H2 and CO2 network strategies for the European energy system

Fabian Hofmann (), Christoph Tries, Fabian Neumann, Elisabeth Zeyen and Tom Brown
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Fabian Hofmann: Technische Universität Berlin, Fakultät III
Christoph Tries: Technische Universität Berlin, Fakultät III
Fabian Neumann: Technische Universität Berlin, Fakultät III
Elisabeth Zeyen: Technische Universität Berlin, Fakultät III
Tom Brown: Technische Universität Berlin, Fakultät III

Nature Energy, 2025, vol. 10, issue 6, 715-724

Abstract: Abstract Hydrogen and carbon dioxide transport can play an essential role in climate-neutral energy systems. Hydrogen networks serve regions with high energy demand, whereas emissions are transported away in carbon dioxide networks. For the synthesis of carbonaceous fuels, it is less clear which input should be transported: hydrogen to carbon point sources or carbon to low-cost hydrogen. Here we explore both networks’ potential synergies and competition in cost-optimal carbon-neutral European energy systems. In direct comparison, a hydrogen network is more cost effective than a carbon network, as it serves to transport hydrogen to demand and to point sources of carbon for utilization. However, in hybrid scenarios where both networks are present, the carbon network effectively complements the hydrogen network, promoting carbon capture from distributed biomass and reducing reliance on direct air capture. The layouts of the hydrogen and carbon dioxide networks are robust if the climate target is tightened to be net negative.

Date: 2025
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DOI: 10.1038/s41560-025-01752-6

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