Integrated direct dimethyl ether synthesis process based on internal cycle of CO2: Technical economy and multi-criteria evaluation for carbon capture, utilization, and storage
CO2内部循環に基づく統合的直接ジメチルエーテル合成プロセス：炭素回収・利用・貯蔵のための技術経済・多基準評価 (AI 翻訳)
Yue Wang, Hossein Babaei
🤖 gxceed AI 要約
日本語
本研究は、内部CO2ループを分離負荷ではなく熱力学設計変数として組み込んだ直接ジメチルエーテル（DME）生産システムを提案。オートサーマル/ドライリフォーミング、酸ガス除去、直接DME合成、熱回収からなる10構成を評価。炭素利用率0.1918–0.3058、総エクセルギー破壊953.5–1096.5 MW。H2/CO比によりエクセルギー破壊の支配工程が変化。レベル化コスト480–761 USD/t、損益分岐価格16.75–26.59 USD/GJ。参照ガス価格では全てのケースでNPV負。内部CO2循環が炭素配分、エクセルギー分布、経済性を再形成する。
English
This study investigates a carbon-integrated direct DME production system using internal CO2 looping as a thermodynamic design variable. Ten configurations at 5000 MTPD capacity were evaluated with two H2/CO ratios and controlled CO2 recycling. Carbon utilization ranged 0.1918–0.3058, exergy destruction 953.5–1096.5 MW. At H2/CO=1, reforming dominates exergy destruction (63-67%); at H2/CO=2, synthesis dominates (72-78%). Levelized costs 480-761 USD/t, breakeven prices 16.75-26.59 USD/GJ. All cases yield negative NPV under reference gas price. Internal CO2 looping reshapes carbon partitioning, exergy distribution, and economic performance.
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CCUS/DME合成がグリーン成長戦略の一部として注目される。本論文の内部CO2循環による熱力学的統合設計は、日本のCCUSプロセス最適化やDME燃料導入の技術的基盤に示唆を与える。中国・イランの事例だが、CO2リサイクルの設計思想は日本の排出削減策にも応用可能。
In the global GX context
This paper advances CCUS by treating internal CO2 looping as a thermodynamic lever rather than a downstream burden. It provides detailed techno-economic benchmarks for direct DME synthesis with carbon capture, relevant to global decarbonization pathways for chemical fuels. The multi-criteria evaluation framework (carbon utilization, exergy, economics) offers a replicable methodology for optimizing CCUS-based fuel production worldwide.
👥 読者別の含意
🔬研究者:Internal CO2 looping as a design variable and exergy destruction shifting between reforming and synthesis offer novel insights for CCUS process optimization.
🏢実務担当者:Levelized cost and breakeven price data for DME production provide benchmarks for assessing CCUS project viability.
🏛政策担当者:Negative NPV under reference gas prices underscores need for carbon pricing or subsidies to make CCUS-based DME economically viable.
📄 Abstract（原文）
This study investigates a carbon-integrated direct dimethyl ether (DME) production system in which internal CO2 looping is implemented as a thermodynamic design variable rather than a separation burden. The integrated configuration comprises autothermal/dry reforming, acid gas removal (Rectisol or MDEA/PZ), direct DME synthesis, and heat recovery. Ten configurations at a fixed capacity of 5000 MTPD were evaluated under two target H2/CO ratios (1 and 2) with controlled internal CO2 recycling (λ_CO2), maintaining carbon balance deviations below 1%. System performance was assessed using carbon utilization, section-wise exergy destruction, and discounted cash-flow analysis. The carbon utilization index ranged from 0.1918 to 0.3058, while total exergy destruction varied between 953.5 and 1096.5 MW. A key finding is irreversibility relocation: at H2/CO = 1, reforming dominates exergy destruction (≈63%–67%), whereas at H2/CO = 2, synthesis becomes dominant (≈72%–78%). Techno-economic results indicate levelized costs of 480–761 USD t−1 and breakeven prices of 16.75–26.59 USD GJ−1. Under a reference gas price of 9.5 USD MMBTU−1, all cases yield negative net present values. The results demonstrate that internal CO2 looping reshapes carbon partitioning, exergy distribution, and economic performance, providing a multi-objective basis for rational process optimization.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1063/5.0332770first seen 2026-06-18 05:02:34
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