Preliminary communication
THE SELECTIVE CATALYTIC REDUCTION (SCR) APPLICATION ON TWO STROKE SLOW SPEED MARINE DIESEL ENGINES
Dean Bernečić
; Faculty of Maritime Studies Rijeka
Radoslav Radonja
; Faculty of Maritime Studies Rijeka
Abstract
A systematic approach to the problem of preventing air pollution from marine slow speed diesel engines, in accordance with the recently adopted international standards, has become necessary for the analysis of currently available methods of reducing emissions from which they would then be synthesized in an environmentally friendly and economically viable solution.
Subsequently, the main atmosphere pollutants from slow speed diesel engines synopsis have been summarized in this paper, the sources and reason of their formation and the problems linked with the selective catalytic reaction (SCR) have been explained too. The chemical reaction in a SC Reactor has been briefly explained, as well as, in general, the methods for the NOx reduction.
Since the modern slow speed diesel engines run with very low exhaust gas temperatures, on low engine loads the ammonium sulfate deposits formation problem have appeared. The paper aims at presenting the review and researching results carried out in Japan in 2009, which approved that the SCR application on board a ship is possible without significantly reducing engine or reactor performances.
The authors have also included their suggestions and considerations linked with new possibilities of SCR performances in combination with modern, electronically controlled, slow speed diesel engines.
Keywords
nitric oxides (NOx); Selective Catalytic Reduction (SCR); slow speed diesel engines; exhaust gas emission
Hrčak ID:
69632
URI
Publication date:
27.6.2011.
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