Teijin Device Reduces Ships’ NOx Emissions
Teijin Engineering has developed a selective catalytic reduction (SCR) denitration device for midsized ship engines to ensure compliance with the Tier III nitrogen oxides emissions regulation, which goes into effect in 2016. The company says ship tests have demonstrated that the device can reduce NOx emissions by 80 percent.
The company says it will initially supply the device on an OEM basis in June to Niigata Power Systems, an engine manufacturer and the co-developer of the product. Teijin Engineering says it plans to expand sales to other ship engine manufacturers, targeting annual sales of JPY 2.5 billion ($25 million) by 2016.
The SCR denitration device detoxifies emissions by mixing ammonia or liquid urea with exhaust gas that contains NOx and then passing the mixture through a catalytic layer to break down the NOx into nitrogen and water.
The company says the device ensures liquid urea is sprayed into the exhaust gas with high efficiency even as engine performance varies due to ocean swells and other navigational conditions. It analyzes oscillation and vibration to optimally position the catalytic layer for maximum NOx reduction. The device’s compact design enables installation in space-limited engine rooms, and with flexibility to ensure access when changing the catalyst, the company says.
Teijin Engineering has developed and marketed denitration devices for land-based equipment, primarily for in-house power generation at factories. With the new SCR denitration device, the company is now expanding into the ship-engine field to support efforts to clean up offshore environments.
Beginning in 2016, the International Maritime Organization will require compliance with the Tier III emissions rule, which calls for an 80 percent reduction of NOx emissions relative to the Tier I regulation.
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