The influence of additionality and time-matching requirements on the emissions from grid-connected hydrogen production

Michael A. Giovanniello, Anna N. Cybulsky, Tim Schittekatte and Dharik S. Mallapragada ()
Additional contact information
Michael A. Giovanniello: MIT Energy Initiative, Massachusetts Institute of Technology
Anna N. Cybulsky: MIT Energy Initiative, Massachusetts Institute of Technology
Tim Schittekatte: MIT Energy Initiative, Massachusetts Institute of Technology
Dharik S. Mallapragada: MIT Energy Initiative, Massachusetts Institute of Technology

Nature Energy, 2024, vol. 9, issue 2, 197-207

Abstract: Abstract The literature provides conflicting guidance about the appropriate time-matching requirement between electricity consumption by electrolysers and contracted variable renewable energy (VRE) for qualifying hydrogen (H2) as ‘low carbon’. Here we show that these findings are highly influenced by different interpretations of additionality. Substantially lower consequential emissions are achievable under annual time matching when presuming that VRE for non-H2 electricity demand does not compete with VRE contracted for H2, as opposed to when assuming that all VRE resources are in direct competition. Further analysis considering four energy system-relevant policies suggests that the latter interpretation of additionality is likely to overestimate the emissions impacts of annual matching and underestimate those of hourly matching. We argue for starting with annual time matching in the near term for the attribution of the H2 US production tax credits, where conditions resemble the ‘non-compete’ framework, followed by phase-in and subsequent phase-out of hourly time-matching requirements as the grid is deeply decarbonized.

Date: 2024
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41560-023-01435-0 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:9:y:2024:i:2:d:10.1038_s41560-023-01435-0

Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/

DOI: 10.1038/s41560-023-01435-0

Access Statistics for this article

Nature Energy is currently edited by Fouad Khan

More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().