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Integration of exergy and economic optimization for green hydrogen and power co-generation based on sorbent-enhanced biogas reforming with CO2 capture

CO2回収を伴うソルベント強化バイオガス改質に基づくグリーン水素と電力のコジェネレーションのためのエクセルギーと経済的最適化の統合 (AI 翻訳)

Arthur-Maximilian Báthori, C. Cormos

Systems and Control Transactions2026-06-19#水素Origin: EU経営インパクト: コスト削減対象セクター: cross_sector
DOI: 10.69997/sct.195497
原典: https://doi.org/10.69997/sct.195497

🤖 gxceed AI 要約

日本語

本研究は、CO2回収を組み込んだソルベント強化バイオガス改質（SE-SMR-CaL）システムから、50,000 Nm3/hのH2を生産し、一部を電力に転換するプロセスを解析。エクセルギー経済分析とPINCH法による熱統合を実施し、水素分割率の最適化により、LCOEを30.5 €/MWh以下に抑えつつ、LCOHとのトレードオフを定量化した。本手法は、産業脱炭素化への適用可能性を示す。

English

This study analyzes a sorbent-enhanced biogas reforming system with integrated CO2 capture (SE-SMR-CaL) producing 50,000 Nm3/h of H2, with partial hydrogen split to power generation. Using exergy-economic analysis and PINCH heat integration, the optimization reveals that LCOE can be kept below 30.5 €/MWh at the expense of higher LCOH, demonstrating a trade-off and technical feasibility for multi-vector energy systems.

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

日本ではバイオマス利活用と水素社会実現が進む中、本論文のSE-SMR-CaL技術は、農業廃棄物等からのグリーン水素製造と電力コジェネの経済性評価を提供する。ただし、日本独自の政策や補助金制度との連携は論じられていないため、日本の実装には追加の検討が必要。

In the global GX context

This paper provides a techno-economic optimization framework for a CO2 capture-integrated hydrogen and power co-generation system, relevant to global CCUS and hydrogen deployment. Its findings on LCOE-LCOH trade-offs inform investment decisions for flexible multi-vector plants, supporting energy transition strategies in regions with biogas availability.

👥 読者別の含意

🔬研究者:Offers a rigorous exergy-economic optimization method for integrated hydrogen-power systems with carbon capture, useful for process design and scale-up studies.

🏢実務担当者:Provides cost benchmarks (LCOE <30.5 €/MWh) and trade-off insights for biogas-to-hydrogen projects considering co-generation.

📄 Abstract（原文）

In the urgent effort to reduce greenhouse gas (GHG) emissions in the industrial sector, biogas-derived green hydrogen and power co-generation represents a promising solution. Biogas, a renewable and carbon-neutral resource, provides a flexible feedstock for decentralized energy systems, particularly in regions with well-developed agricultural or waste biomass infrastructure. This approach allows the deployment of cost-efficient systems aligned with climate targets and industrial decarbonization roadmaps. Compared to steam methane reforming (SMR), sorbent-enhanced SMR (SE-SMR) with integrated calcium looping (CaL) CO2 capture reduces process emissions while enhancing hydrogen yield. This study investigates the economic and exergy-based implications of partially splitting hydrogen from a SE-SMR-CaL system producing 50, 000 Nm3/h of H2 from desulfurized biogas. Following heat integration using the PINCH methodology, an electrically self-sufficient base case was established. Economic and exergy analyses were conducted in Excel, with cash flow allocation based on exergy contributions. An automated optimization routine identified competitive levelized costs of electricity (LCOE) and hydrogen (LCOH). Results show that increasing the hydrogen split to power generation maintains nearly constant LCOE (<% variation) while reducing overall exergy efficiency. Partial hydrogen splitting achieves LCOE below 30.5 €/MWh at the expense of increased LCOH, highlighting a trade-off between electricity and hydrogen economics in flexible, multi-vector systems. The workflow demonstrates that incorporating electricity generation into a sorbent-enhanced hydrogen production system using air combustion is technically and economically feasible.

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