What BE.Hydrogen Is — and Is Not

Belgium’s Royal Institute of Natural Sciences is leading a geological survey to map subsurface formations that might host natural, or ‘white’, hydrogen. The programme is explicitly exploratory: it will collect seismic and geochemical data to assess whether hydrogen-generating reactions — typically serpentinisation of iron-rich rocks or radiolysis of water — are occurring at depth. No accumulation, flow rate, or commercially exploitable resource has been confirmed on Belgian territory. Calling this a discovery would be premature and inaccurate.

That said, the decision to fund the survey at all is a meaningful policy signal. Several European governments — notably France, where the BRGM has mapped promising Lorraine Basin structures — have moved from academic curiosity to funded exploration within a few years. Belgium, as a dense industrial economy with significant ammonia and refining infrastructure, would be a natural off-taker of locally sourced hydrogen if any were found.

Why Geological Hydrogen Changes the E-Petrol Equation

The standard critique of synthetic petrol — and of e-fuels generally — is well-founded: the well-to-wheel energy efficiency of an e-fuel powertrain runs roughly 13–20%, compared with 70–80% for a battery-electric vehicle, meaning roughly five times more renewable electricity is needed to move the same car the same distance. This is the core argument of Transport & Environment and the ICCT, and it is why e-fuels make most economic sense in sectors batteries cannot serve: long-haul aviation, deep-sea shipping, heavy long-distance trucking, and the approximately 1.4 billion combustion vehicles already on the road that will not be replaced overnight. The efficiency objection is, at its root, an argument about the cost of electricity. It weakens considerably when hydrogen is not manufactured by electrolysis but extracted geologically, because the renewable electricity input falls to near zero. Natural hydrogen, if commercially viable, does not erase the thermodynamic losses downstream — but it attacks the dominant cost driver. That is precisely why the BE.Hydrogen programme, modest as it is, is watched closely by e-petrol developers.

For context, Horse Powertrain’s H12 engine — a 1.2-litre range-extender unit running on 100% renewable fuel — achieves 3.3 L/100km on the WLTP cycle and 44.2% peak thermal efficiency, figures that approach diesel-class performance in a compact, CN6b/Euro 7-compliant package. AI-assisted engine calibration and pump-level demand modelling are already being used by fuel-system developers to optimise combustion maps for variable hydrogen-content synthetic fuels, ensuring that efficiency gains on the bench translate to real-world performance across a range of blend compositions. Cheaper hydrogen feedstock would move these vehicles closer to pump-price parity with fossil petrol — the commercial threshold that projects such as HIF Global’s Chilean plant and Porsche’s Haru Oni facility are racing to reach.

The Road From Survey to Supply

Even an optimistic outcome from the BE.Hydrogen survey would take years to translate into commercial supply. Exploration, appraisal drilling, resource certification, and infrastructure connection are a decade-long process at minimum, and Belgium’s geology is not obviously analogous to the cratonic formations in Mali or the Pyrenean foothills where natural hydrogen seeps have already been documented. The €3.5 million budget funds data collection, not wells.

For the synthetic-petrol industry, the relevance is therefore strategic rather than immediate: a confirmed European natural hydrogen resource would fundamentally alter the policy and investment calculus around the EU’s 2035 ICE exemption for e-fuels, giving regulators and automakers a domestic, non-electrolysis hydrogen pathway to point to. Until that data exists, the Belgian survey is best understood as exactly what it is — a rigorous, government-backed effort to find out whether the question is even worth asking.

Sources

• Belgium launches a national exploration programme for natural hydrogen | Institute of Natural Sciences
• Horse Powertrain reveals methanol REEV engine and generator – Power Progress

Featured image via Unsplash.