Ash filter, exhaust gas treatment system incorporating the same and method of using the same

摘要

An ash filter for a reciprocating piston internal combustion engine is disclosed. The ash filter includes a substrate, such as a honeycomb monolith substrate or a plurality of particulate substrates, and a matrix of a zeolite material disposed on the respective substrate or substrates, the matrix of the zeolite material configured to remove ash from an exhaust gas flow from a reciprocating piston internal combustion engine. An exhaust treatment system for a reciprocating piston internal combustion engine is disclosed. The exhaust treatment system includes an ash filter comprising a matrix of a first zeolite and configured to receive an exhaust gas flow from an engine; and an exhaust treatment device, the exhaust treatment device comprising a matrix of a second zeolite and configured to receive the exhaust gas flow from the ash filter.

主权项

1. An exhaust treatment system for a reciprocating piston internal combustion engine, comprising:
an ash filter comprising a substrate, the substrate comprising a honeycomb monolith comprising a plurality of flow-through flow channels separated by adjoining walls, wherein an exhaust gas flow through the flow channels does not flow through the adjoining walls, and a matrix of an uncatalyzed first zeolite and configured to receive an exhaust gas flow from an engine; an exhaust treatment device, the exhaust treatment device comprising a matrix of a second zeolite and configured to receive the exhaust gas flow from the ash filter; an SCR device configured to receive in operation the exhaust gas flow from the exhaust treatment device, the SCR device having an SCR catalyst; and a particulate filter configured to receive in operation the exhaust gas flow from the SCR device.