Back to results
US 10,837,335 B2Granted
Reactive filter for motor vehicle
AssigneesVolvo Truck Corporation, Centre National De La Recherche Scientifique, Universite Claude Bernard Lyon 1
InventorsAnne Giroir-Fendler, Sonia Gil Villarino, Eduard Emil Iojoiu
Life of this patent
Estimating the term…
Abstract
Disclosed is a reactive filter, that is a selective catalytic reduction filter or an oxidative reaction filter, including a porous substrate including internal pores having their inner surface, totally or partially, directly coated with a catalytic zeolite material resulting from an in situ hydrothermal synthesis. Also disclosed is a process for preparing such a reactive filter and the use thereof in an engine exhaust depolluting system.
Claims20
A selective catalytic reduction filter comprising:
- a porous substrate having a particulate filter function and a catalytic reduction function, the porous substrate having an intrinsic porosity comprised by 5% and 90% and an intrinsic mean pore size comprised between 0.1 pm and 100 pm, the porous substrate comprising internal pores each having an inner surface, totally or partially, directly coated with a catalytic zeolite material resulting from an in situ hydrothermal synthesis conducted inside an autoclave reactor, in which the porous substrate is contacted with a medium comprising water, at least one zeolite material precursor derivative, at least one active catalytic species precursor, and at least one zeolite structure template agent,
- wherein the inner surfaces of the internal pores are directly coated homogenously by the catalytic zeolite material in an absence of a binding substance, and
- wherein the selective catalytic reduction filter is configured to treat exhaust gas emitted by a vehicle diesel engine.
Dependencies are inferred from the claim text.