PM-Metalit Advanced - the Innovative Particulate Filter for Nanoparticle Reduction

摘要

Future emission legislation for passenger cars (petrol and diesel) and heavy-duty vehicles will require a reduction in particle numbers alongside a reduction in particle mass. Conventional filters that combine current levels of porosity with new, low soot-emitting engines are unable to filter nanoparticles with sufficient effectiveness due to the lack of a soot filter cake. The necessary reduction in pore size would lead to greater pressure loss. The PM Metalit Advanced represents a new generation of particulate filters for the automotive industry. Building on the proven partial-flow deep-bed concept the separation of nanoparticles in particular is improved by the application of electrostatic forces, which act as a diffusion and adhesion booster. The system is able to separate well over 90% of particles that have been charged in an electric field without any increase in backpressure. This paper describes the theoretical design, the construction and test results using the PM Metalit Advanced.