent cases. Meanwhile, CO2-EOR results insubstantial downstream emissions from combustion of the incremental hydrocarbons produced. Gross life cycle emissions for power-plant-sourced CO2-EOR and dedicated storage were estimated at approximately 1,810 and 244 kgCO2e/tCO2, respectively, while corresponding mean net emissions after displacement credits are approximately 918 and −649 kgCO2e/tCO2. For refinery-sourced CO2, mean net emissions are approximately 1,463 kgCO2e/tCO2 for CO2-EOR and −103 kgCO2e/tCO2 for dedicated storage (after accounting for displacement credits). The analysis further identifies the CO2 utilization factor as the dominant parameter controlling the environmental performance of CO2-EOR systems. Breakeven utilization factors required to achieve net-zero emissions were estimated at approximately 0.8 tCO2/bbl for power-plant-sourced CO2 and 5.2 tCO2/bbl for refinery-sourced CO2. The study demonstrates that CCS pathways cannot be treated uniformly as their mitigation effectiveness depends strongly on source characteristics, storage configuration, and operational performance. Furthermore, while CO2-EOR may support early CCS infrastructure development in India, dedicated geological storage offers substantially greater long-term climate mitigation potential.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.energyfuels.6c03221first seen 2026-09-14 04:43:29
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