Sustainable Gas Institute, Imperial College London, SW7 1NA London, UK; Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
Sustainable Gas Institute, Imperial College London, SW7 1NA London, UK; Department of Chemical Engineering, Imperial College London, London SW7 2AZ, UK.
Sci Total Environ. 2022 Jul 15;830:154624. doi: 10.1016/j.scitotenv.2022.154624. Epub 2022 Mar 17.
Future energy systems could rely on hydrogen (H) to achieve decarbonisation and net-zero goals. In a similar energy landscape to natural gas, H emissions occur along the supply chain. It has been studied how current gas infrastructure can support H, but there is little known about how H emissions affect global warming as an indirect greenhouse gas. In this work, we have estimated for the first time the potential emission profiles (g CO/MJ H) of H supply chains, and found that the emission rates of H from H supply chains and methane from natural gas supply are comparable, but the impact on global warming is much lower based on current estimates. This study also demonstrates the critical importance of establishing mobile H emission monitoring and reducing the uncertainty of short-lived H climate forcing so as to clearly address H emissions for net-zero strategies.
未来的能源系统可能依赖于氢气 (H) 来实现脱碳和净零目标。在类似于天然气的能源环境中，H 排放发生在供应链沿线。人们已经研究了当前的天然气基础设施如何支持 H，但对于 H 排放作为间接温室气体如何影响全球变暖知之甚少。在这项工作中，我们首次估计了 H 供应链的潜在排放特征（g CO/MJ H），并发现 H 供应链的 H 排放率和天然气供应的甲烷排放率相当，但根据当前估计，对全球变暖的影响要低得多。这项研究还表明，建立移动 H 排放监测和减少短寿命 H 气候强迫不确定性的重要性，以便明确解决净零战略中的 H 排放问题。
