Tag Archives: Selective Catalytic Reduction

IMO tier III regulations (on NOX for marine vessels) to include Selective Catalytic Reduction technology

Marine vessel engines produce Nitrogen Oxides (NOx) during the combustion of fossil fuel which adds more than 14% to the global NOx production. NOx are toxic acidic gases which results in smog formation, ground level ozone and acid rain. Upon reacting with NH3 (Ammonia), moisture and other components in the atmosphere, NOx forms nitric acid,

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IMO Tier III Regulations

These regulations set the stage for considerable further reductions of the permissible NOx emissions – with the first step (Tier II) already in force since January 2011. Tier III will become applicable after 2021, but only inside specifically designated emission control areas (ECAs), whereas, outside of these ECAs, the Tier II regulation will continue to

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Selective Catalytic Reduction

In the process of selective catalytic reduction a catalyst converts nitrogen oxides into diatomic nitrogen (N2) and water (H2O). Both of these are harmless when released, and are safe for the environment. The process for making this conversion is to combine the NOx with a reductant, typically ammonia (NH3), which then comes in contact with

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