ハイブリッド酸素燃焼・溶媒CO2回収による超低排出セメント生産
Ultra-low emissions cement production via hybrid oxyfuel-solvent CO2 capture (原題)
Cremona, Riccardo, Quevedo Parra, Sebastian, Gatti, Manuele, Romano, Matteo Carmelo
🤖 gxceed AI 要約
日本語
セメントクリンカー製造の脱炭素化に向け、予備焼成炉での部分酸素燃焼とMEA溶媒による燃焼後CO2回収を組み合わせたハイブリッドプロセスを提案・評価。50%酸素富化と3+3段予熱器が改修難易度と熱効率の最適バランス。廃熱利用で溶媒再生の熱自立を実現し、99%超の回収率を達成。RDF全量代替燃料併用時にはネットマイナス排出（-181.9 kg CO2/t clk）を実現し、高炭素税下で競争力が高い。
English
This paper proposes a hybrid cement decarbonization process combining partial oxy-fuel calcination with MEA-based post-combustion CO2 capture. A 50% oxygen enrichment with 3+3-stage preheater balances retrofit complexity and thermal efficiency. Waste heat from the clinker cooler enables thermal autonomy of solvent regeneration at >99% capture. With 100% RDF firing, net-negative emissions of -181.9 kg CO2/t clk are achieved, making it competitive under high carbon tax scenarios.
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
日本のセメント業界はGX推進法・カーボンプライシング導入を見据え、既存プラント改修型のCCUSに関心が高い。本論文は改修容易性と熱自立性を両立する設計を示し、国内セメント各社のロードマップ検討に実務的示唆を与える。
In the global GX context
Cement is a hard-to-abate sector central to ISSB/CSRD Scope 1 disclosure and transition finance. This hybrid retrofit design offers a credible pathway to near-zero or net-negative emissions, informing global decarbonization benchmarks and carbon pricing exposure assessments.
👥 読者別の含意
🔬研究者:ハイブリッドCCUSの熱統合設計と技術経済比較の方法論が参考になる。
🏢実務担当者:既存セメントプラントへの改修オプションと廃熱活用によるコスト低減の可能性を評価できる。
🏛政策担当者:高炭素税下でのCCUS普及には、廃熱利用型ハイブリッド回収への支援設計が有効である。
📄 Abstract（原文）
This paper proposes and evaluates a hybrid process for decarbonizing cement clinker manufacturing that combines partial oxy-fuel combustion in the pre-calciner with post-combustion CO 2 capture (PCC) using monoethanolamine (MEA)-based chemical absorption. Unlike traditional CCS approaches, this design aims to leverage the synergy between the two processes: partial oxyfuel calcination to efficiently tackle most of the direct CO 2 emissions from CaCO 3 calcination and solvent-based post-combustion CO 2 capture for processing both the rotary kiln flue gas and the unrecovered CO 2 from partial oxyfuel (i.e., the CO 2 purification vent stream). The study examines different designs and integration parameters for implementing this CO 2 capture solution in existing cement plants, identifying a configuration with 50% oxygen enrichment and a 3+3-stage preheater as the best balance between retrofit complexity and thermal efficiency. A key feature of this hybrid architecture is its thermal autonomy: heat integration analysis shows that waste heat recovered from the cement plant, especially exhaust air from the clinker cooler, can fully meet the solvent regeneration requirements, eliminating the need for auxiliary steam generation even at capture rates above 99%. Furthermore, the research highlights the decarbonization potential of combining this hybrid capture process for cement with 100% alternative fuel firing (RDF waste in the kiln and calciner). Under this scenario, the plant can achieve net-negative emissions of -181.9 kg CO2 /t clk . A comparative techno-economic analysis with alternative CO 2 capture technologies, such as post-combustion solvent process, full-oxyfuel, and partial oxyfuel, identifies the proposed hybrid process as a highly competitive strategy for deep decarbonization of cement making. Although partial oxyfuel configurations present marginally lower CO 2 avoidance costs, the hybrid process features a CO 2 avoidance rate close to 100% (or greater in case of biomass/waste fuel usage in the calciner), effectively coping with a high carbon tax scenario.
🔗 Provenance — このレコードを発見したソース
- Zenodo https://zenodo.org/records/23080836first seen 2026-10-02 04:11:55
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