Catalyst Block

“Catalyst block” means a block of certain dimension through which exhaust gas passes and which contains catalyst composition on its inside surface to reduce NOx from exhaust gas.

Source: Resolution MEPC.198(62), 2011 Guidelines addressing additional aspects to the NOx Technical Code 2008 with regard to particular requirements related to marine diesel engines fitted with Selective Catalytic Reduction (SCR) Systems, 15 July 2011, International Maritime Organization. Regulatory Guidance 

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