Self-Regenerating Particulate Trap Systems for Emissions and Methods Thereof

Synopsis

Patent 8,115,373 B2 describes innovative self-regenerating particulate trap systems and methods for emissions control. This invention provides a highly efficient, low-maintenance solution for continuously reducing harmful particulate matter and other pollutants, addressing a critical need in various industries for cleaner and more sustainable operations.

A core novel aspect of this invention is its unique self-regenerating mechanism, which integrates one or more corona discharge electrode devices with a catalyzed electrostatic attraction system. The corona discharge serves a dual purpose: it electrically charges carbon particles (soot) present in the exhaust stream and simultaneously generates highly reactive radicals, such as oxygen (O), hydroxyl (OH), and nitrogen dioxide (NO2). A portion of these charged carbon particles are then oxidized by the generated radicals directly within the exhaust stream, effectively converting them into gaseous compounds like nitrogen, carbon dioxide, carbon monoxide, and water. Concurrently, another portion of the charged carbon particles are attracted to a specialized flow-through, maintenance-free attraction system. This system features a substrate core with a catalyzed attraction surface, oppositely charged to the carbon particles, ensuring efficient collection. Crucially, the attracted particles on this surface are subsequently oxidized by the continuously produced radicals, which regenerates the attraction surface itself. This self-regeneration capability eliminates the need for frequent manual cleaning or energy-intensive active regeneration cycles, marking a significant advancement over conventional particulate filters. Furthermore, the system can actively convert nitrogen oxides (NOx) in the exhaust stream into less harmful nitrogen dioxide (NO2), offering a comprehensive approach to emission reduction.

The commercial potential for this self-regenerating particulate trap technology is substantial, promising to revolutionize emissions control across numerous sectors by offering a more efficient, economical, and environmentally friendly solution. Possible applications include:

• Automotive Industry (Diesel and Gasoline Engines): This technology is critical for meeting increasingly stringent emissions regulations for diesel engines in trucks, buses, and passenger cars, as well as for gasoline direct injection (GDI) engines. It provides a highly effective and lower-maintenance alternative to conventional Diesel Particulate Filters (DPFs), potentially reducing fuel consumption associated with regeneration cycles and lowering the total cost of ownership for vehicle fleets.

• Marine and Off-Highway Vehicles: Applicable to heavy-duty equipment such as construction machinery, agricultural vehicles, and marine vessels, where continuous and efficient particulate and NOx reduction is essential for compliance and environmental stewardship.

• Industrial Emissions Control: The system can be deployed in stationary combustion sources, including industrial boilers, power generation facilities, and incinerators, offering a continuous, low-maintenance, and highly effective solution for air pollution abatement.

• Small Engines and Portable Power Generation: Scalable for use in smaller engines found in generators, lawn equipment, and other portable power sources, addressing localized air quality concerns and extending the lifespan of such equipment.

• HVAC and Advanced Air Purification Systems: The underlying principles of electrostatic particle attraction and in-situ oxidation could be adapted for advanced air purification systems in commercial buildings, public spaces, and even residential settings, providing superior indoor air quality control without frequent filter replacement.

This patent offers a robust and innovative solution to complex emissions challenges, providing a compelling opportunity for licensees to lead in the development and deployment of next-generation clean air technologies across a broad spectrum of applications.