Diesel Engine Applications
The Need for Diesel Emissions Control
Diesel engines require unique emission after-treatments. Diesel Particulate Filters (DPFs) capture particulate matter such as soot and burn it off. DPFs are used in diesel-powered cars, light trucks, heavy-duty trucks, and agricultural and construction vehicles, mining equipment, and stationary engines/generators, among others. DPFs are both for retrofits and original equipment manufacturers (OEMs). Diesel Oxidation Catalysts (DOCs) oxidize gaseous un-burned hydrocarbons and carbon monoxide into carbon dioxide and water. DOCs are used on OEM vehicles and as retrofit devices. DOCs are often also used in conjunction with DPFs.
Companies in these markets and their suppliers are struggling to find cost-effective solutions to meet the new EPA and EURO diesel regulations. For many of the applications, current products have high levels of customer dissatisfaction stemming from their high backpressure, high costs, relatively slow regeneration and supply problems. The GEO2 substrate is particularly well-suited to these applications because of its thermal properties, resistance to corrosion by ash and exhaust constituents, efficient filtration, durability and random matrix characteristics—both for DPF and DOC applications.
High Soot Capture Efficiency
GEO2 DPFs are designed to capture greater than 95%
of diesel soot for Level III filtration characteristics.
GEO2’s substrate is extremely efficient in filtering soot particulates and condensed aerosols from nano-meter size ranges to > 2.5 microns.
Reduced Backpressure
Backpressure from the DOC/DPF system robs engines of
fuel efficiency and power. GEO2’s material is designed to have lower backpressure than every commercially available DPF. The pore structure of the material allows many more available passageways for the exhaust gas to flow through, resulting in lower backpressure as soot loads the DPF.
Faster and Less Expensive Regeneration
GEO2’s material regenerates soot faster, more efficiently, and at a lower temperature than Silicon Carbide or Cordierite. A combination of lower weight, less backpressure and faster regeneration allows powertrain designers to create less expensive regeneration cycles for both active and passive regeneration systems. For example, powertrain designers can reduce the package size or lower the catalyst loading of the DPF in their application.
High Thermal Shock Resistance
GEO2’s material has high thermal shock resistance due to its base material characteristics, microstructure and strength at high temperatures. The base material in the material has a melting point greater than 1550 degrees C. The random matrix structure of the filter allows the filter to withstand high temperature differentials without cracking.
Resistance to Ash Corrosion
GEO2 filters and catalytic hosts are resistant to
corrosion in acidic or basic chemical environments.
This makes GEO2 technology ideal for use in chemically
harsh environments such as diesel exhaust.
Less Cost and Weight
GEO2’s material weighs less than the leading DPFs and can significantly reduce both unit and total system cost.
Enhanced Sound Muffling
The GEO2 substrate muffles noise. In addition to
catalytic abilities, the GEO2 substrate can also serve
as a sound muffling device. Dispersing sound waves
through the GEO2 substrate’s three dimensional
matrix architecture produces an attenuating effect,
thereby reducing noise caused by the powertrain.
Applications
- GEO2’s diesel technology works for both DPF
and DOC applications.
- Products are available for both OEM and retrofit
applications.
Filter Sizes and Shapes
- GEO2’s diesel technology is available in diameters
up to 12 inches.
- Typical channel configurations are 100 to 300 cells per square inch.
- Channels can be any shape that the customer desires.
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