Diesel engine emission controlThe DPX diesel soot filter is designed to reduce emissions of smoke, carbon monoxide and hydrocarbons from diesel engines. Carbon monoxide and hydrocarbon reductions are achieved when the exhaust gases interact with the precious metal catalyst on the DPX ceramic filter. The catalyst is a thin coating on the ceramic walls. All the exhaust gases come in contact with the catalyst, the CO and HC are oxidised.
The DPX filter is made from a ceramic honeycomb with hundreds of parallel channels that form the filter media. To control the flow of exhaust gas, plugs are placed in the end of 50% of the channels (fig1), which form a chess board pattern. At the other end of the filter the other 50% of the channels are plugged. Since the outlet of the inlet cell is plugged, exhaust gases are forced through the porous ceramic honeycomb walls. When the gases, carrying the carbon particles flow through the walls, the carbon particles are filtered out of the exhaust gases. The combination of the catalytic convertor and the soot filter make the DPX filter essential technology for any location, where the exhaust fumes from diesel powered Gen-Sets create an environmental issue.