Gasoline particulate filter

Abstract

The present invention relates to a particulate filter, which comprises a substrate comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of channels are outlet channels that are closed at the inlet end and open at the outlet end; and a layer of inorganic particles loaded on surfaces of porous walls in the inlet channels and/or outlet channels, wherein the layer of inorganic particles comprises inorganic particles having a small BET pore volume of no more than 0.5 cm3/g. The present invention also relates to a method for producing a particulate filter which includes applying inorganic particles or precursors thereof.

Dependencies are inferred from the claim text.