水素点源の排出量定量化を最適化するための制御放出実験
Controlled-Release Experiment to Optimize Emission Quantification of H 2 Point Sources (原題)
Westra, Iris M., Scheeren, Hubertus A., Penninga, Mareen J., van Heuven, Steven M.A.C., Meijer, Harro A.J.
🤖 gxceed AI 要約
日本語
水素は間接温室効果ガスであり、エネルギー転換に伴う漏出排出の定量化が重要です。本研究では、高感度GC-PDHIDシステムとUAV・地上サンプリングを組み合わせ、8kW電解装置からの制御放出実験により、水素排出量を高精度で推定する手法を最適化しました。14のダウンウィンドプロファイルから、平均排出量0.94 m3/hを導出し、メタン測定戦略が水素にも適用可能であることを示しました。
English
Hydrogen is an indirect greenhouse gas, and quantifying fugitive emissions is crucial for the energy transition. This study optimizes a method using a high-sensitivity GC-PDHID system with UAV and ground sampling, validated through controlled releases from an 8 kW electrolyzer. From 14 downwind profiles, a weighted mean emission rate of 0.94 m3/h was derived, showing that methane measurement strategies are transferable to hydrogen point sources.
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
日本は水素社会の実現を目指しており、水素サプライチェーン構築が進む中、漏出排出の正確な計測は温暖化対策と国際的な信頼性確保に不可欠です。本手法は国内の水素関連プロジェクトにおける環境影響評価や報告に貢献できる可能性があります。
In the global GX context
Globally, as hydrogen scales up, accurate emission quantification is vital for climate accounting and policy. This study provides a practical, accessible method for measuring hydrogen fugitive emissions, supporting the development of robust MRV frameworks and aligning with international efforts to mitigate indirect greenhouse gas effects.
👥 読者別の含意
🔬研究者:Provides a validated method for hydrogen emission quantification, transferable from methane measurement strategies.
🏢実務担当者:Offers a practical approach for monitoring hydrogen leaks in production and transport, aiding compliance and environmental reporting.
🏛政策担当者:Informs the development of emission factors and monitoring guidelines for hydrogen infrastructure.
📄 Abstract（原文）
The global energy transition is expected to increase atmospheric hydrogen concentrations through fugitive emissions during production, transport, storage, and use, with loss rates potentially reaching up to 10% of total hydrogen production. This is of concern since atmospheric H 2 oxidation lengthens methane’s lifetime, enhances tropospheric ozone, and increases stratospheric water vapor, making hydrogen an indirect greenhouse gas. Until recently, climate-relevant H 2 emissions, producing downwind enhancements below 1 μmol mol –1 (ppm), were undetectable due to the lack of sensitive measurement techniques. Using our multiplatform active AirCore sampler with a newly developed high-resolution Agilent 8890 GC-PDHID system capable of simultaneously measuring H 2 (±2 ppb), CH 4 (±0.5 ppb), and CO 2 (±0.3 ppm), we built upon our previous work and further optimize our sampling and emission estimation method through controlled H 2 release experiments using an 8 kW electrolyzer emitting 1.1 ± 0.1 m 3 h –1 (1.65 ± 0.15 g min –1 under standard atmospheric conditions). We investigate the role of different sampling conditions (i.e. sampling duration and plume coverage) on the accuracy of emission quantification. From a total of 14 downwind profiles collected using both UAV and ground-based sampling, we derived a weighted mean hydrogen emission rate of 0.94 ± 0.06 m 3 h –1 , with uncertainty driven by plume coverage, data resolution and spacing, and wind variability. The observed H 2 plume behavior closely matches that of tracers such as CH 4 , indicating that established methane measurement strategies are transferable to hydrogen point sources. Our work facilitates future H 2 emission measurements by demonstrating the versatility and accessibility of our proposed measurement method.
🔗 Provenance — このレコードを発見したソース
- base https://hdl.handle.net/11370/e2b9f485-bb5c-4364-a832-631b9407e1f0first seen 2026-09-01 12:07:23
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