High-resolution numerical simulations of turbulent non-catalytic reverse water gas shift
乱流非触媒逆水性ガスシフトの高解像度数値シミュレーション (AI 翻訳)
Nils Erland L. Haugen, Axel Brandenburg, Ewa Karchniwy, Ole H. H. Meyer, AAsmund Ervik, Hursanay Fyhn, Ladan Samaei, B. Bringedal
🤖 gxceed AI 要約
日本語
本研究では、e-SAF製造向けの触媒フリー逆水性ガスシフト反応器の高解像度LESを実施。CO2中の微量O2がOHラジカルを介してCO生成を大幅に促進することを発見。燃焼用PaSRサブグリッドモデルが吸熱反応にも有効であることを示した。
English
This paper presents high-resolution LES of a catalyst-free reverse water gas shift reactor for e-SAF production. It shows that small O2 traces in CO2 significantly increase CO production via OH pool. The PaSR subgrid model performs well for endothermic reactions.
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
日本でもSAF（持続可能な航空燃料）の導入目標が設定されており、e-SAFの実用化が期待されています。本論文は触媒フリーRWGS反応器の数値シミュレーションにより、e-SAF生産プロセスの効率向上に貢献する知見を提供しています。
In the global GX context
This study contributes to the development of efficient e-SAF production, crucial for decarbonizing aviation globally. It provides insights into turbulence-chemistry interactions in endothermic reactors, relevant for reactor design and scaling.
👥 読者別の含意
🔬研究者:This paper provides fundamental insights into turbulence-chemistry interactions in endothermic RWGS reactors and validates LES subgrid models for such flows.
🏢実務担当者:The findings can guide the design of catalyst-free RWGS reactors for e-SAF production, especially regarding O2 impurity effects.
📄 Abstract（原文）
A green transition in aviation requires a drastic upscaling of Sustainable Aviation Fuel (SAF). The power-to-liquid process for the production of CO2-neutral jet fuel via electricity, called e-SAF, directly replaces fossil jet fuel without having to change infrastructure, aeroplanes, or jet-engines. The process combines green hydrogen with industrial exhaust gas, or captured carbon dioxide, in a circular economy concept. A key element of the e-SAF production plant is the reactor where syngas is produced. Traditional reactors use catalytic technology, which faces severe challenges due to the reduced performance over time because of catalyst degradation, clogging, and breakup due to embrittlement. A high-potential alternative is the catalyst-free reverse water-gas-shift (RWGS) reactor concept. The primary aim of this paper is to investigate the fundamental aspects of the catalyst-free RWGS process, such as reaction kinetics and the interactions between turbulence and chemistry. The secondary aim is to identify how a typical combustion subgrid scale models for Large Eddy Simulations (LES) perform when the chemical reactions are endothermic, in contrast to the strong endothermicity associated with classical combustion. It is found that even small traces of O2 in the CO2 stream can significantly increase the production rate of CO. This is attributed to the increased pool of OH. The effect is strongest at atmospheric pressure and less pronounced at higher pressure. By using the temporal jet framework to study turbulence-chemistry interactions, an algebraic equation for the prediction of the CO conversion time in a turbulent flow as a function of Damkohler number and chemical timescale is employed. Finally, it is concluded that the PaSR LES subgrid model designed for combustion reactions perform well also for the endothermic reverse water-gas-shift reaction.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://www.semanticscholar.org/paper/f5eefe33a56097bf2ccf3a3a8b0c3351844e2273first seen 2026-05-06 00:10:19
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