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Taking Emissions Down Another Notch

Posted on March 1, 2010

Inland waterways cargo ship, the M/V Anda, owned by J.Verdonk of the Netherlands, has taken emissions reduction a step further by adding an aftertreatment to the engine exhaust. Two sets of a multi-component aftertreatement systems, one on each engine, were supplied and installed by Emitech B.V.

Each system consists of a NOx selective catalytic reduction (SCR) catalyst, a NOx control unit, ureum tank, two pieces of urea doseur, a NOx sensor and a NOx buster Bluejet G2 control. Each engine exhaust was also fitted with a diesel particulate filter (DPF) with a burner and control unit.

In January 2010, tests were carried out to measure the emissions of the two engines with the aftertreatment compared to without aftertreatment. In the tests carried out by TNO Industrie en Techniek under the protocols of ISO 8178, the aftertreatment system showed that on both engines the NOx emissions are reduced on the weighted test points by almost 90%. This brings the NOx emissions on both engines to well below the norm of 2 g/kWh for new ships.

A pair of Cummins QSK38-M engines supplied by De Groot Scheepstechniek B.V. provides main propulsion, producing a continuous rating of 895 kW at 1800 r/min. These engines employ a modular common rail fuel system to provide constant high injection pressure regardless of speed or load conditions.

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