Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels
Renewable hydrogen (H _2 ) will play a pivotal role in the decarbonization of the energy and industrial sectors. However, during the transition to a clean energy system, the production of H _2 with electrolysis runs the risk of increasing carbon dioxide (CO _2 ) emissions if the electricity system i...
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| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/ada16d |
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| author | Bernhard Thaler Gerhard Pirker Nicole Wermuth |
| author_facet | Bernhard Thaler Gerhard Pirker Nicole Wermuth |
| author_sort | Bernhard Thaler |
| collection | DOAJ |
| description | Renewable hydrogen (H _2 ) will play a pivotal role in the decarbonization of the energy and industrial sectors. However, during the transition to a clean energy system, the production of H _2 with electrolysis runs the risk of increasing carbon dioxide (CO _2 ) emissions if the electricity system is still partly based on fossil fuels. The European Union has set ambitious targets for the production of H _2 and defined strict rules in delegated acts to the renewable energy directive, when H _2 produced with public grid electricity can be counted as renewable. This paper analyzes two grid criteria central to these rules, renewable energy share and CO _2 emission intensity, in several future scenarios of the European energy system. By uniquely focusing on the impact of H _2 production from the perspective of EU grid criteria, this study offers a novel assessment of how these regulations interact with the evolving energy landscape. Fulfillment of the renewable H _2 grid criteria strongly depends on the future build-out of renewable energy resources, electricity demand, and amount of domestically produced H _2 . In a scenario with ambitious renewable build-out until 2030, represented by current drafts of national energy and climate plans, many countries will meet the stated criteria. However, adding a high amount of domestically produced H _2 partly cancels out this effect. In a scenario with reduced renewable build-outs, comparable to historically achieved renewable resource additions, many fewer countries achieve the grid criteria. Finally, net CO _2 emission reductions are analyzed by comparing power sector emission changes with the opportunity emissions that result from fossil fuels replacements with H _2 . The results indicate that using H _2 in CO _2 intensive use cases can lead to emission reductions, even if grid criteria are below the thresholds defined in the delegated acts. However, reduced renewable energy expansion poses the risk of not achieving any emission reductions at all with the produced H _2 . |
| format | Article |
| id | doaj-art-3ab93a5673be438abdbffc28eeb39980 |
| institution | Kabale University |
| issn | 1748-9326 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj-art-3ab93a5673be438abdbffc28eeb399802025-01-14T18:41:23ZengIOP PublishingEnvironmental Research Letters1748-93262025-01-0120202401710.1088/1748-9326/ada16dHydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuelsBernhard Thaler0https://orcid.org/0000-0001-5412-1519Gerhard Pirker1Nicole Wermuth2https://orcid.org/0000-0003-1869-7689Large Engines Competence Center , Graz, AustriaLarge Engines Competence Center , Graz, AustriaLarge Engines Competence Center , Graz, Austria; Graz University of Technology, Institute of Thermodynamics and Sustainable Propulsion Systems , AustriaRenewable hydrogen (H _2 ) will play a pivotal role in the decarbonization of the energy and industrial sectors. However, during the transition to a clean energy system, the production of H _2 with electrolysis runs the risk of increasing carbon dioxide (CO _2 ) emissions if the electricity system is still partly based on fossil fuels. The European Union has set ambitious targets for the production of H _2 and defined strict rules in delegated acts to the renewable energy directive, when H _2 produced with public grid electricity can be counted as renewable. This paper analyzes two grid criteria central to these rules, renewable energy share and CO _2 emission intensity, in several future scenarios of the European energy system. By uniquely focusing on the impact of H _2 production from the perspective of EU grid criteria, this study offers a novel assessment of how these regulations interact with the evolving energy landscape. Fulfillment of the renewable H _2 grid criteria strongly depends on the future build-out of renewable energy resources, electricity demand, and amount of domestically produced H _2 . In a scenario with ambitious renewable build-out until 2030, represented by current drafts of national energy and climate plans, many countries will meet the stated criteria. However, adding a high amount of domestically produced H _2 partly cancels out this effect. In a scenario with reduced renewable build-outs, comparable to historically achieved renewable resource additions, many fewer countries achieve the grid criteria. Finally, net CO _2 emission reductions are analyzed by comparing power sector emission changes with the opportunity emissions that result from fossil fuels replacements with H _2 . The results indicate that using H _2 in CO _2 intensive use cases can lead to emission reductions, even if grid criteria are below the thresholds defined in the delegated acts. However, reduced renewable energy expansion poses the risk of not achieving any emission reductions at all with the produced H _2 .https://doi.org/10.1088/1748-9326/ada16dhydrogenEuropean Unionenergy systemsdecarbonizationrenewable energy |
| spellingShingle | Bernhard Thaler Gerhard Pirker Nicole Wermuth Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels Environmental Research Letters hydrogen European Union energy systems decarbonization renewable energy |
| title | Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels |
| title_full | Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels |
| title_fullStr | Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels |
| title_full_unstemmed | Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels |
| title_short | Hydrogen production with grid-connected electrolysis: scenario-based analysis of the EU criteria for renewable fuels |
| title_sort | hydrogen production with grid connected electrolysis scenario based analysis of the eu criteria for renewable fuels |
| topic | hydrogen European Union energy systems decarbonization renewable energy |
| url | https://doi.org/10.1088/1748-9326/ada16d |
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