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Corrosion of Carbon Steel in High Pressure Syngas with Low Level Additions of H2S, H2O, CO2 and O2

高圧合成ガスにおける低濃度H2S、H2O、CO2、O2添加時の炭素鋼の腐食 (AI 翻訳)

Thomas Joris Remans, Peter van den Brink, Bhaskar Sarkar, Prathamesh Shenai, Mousa Abuhelaiqa, Michiel Huisman, Fedwa El‐Mellouhi, Nicholas Laycock

CORROSION📚 査読済 / ジャーナル2026-05-29#CCUSOrigin: Global
DOI: 10.5006/4937
原典: https://doi.org/10.5006/4937

🤖 gxceed AI 要約

日本語

本論文は、合成ガス（一酸化炭素と水素の混合ガス）中での炭素鋼の腐食について、実験と現場測定による系統的な研究を報告する。プロトン移動反応質量分析を用いて、ガス中のカルボニル濃度を測定し、温度や微量不純物（H2S、H2O、CO2、O2）の影響を調べた。結果、清浄な合成ガスでは腐食速度は0.1 mm/yr未満だが、ppbレベルのH2Sで強く促進され、ppmレベルのO2で抑制されることを明らかにした。また、Langmuir-Hinshelwoodモデルで反応を記述した。

English

This paper systematically investigates carbon steel corrosion in syngas (CO+H2) using PTR-MS and industrial wall thickness monitoring. It finds that clean syngas gives <0.1 mm/yr corrosion, but ppb H2S strongly accelerates and ppm O2 inhibits corrosion. A Langmuir-Hinshelwood model describes the reaction.

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

本論文は合成ガス環境下での材料腐食に焦点を当てた基礎研究であり、日本のGX政策（SSBJ、有報等）とは直接的に関連しない。ただし、CCUSや水素インフラの材料選定において参考となる可能性がある。

In the global GX context

This is a materials science study on syngas corrosion, not directly tied to climate disclosure or transition finance. It may inform infrastructure durability for CCUS or hydrogen projects globally.

👥 読者別の含意

🔬研究者:Material scientists and corrosion engineers seeking mechanistic understanding of carbonyl corrosion in syngas systems.

📄 Abstract（原文）

It has been known for over a century that carbon steel corrodes in syngas at moderate temperatures due to reaction with carbon monoxide to form gaseous iron pentacarbonyl, Fe(CO)5. However, commercially produced syngas also contains various minor contaminant species, and their impact on corrosion remained unclear. In this work, experiments have been carried out for carbon steel in syngas flowing through a reaction chamber, using Proton Transfer Reaction Mass Spectroscopy (PTR-MS) to measure the carbonyl concentration in the effluent gas. We have investigated the effects of temperature and contaminants (H2S, H2O, CO2 and O2). For comparison, we have also used online ultrasonic wall thickness monitoring of piping in an operating industrial plant. Results show that in clean syngas containing 21 bar CO and flowing at up to ~ 5 m s-1, the corrosion rate peaks at ~ 200C, but remains &amp;lt; 0.1 mm/yr. The corrosion process is very strongly catalyzed by ppb levels of H2S, much less strongly activated by H2O and CO2, and can be inhibited by ppm levels of oxygen. Both in the laboratory and field work, corrosion rates up to ~ 0.2 mm/yr have been measured. The peak in the temperature dependence of corrosion rate is caused by a transition from kinetic control at lower temperatures to thermodynamic control at higher temperatures, but the position of the peak is dependent on the flow rate and other details of the experimental setup. The carbonyl corrosion reaction has been modeled using the Langmuir-Hinshelwood (LH) formalism for interactions at the gas-solid interface.

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