James Watt School of Engineering, University of Glasgow, G12 8QQ, UK.
James Watt School of Engineering, University of Glasgow, G12 8QQ, UK.
Bioresour Technol. 2022 Sep;359:127464. doi: 10.1016/j.biortech.2022.127464. Epub 2022 Jun 11.
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.
废物制氢（WtH）技术被提议作为一种双重用途的方法，用于同时进行非化石燃料基制氢和可持续的废物管理。本工作应用生命周期评估方法，评估了两种主要的 WtH 技术（气化和发酵）与传统的蒸汽甲烷重整（SMR）制氢方法相比，在为格拉斯哥的燃料电池电动巴士提供动力方面的碳减排潜力。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力分别为 4.99 和 4.11 kg CO-eq/kg H，低于暗发酵处理湿废物的 6.6 kg CO-eq/kg H 和暗发酵和光发酵联合处理的 6.4 kg CO-eq/kg H。与基于 SMR 的情景相比，基于 WtH 的燃料电池电动巴士情景的距离排放为 0.33-0.44 kg CO-eq/km，而基于 SMR 的情景为 0.89 kg CO-eq/km。
