The SCR-HP reactor at Mitsui’s Tamano works

MAN Diesel & Turbo has developed a new high-pressure SCR for two-stroke engines based on a proven, four-stroke counterpart.

At an event in Tamano, MAN Diesel & Turbo and its licensee – Mitsui Engineering & Shipbuilding – introduced its new high-pressure Selective Catalytic Reduction system – MAN SCR-HP – to the market.
The MAN SCR-HP is available for two-stroke engines of all bore sizes and reduces – through internal catalytic reaction – NOx exhaust emissions to IMO Tier III limits. With specially developed honeycombs and honeycomb materials, as well as an integrated mixing unit, the overall size of the reactor has been drastically reduced compared to typical market designs and its medium-speed counterpart. MAN Diesel & Turbo expects to deliver the first system from the beginning of 2018.

Bjarne Foldager, vice president MAN Diesel & Turbo and head of sales and promotion two-stroke business, said: “The development of our new SCR is an important step on the path to a more sustainable future of shipping and global trade. At the same time it offers additional choices to ship owners worldwide, who can now choose from all NOx reduction technologies and select the optimal solution for their MAN Diesel & Turbo two-stroke engines. Furthermore it strengthens our position as the world’s leading system provider in the field of marine propulsion.”

Dr. Gunnar Stiesch, vice president MAN Diesel & Turbo and head of engineering engines, said: “The successful technology transfer from medium-speed design to two-stroke is this project’s major achievement. The reactor design has been driven by the desire to reduce the SCR system’s overall size, while still maintaining the effectivity of a much larger design. Reaching this target was only possible by focussing on key cornerstones of the design – the honeycombs as well as the reactor concept. For both components, we have collaborated with worldwide stakeholders to ensure that we offer the best possible design to the market, something I’m confident we have achieved.”

Source: Marine Propulsion