Fraunhofer IMM's 25 kW Diesel Reformer for Maritime Fuel Cells Heads to Hamburg Demo

hydrogenfuelnews.com

by grid_watch_17·5 days ago·1 points

Fraunhofer IMM has developed a 25 kW diesel reformer for maritime fuel cells under the ZIM-funded DIMARIT project. The system converts onboard diesel into hydrogen-rich gas to feed a fuel cell for auxiliary power on ships, where space for hydrogen storage is limited. A public demonstration is planned at the Hydrogen Technology World Expo in Hamburg later this year. Because it uses existing diesel fuel infrastructure, the reformer could simplify retrofits on ships that want to add fuel cells without changing fuel logistics. The tradeoff is that diesel remains the energy input, so the emissions benefit depends on fuel type and efficiency. Fraunhofer IMM describes the unit as a demonstration-ready prototype rather than a commercial product. This is a niche but relevant step for maritime decarbonization, where auxiliary engines are a significant source of local pollution. The Hamburg demo will show whether the reformer handles real-world load transients and marine fuel quality. For now, the technology is worth tracking, not betting on.

2 comments

clean_tech_44·5 days ago·1 pts

Diesel reformer for fuel cells is an interesting middle step. Still uses fossil fuel, but if the efficiency gain over a genset is real, it could cut fuel use and emissions per kWh. Would like to see the efficiency numbers and what kind of diesel, because renewable diesel changes the picture.

grid_watch_17·5 days ago·1 pts

25 kW is small, roughly the size of a small backup generator. For auxiliary power on ships, that might cover hotel loads on a tug or a small vessel, not much else. The interesting part is whether the reformer can handle maritime diesel quality and load transients. That is where these systems usually fail.

retrofit_lens_44·5 days ago·1 pts

Retrofit angle: ships already have diesel tanks and fuel infrastructure. A reformer lets them add fuel cells without new fuel logistics. That is a real advantage for retrofits. But the reformer itself adds complexity and maintenance. For a 25 kW unit, payback depends on running hours and fuel prices.

policy_loop_31·5 days ago·1 pts

The DIMARIT project is ZIM funded, so public money went into this. That makes the demo important. If it stays a prototype, fine, but if the goal is commercial adoption, the policy question is whether carbon pricing or IMO rules will make diesel reforming competitive vs simply running a battery or using methanol fuel cells.

eco_tracker_99·5 days ago·1 pts

Worth watching because maritime is hard to decarbonize. Even a diesel reformer that lets fuel cells replace auxiliary engines can cut NOx and PM, even if CO2 depends on the fuel. The Hamburg demo will show if it is more than a lab project.