Diesel Particulate Filters
Particulate matter filters--also referred to as Diesel Particulate Filters (or DPFs) are one of the aftertreatment products available from Empire Emissions Solutions to lower emissions from the in-use population of diesel engines. PM Filters are used primarily to reduce PM, CO, and HC from diesel engine exhaust through catalytic oxidation and filtration. These filters are self-regenerating, which means they do not need to be replaced, but instead, will "burn off" the accumulated soot periodically. For proper regeneration, the exhaust temperature must exceed 260 degrees C at least 40% to 50% of the time and the sulfur content of the diesel fuel must not exceed 50 ppm. PM Filters can reduce PM, CO and HC by 80% to 90%.
CleanAir Permit Filter Brochure
How it works:
Diesel particulate filters physically trap emission particles in the exhaust. The diesel particulate filter is a porous filter material that combusts particulate matter through a combination of filtration and chemical reactions, similar to an oxidation catalyst. Diesel particulate filters can reduce hydrocarbons (HC), carbon monoxide (CO) and particulate matter (PM) by 90 percent.
Filters can be a costly solution and they must be used in conjunction with ultra low sulfur diesel fuel (ULSD). Before making the choice to use diesel particulate filters, certain requirements (such as fuel availability) will need to be discussed with your customer.
For a particulate filter to be used effectively, the engine must be run with ULSD – Ultra Low Sulfur Diesel fuel. The low sulfur content of this fuel, 15 parts per million (ppm) sulfur content or less, will help lessen some of the emissions output as well as enable the filter to work to its full potential. The availability of this fuel will be a deciding factor for your customer in the implementation of this solution.
As with any emissions retrofit solution, if your customer is investing in particulate filter technology, make sure the filter is designed for their application and duty cycle. An improperly applied filter can cause catastrophic failure – to the filter or possibly to the entire engine.