MAN ES to deliver NOx capture system to Mitsui E&S

German engine manufacturer MAN Energy Solutions (MAN ES) said it will begin series production of onboard large selective catalytic reduction (SCR) control systems.

PHOTO: MAN ES' SCR control system. MAN ES

An SCR control system is used onboard vessels to reduce nitrogen oxide (NOx) emissions from conventional marine engines. The system is also designed for future ammonia engines, MAN ES said.

The first SCR control system will be delivered to Japanese shipbuilder Mitsui E&S, MAN ES said. It has a diameter of 3,900 millimeters and weighs 28 mt, MAN ES said.

SCR uses catalysts to reduce NOx emissions from engines and convert them into nitrogen and water vapour. Metal oxides are usually used as catalysts in this process.

NOx is a potent greenhouse gas with a much higher global warming potential than carbon dioxide (CO2). Excessive NOx emissions can lead to ozone layer depletion.

The SCR control system has passed its factory acceptance test following a successful water-pressure test. It can “reduce nitrogen oxide [NOx] emissions by 90%,” when used on cruise ships and cargo vessels, the engine maker said.

By Aparupa Mazumder 

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