持続可能な合成ガス生産に向けた代替炭素源との石炭共ガス化およびCO2回収・共利用の技術経済・環境評価
Techno-economic and environmental assessment of coal co-gasification with alternative carbon sources and CO2 capture and co-utilization for sustainable syngas production (原題)
Don Chinungi, Jeanne Louw, Johann F. Görgens
🤖 gxceed AI 要約
日本語
石炭ガス化の脱炭素化を目指し、天然ガス・バイオガス・回収CO2等との共ガス化8経路をAspen Plusでモデル化し、技術経済・環境評価を実施。石炭・天然ガス共ガス化＋CO2回収利用が合成ガス最低販売価格を25.4%低減し、GHGを44.3%削減。将来のグリーン水素価格と炭素税を考慮すると、炭素税が経済的収斂の主要ドライバーとなる。
English
This study models eight integrated gasification pathways in Aspen Plus to assess techno-economic and environmental performance of coal co-gasification with cleaner carbon sources and CO2 capture/utilization. Coal–natural gas co-gasification with CO2 utilization achieved a 25.4% lower syngas minimum selling price and 44.3% lower GHG emissions versus conventional coal gasification. Carbon taxation, more than green hydrogen prices, drives economic convergence between coal-only and alternative configurations.
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
日本は石炭火力の段階的廃止とアンモニア・水素混焼、CCUSの社会実装を進めており、炭素税が移行経路の経済性を左右する点はSSBJ・GX推進戦略下の企業戦略に示唆を与える。ただし対象は南アフリカの石炭化学であり、日本企業への直接適用は限定的。
In the global GX context
As global disclosure frameworks (ISSB, CSRD) push hard-to-abate sectors to quantify transition pathways, this study offers quantitative evidence that carbon pricing—not fuel switching alone—is the decisive lever for making coal-based syngas production economically viable under decarbonization. It contributes empirical techno-economic data relevant to transition finance and CCUS investment cases in emerging economies.
👥 読者別の含意
🔬研究者:共ガス化とCO2利用の統合モデルにおける炭素税感度分析の手法と結果を参照できる。
🏢実務担当者:炭素税導入下での石炭依存プロセスの経済性変化を把握し、CCUS投資判断の参考にできる。
🏛政策担当者:炭素税が石炭由来合成ガスの脱炭素移行を促す主要政策手段であることを示唆。
📄 Abstract（原文）
Syngas derived from coal gasification is an important resource for chemicals and fuels production globally. However, extensive use of coal emits large volumes of CO 2 and other pollutants to the environment. Conversely, alternatives such as natural gas, biogas, purified biomethane, and captured CO 2 present cleaner methods for transitioning to sustainable energy. This study conducted a techno-economic and environmental assessment of integrated gasification pathways to determine the cost and environmental optimal performances. One conventional coal gasification and seven alternative co-gasification steady-state process models were developed and simulated in Aspen Plus® v14. A full factorial design was used to investigate the impact of feedstock blending ratios and CO 2 recycle fraction on greenhouse gas emissions and syngas minimum selling price. The effects of plausible future green hydrogen prices and carbon taxation on the syngas minimum selling price were also evaluated. Co-gasification of coal and natural gas in a fixed-bed gasifier, with downstream CO 2 capture and utilization, demonstrated the best transitional potential, achieving a 25.4% lower syngas minimum selling price and lowering greenhouse gas emissions by 44.3% compared to the conventional base case. A syngas minimum selling price evolution analysis under green hydrogen and carbon tax future market conditions revealed that carbon taxation is the primary driver of economic convergence between coal‑only and alternative configurations. These results demonstrated that coal–methane co-gasification with CO 2 utilisation offers a robust and economically strong pathway for the staged decarbonisation of coal-based syngas production.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.enconman.2026.122183first seen 2026-09-18 04:43:59
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