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Diesel Oxidation Catalysts (DOC): A Cost effective solution
Level I:
A DOC Muffler is an integrated catalytic converter and muffler that replaces your existing muffler and reduces unwanted tailpipe emissions from diesel engines. Extremely reliable and cost effective, DOC systems have been widely applied on school and urban buses, as well as refuse trucks and municipal vehicles. Both CARB and US EPA-verified for 1988-2006 model year engines rated from 150-600 hp DET’s DOC’s are top of the line systems and smart solutions. DOC Mufflers incorporate flow distribution and noise reduction elements, and, of course, a diesel oxidation catalyst (DOC). DOC’s are typically extruded ceramic substrates coated with a platinum-based precious metal catalyst. The catalyst allows a flameless, low temperature, burning or oxidation of diesel exhaust pollutants. A DOC typically removes between 15-30% of particulate matter (PM) emissions, and a portion of the carbon monoxide (40%) and hydrocarbon (60%) emissions.
DOC’s are the most cost-effective diesel emission reduction technology when considering ‘cost per percent reduction’. Based on current market pricing show, DOC Mufflers cost ½- to-2/3 of the ‘cost per percent reduction’ compared to DPF’s or partial filters. The main drawback of DOC Muffler technology is that they do not achieve the high PM reductions sought in some of the programs, like California’s Diesel Risk Reduction Program.
DOC Mufflers are extremely reliable and maintenance free with normal operation. DOC’s become activated above 150ºC, compared to diesel particulate filters (DPF’s) which require 200-240ºC. The DOC activation temperature is normally reached during engine idling or even light duty cycles. There are no minimum temperature requirements and they can be applied on a wide range of engine horsepowers (150-600 hp), model years (1988-2006) and duty cycles. |
