A system for treatment of gasoline compression ignition engine exhaust includes components of a carbon monoxide absorber and a nitrogen oxide absorber, wherein nitrogen oxide comprises one or more compounds consisting of nitrogen and oxygen; an oxidation catalyst downstream of the carbon monoxide absorber; a close coupled reduction catalyst downstream of the nitrogen oxide absorber; an underfloor reduction catalyst downstream of the close coupled reduction catalyst; and an ammonia slip catalyst downstream of the underfloor reduction catalyst. A method for making the system includes aligning the components into the system; configuring the carbon monoxide absorber to capture and store carbon monoxide under cold start operation; configuring the nitrogen oxide absorber to capture and store nitrogen oxide, under cold start operation; and configuring the underfloor reduction catalyst and ammonia slip catalyst to in combination reduce slip ammonia released by the close coupled reduction catalyst under high load operation.

The present disclosure relates to a coated filter for filtering particulate matter from exhaust gases. The filter has a porous catalyst composition coating, said catalyst composition comprises a zeolite, copper and manganese. The present disclosure also relates to a method forming the coated filter as described herein and an exhaust system with a coated filter as described herein.

Disclosed are a honeycomb-like homo-type heterojunction carbon nitride composite material and a preparation method thereof, and an application of the honeycomb-like homo-type heterojunction carbon nitride composite material in catalytic treatment of waste gas. The preparation method includes the following steps: with two different carbon nitride precursors namely urea and thiourea as raw materials, weighing certain amounts of the urea and the thiourea, adding the urea and the thiourea into a crucible, adding a certain amount of ultrapure water, placing the crucible in a muffle furnace, and carrying out calcination molding. The honeycomb-like homo-type heterojunction carbon nitride prepared by the one-step method has good photocatalytic effect to catalytic degradation of NO; meanwhile, the honeycomb-like homo-type heterojunction carbon nitride composite material has the advantages of rich and easily-available production raw materials, good stability, reusability, etc., and has application prospects in the field of treatment of NO in the air.

An oxidation catalyst includes cerium dioxide particles and a metal oxide. The cerium dioxide particles contain an ancillary component that is at least one of lanthanum, aluminum, and iron. The metal oxide contains iron and manganese and is held by the cerium dioxide particles.

Disclosed herein are emission treatment systems, articles, and methods for selectively reducing NOx compounds. The systems include a hydrogen generator, a hydrogen selective catalytic reduction (H.sub.2-SCR) article, and one or more of a diesel oxidation catalyst (DOC) and/or a lean NOx trap (LNT) and/or a low temperature NOx adsorber (LTNA). Certain articles may comprise a zone coated substrate and/or a layered coated substrate and/or an intermingled coated substrate of one or more of the H.sub.2-SCR and/or DOC and/or LNT and/or LTNA catalytic compositions.

A diesel engine has an exhaust aftertreatment system which has a vanadium SCR catalyst for reducing some NOx in engine-out diesel exhaust and a trap for trapping any sublimated vanadium which may be present in exhaust which has been treated by a diesel oxidation catalyst, a diesel particulate filter, and a main SCR catalyst which are between the vanadium SCR catalyst and the trap.

An exhaust system according to an exemplary embodiment of the present invention includes a nitrogen oxide storing catalytic collector connected to an exhaust line and collecting a nitrogen oxide included an exhaust gas in a first temperature or less; a first selective catalytic reducer disposed at a rear portion of the nitrogen oxide storing catalytic collector and reducing a nitrogen oxide included in the exhaust gas; and a first urea injector disposed at the front side of the nitrogen oxide storing catalytic collector and supplying a urea solution when a temperature of the nitrogen oxide exceeds the first temperature.

Provided is a catalytic converter (1) for cleaning exhaust gases in pre catalytic converter vehicles. The catalytic converter (1) comprises a body of an elongated shape having a first end portion (11) and a second end portion (12). The first end portion (11) comprises an exhaust inlet (110) through which exhaust gases from the engine enters and the second end portion (12) comprises an exhaust outlet (120) through which the treated gases exit. The body has an internal space (14), wherein the internal space (14) at least partially comprises a plurality elongated passages (140) which are in fluid communication with said exhaust inlet (110) and exhaust outlet (120), the passages (14) being arranged at a density of 100-200 cells per square inch (cpsi).

An exhaust system according to an exemplary embodiment of the present invention includes a nitrogen oxide storing catalytic collector connected to an exhaust line and collecting a nitrogen oxide included an exhaust gas in a first temperature or less; a first selective catalytic reducer disposed at a rear portion of the nitrogen oxide storing catalytic collector and reducing a nitrogen oxide included in the exhaust gas; and a first urea injector disposed at the front side of the nitrogen oxide storing catalytic collector and supplying a urea solution when a temperature of the nitrogen oxide exceeds the first temperature.

A process for manufacturing an exhaust system for an internal combustion engine includes the steps: a) providing at least one exhaust gas-carrying component (12, 18) for the exhaust system (10); b) applying a basic material layer (24, 26) to at least one area of a surface of at least one of the exhaust gas-carrying components (12, 16) in a high-temperature application process; and c) applying a catalytically active material layer (28, 30) to the basic material layer (24, 26) in a low-temperature application process.