iSCR - Integrated Selective Catalytic Reduction

Introducing on-engine NOx abatement with iSCR

For vessels using aftertreatment to comply with NOx limits, a simple installation is key to unlocking advantages to both ship construction and operation. Integrated selective catalytic reduction (iSCR), the first on-engine NOx abatement solution for two-stroke marine engines, reduces the complexity of installing and commissioning.

Aftertreatment installation

Several factors need to be considered when integrating NOx abatement technologies into the vessel’s engine system, including:

  • Space demands in the engine room and/or funnel;
  • Special requirements for piping (safety considerations and extra space);
  • Multiple systems, controls and interfaces, often from different suppliers;
  • The combined engine and aftertreatment system can only be tested once it has been installed and connected.

An on-engine solution

WinGD’s iSCR can be applied on small- to medium-bore engines with one turbocharger, running on compliant low-sulphur fuels.

By integrating a high-pressure SCR unit onto the engine itself, iSCR offers the same proven NOx reduction capability with several other benefits:

  •  A single combined engine and SCR unit is easier to install;
  • Space needed for piping and other connections is minimised;
  • NOx aftertreatment does not add to the engine room footprint;
  • SCR controls are fully integrated into the engine control system;
  • The combined system can be factory tested, simplifying commissioning.

The result

Deploying an X-Engine with iSCR enables Tier III NOx compliance in a simple package that minimises the space needed in the engine room as well as providing significant savings in footprint and weight. For a 52cm bore engine, integrating SCR can reduce combined weight by more than a third.

WinGD has designed iSCR with a simplified maintenance concept for the catalyst and other elements, enabling crew to reduce the time spent looking after the system.

Read more about NOx reduction solutions for WinGD engines here.

For more information on WinGD’s range of environmental technologies, download our brochure here.