Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 33, Pages 17587-17594Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.03.074
Keywords
Cumulative energy demand; Electrolysis; Gasification; Global warming; Life cycle assessment; Steam reforming
Categories
Funding
- Spanish Ministry of Economy, Industry and Competitiveness [ENE2015-74607-JIN AEI/FEDER/UE]
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Life cycle assessment (LCA) is a methodology for evaluating the environmental performance of product systems. A specific LCA harmonisation initiative has been undertaken regarding hydrogen, aiming to improve the robustness of comparative LCAs by developing harmonisation protocols and libraries of life-cycle indicators. This study fills the gap in existing libraries by calculating harmonised carbon and energy footprints of hydrogen for new case studies involving various production pathways.
Life cycle assessment (LCA) is a well-established methodology for the evaluation of the environmental performance of product systems. However, a large number of combinations of methodological choices is possible in LCA studies, threatening consistency when comparing different authors? studies. Regarding hydrogen, a specific LCA harmonisation initiative has recently been undertaken. Within the framework of this initiative, harmonisation protocols and libraries of life-cycle indicators of hydrogen have been developed in order to improve the robustness of comparative LCAs. Nevertheless, these libraries are currently affected by the lack of fossil-based hydrogen options. Hence, this study fills this gap by calculating harmonised carbon and energy footprints of hydrogen for a set of 15 new case studies involving relevant production pathways: gasification, reforming and autocatalytic decomposition of fossil feedstock, and electrolysis powered by fossil and grid electricity. Overall, the resulting extended library of harmonised life-cycle indicators stresses the role of renewable hydrogen as a key requirement in the path towards an environmentally-sustainable hydrogen economy. ? 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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