Multi-model assessment of global hydrogen trade under Paris-aligned scenarios
This study harmonizes two global energy models to reveal that while hydrogen trade is essential for Paris-aligned decarbonization, it will likely remain more regionally concentrated with limited international liquid trade, contrasting with current policy narratives that overemphasize global markets.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Hydrogen is often described as the fuel of the future, a clean energy carrier that could help the world move away from burning coal, oil, and gas. Unlike fossil fuels, which release carbon dioxide when burned, hydrogen can be produced using renewable electricity and water, emitting only water vapor when used. Currently, most hydrogen is made from natural gas and used within industrial complexes, often right next to where it is created. However, as the world seeks to limit global warming to 1.5 or 2 degrees Celsius, the role of hydrogen is expected to expand dramatically. It could power heavy trucks, heat factories, and fuel ships, sectors that are difficult to electrify directly. Because the sun shines and the wind blows in different places with different strengths, some regions will be able to make hydrogen much cheaper than others. This reality has sparked a global conversation about whether countries should trade hydrogen across oceans, much like they trade oil and gas today, to balance supply and demand.
A team of researchers at University College London and the International Institute for Applied Systems Analysis set out to test the reality of this global hydrogen market. They wanted to know if the ambitious trade plans announced by governments around the world actually fit with the most efficient, low-cost paths to a clean energy future. To find the answer, they did not rely on a single computer model or a single set of assumptions. Instead, they brought together two of the world's most sophisticated energy system models, TIAM-UCL and MESSAGEix, to run a series of parallel simulations. These models act like detailed digital twins of the entire global economy, calculating how energy flows from production to consumption under strict climate rules. The researchers asked these models to map out the path to a 1.5-degree and a 2-degree world, testing different scenarios: what if hydrogen trade is easy to access? What if governments force trade targets that might be too high? And what happens if we remove international trade entirely?
The simulations revealed a future that is more local and less global than many current political strategies suggest. While hydrogen will indeed become a massive part of the global energy mix, growing from its current level to supply between 90 and 130 exajoules per year by the end of the century, the trade of this fuel will look very different from the trade of oil. The models show that the vast majority of hydrogen movement will happen within regions, traveling through pipelines or short-distance trucks rather than crossing oceans. In the most ambitious climate scenarios, the amount of hydrogen traded internationally as a liquid on ships is projected to be quite small, reaching only between 1 and 6 exajoules per year by 2050. This international trade is also expected to arrive later than many hope, not becoming a significant part of the system until the 2050s or even the 2060s, once the local infrastructure is already established.
This finding stands in sharp contrast to the current wave of national hydrogen strategies, where dozens of countries have set bold targets for importing or exporting hydrogen by 2030 and 2050. When the researchers forced their models to meet these specific government targets, the results showed a clear mismatch. The trade volumes required to hit these policy goals were more than double what the models predicted would be the most cost-effective path. In these "policy-driven" scenarios, hydrogen trade appeared decades earlier than in the cost-optimized scenarios, and the volumes were far higher. The researchers suggest that while these targets show political will, they may be out of step with the physical and economic realities of building a new global energy system. If countries build massive export infrastructure based on these overly optimistic targets, they risk creating expensive assets that sit idle because the global demand does not materialize as quickly as planned.
The study also highlighted which parts of the world are likely to be the main players in this new economy. The simulations consistently pointed to regions like Europe, Japan, and South Korea as major importers, needing to bring in hydrogen because they lack the space or resources to produce enough locally. Conversely, regions with abundant renewable energy, such as Australia, parts of Latin America, and the Middle East, emerged as natural exporters. However, the models showed that even for these exporters, the market will not look like the centralized, global oil markets of the past. Instead, the hydrogen economy will be more distributed. Most countries will likely produce enough hydrogen for their own needs or trade with their immediate neighbors, relying on international shipping only for a small fraction of their total supply. This structure suggests that energy independence is more achievable than previously thought, provided countries focus on building local production and regional pipelines rather than waiting for a global shipping boom.
Ultimately, the research suggests that the path to a clean hydrogen future requires patience and coordination. The technology to trade hydrogen across oceans exists, but the economic case for it is not as strong or as immediate as the current political momentum implies. The models indicate that the most efficient way to decarbonize the world is to first build robust local and regional networks, allowing hydrogen to flow where it is cheapest to produce and most needed to consume. International trade will play a role, but it will be a supporting one, emerging slowly as the system matures. For governments, the lesson is clear: aligning national strategies with the slow, steady pace of infrastructure development and the realities of cost will be more effective than chasing aggressive trade targets that the global system may not be ready to support. The future of hydrogen is bright, but it will likely be built region by region, not shipped in a single, massive global wave.
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