Waste-to-hydrogen (WtH) technologies are proposed as a dual-purpose method for simultaneous non-fossil-fuel based hydrogen production and sustainable waste management. This work applied the life cycle assessment approach to evaluate the carbon saving potential of two main WtH technologies (gasification and fermentation) in comparison to the conventional hydrogen production method of steam methane reforming (SMR) powering fuel cell electric buses in Glasgow. It was shown that WtH technologies could reduce CO-eq emissions per kg H by 50–69% as compared to SMR. Gasification treating municipal solid waste and waste wood had global warming potentials of 4.99 and 4.11 kg CO-eq/kg H respectively, which were lower than dark fermentation treating wet waste at 6.6 kg CO-eq/kg H and combined dark and photo fermentation at 6.4 kg CO-eq/kg H. The distance emissions of WtH-based fuel cell electric bus scenarios were 0.33–0.44 kg CO-eq/km as compared to 0.89 kg CO-eq/km for the SMR-based scenario.

中文翻译：

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苏格兰格拉斯哥燃料电池电动公交车废物制氢系统的生命周期评估


废物制氢（WtH）技术被提议作为一种双用途方法，用于同时进行基于非化石燃料的氢气生产和可持续废物管理。这项工作应用生命周期评估方法来评估两种主要 WtH 技术（气化和发酵）的碳减排潜力，并与为格拉斯哥燃料电池电动公交车提供动力的蒸汽甲烷重整 (SMR) 的传统制氢方法进行比较。结果表明，与 SMR 相比，WtH 技术可以将每公斤 H 的 CO-eq 排放量减少 50-69%。气化处理城市固体废物和废木材的全球变暖潜势分别为 4.99 和 4.11 kg CO-eq/kg H，低于暗发酵处理湿垃圾的 6.6 kg CO-eq/kg H 和暗发酵与光发酵相结合的全球变暖潜势。 6.4 kg CO-eq/kg H。基于 WtH 的燃料电池电动公交车场景的距离排放为 0.33–0.44 kg CO-eq/km，而基于 SMR 的场景为 0.89 kg CO-eq/km。