同軸流非予混合火炎におけるアンモニア混焼コークス炉ガス（COG）の脱炭素化に関する研究
On Ammonia-Blended Coke Oven Gas (COG) in Coaxial-Flow Nonpremixed Flame for Decarbonization (原題)
Yuseon Jeon, Hyeon Taek Nam, Heejung Jung, Tae Young Kim, Seungro Lee
🤖 gxceed AI 要約
日本語
鉄鋼プロセスで発生するコークス炉ガス（COG）にアンモニアを混焼させ、同軸流非予混合燃焼器で燃焼・排出特性を実験と2Dシミュレーションで評価した。アンモニア混焼率の増加に伴い火炎長は短縮し、吹き消え限界は低下するもののメタンより高い安定性を維持した。OH-PLIF計測で火炎構造への影響は軽微と確認された一方、燃料由来NO生成によりNOxは大幅に増加した。低炭素型産業燃焼システム開発の基礎データを提供する。
English
This study experimentally and numerically evaluates ammonia-blended coke oven gas (COG) combustion in a coaxial nonpremixed combustor. Flame length shortened with higher ammonia ratios, and blow-off limits remained well above methane due to COG's high hydrogen content. OH-PLIF showed minimal flame-structure change, but NOx rose substantially from fuel-NO formation, providing a database for low-carbon industrial combustion.
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
鉄鋼業の脱炭素化は日本のGX実現の鍵であり、副生ガス活用とアンモニア混焼は産業部門のScope1削減策として注目される。NOx抑制と実機スケール検証が今後の実装課題となる。
In the global GX context
Ammonia cofiring in industrial combustion is central to hard-to-abate sector decarbonization under global net-zero pathways. This work informs the technical feasibility and NOx trade-offs relevant to steel and heavy industry transition planning.
👥 読者別の含意
🔬研究者:アンモニア混焼COGの火炎長・安定性・NOx特性に関する基礎データとして、燃焼モデル検証に活用できる。
🏢実務担当者:鉄鋼・産業炉でのアンモニア混焼導入検討時、安定燃焼とNOx増加のトレードオフを把握する材料になる。
🏛政策担当者:産業部門脱炭素の技術オプション評価とNOx規制の整合を検討する際の参考になる。
📄 Abstract（原文）
Abstract Coke oven gas (COG) is a promising byproduct gas generated in steelmaking processes because of its high heating value and large production volume. The large amount of hydrogen in COG contributes to combustion reactivity, flame stability, and decarbonization. Recently, a strategy for recycling COG cofired with other fuels has been proposed to support continued utilization. Ammonia is an attractive carbon-free fuel, a suitable candidate for cofiring with COG. In this study, the combustion and emission characteristics of ammonia-blended COG were investigated using a coaxial-flow nonpremixed combustor. Experiments evaluated the flame length, blow-off limit, and OH radical and NOx emissions. 2D simulation using ANSYS Fluent analyzed flame temperature and NO mole fraction. As a result, it was found that the flame length decreased with increasing ammonia blending ratio because of the reduced heat release rate and fuel reactivity. The normalized correlation based on Roper’s equation accurately predicts the flame length of COG, implying that COG can subsequently be interpreted as a general-purpose fuel. In addition, despite decreased blow-off limit of the ammonia-blended COG, it still maintained a significantly higher stability limit than methane due to the high hydrogen content of COG. OH-PLIF measurements revealed that the flame structure and reaction intensity were only slightly affected by ammonia blending, demonstrating the feasibility of ammonia-blended COG for stable combustion. NOx emissions increased substantially because of enhanced fuel-NO formation. This study provides a fundamental database for ammonia-blended COG under nonpremixed conditions and can contribute to the development of low-carbon industrial combustion systems.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1021/acs.energyfuels.6c03601first seen 2026-10-23 06:37:24
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