NOx Despite eFuels?
Why SCR Technology Remains Essential for Decarbonization
Choose sustainable propulsion solutions without compromises! Our SCR technology reduces NOx emissions by >90% – even when using eFuels.
The shipping industry is undergoing a historic transformation: eFuels are seen as a promising solution for a CO₂-neutral future. However, while they help reduce the carbon footprint, one issue remains – nitrogen oxides (NOx). Why is this the case? And how can H+H’s SCR technology help sustainably reduce these emissions?
Why is NOx Still a Problem with eFuels?
Whether fossil fuels or eFuels – combustion processes inevitably generate NOx due to fundamental physical principles. The main reasons:
✔️ Higher combustion temperatures of eFuels – more heat = more NOx formation
✔️ IMO Tier III remains mandatory – even ships running on eFuels must comply with strict NOx limits
✔️ New regulations and ECA zones – the expansion of NOx Emission Control Areas (ECA) makes efficient exhaust gas treatment essential
The Role of SCR Technology
Selective Catalytic Reduction (SCR) is a proven solution for reducing NOx emissions. A urea-solution, 32,5 or 40% (known as AdBlue in the automotive industry) is injected into the exhaust stream, where it converts to Ammonia – NH3, this reacts with nitrogen oxides on the SCR catalyst, breaking NOx down into harmless nitrogen (N₂) and water vapor (H₂O).
Advantages of H+H SCR Technology:
✅ >90% NOx reduction – regardless of the fuel type used
✅ DNV Type Approval – meets all regulatory requirements and reduces NOx below Tier III levels
✅ Flexible integration – customized solutions for new builds and retrofits
✅ Energy-efficient & low maintenance – minimal operating costs, maximum sustainability
Why SCR Will Remain Essential in the Future
While eFuels mark an important step toward climate-neutral shipping, NOx emissions will continue to be a challenge without SCR technology. With the ongoing expansion of NOx ECA zones, stringent IMO regulations and increasing local rules for emissions (e.g. Norwegian Fjords), shipping companies and engine manufacturers must rely on efficient exhaust gas treatment solutions.
📌 Conclusion: Decarbonization does not automatically mean improved air quality – effective NOx reduction remains essential.
H+H SCR systems provide a future-proof solution to meet strict regulatory requirements while ensuring the sustainable operation of your fleet.
Rely on efficient NOx reduction and secure your customized solution with H+H SCR technology.
Rely on efficient NOx reduction and secure your customized solution with H+H SCR technology.
H+H is Your Partner for Sustainable NOx Reduction!
📌 Over 30 years of experience in exhaust gas treatment
📌 In operation worldwide with leading shipping companies and engine manufacturers
📌 Reliable technology with proven performance
