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US 6,855,297 B2Granted
NOx filter
AssigneeHoneywell International Inc.
InventorsNorman Van Den Bussche, Peter M. Michalakos, James C. Williams, Roman Renneke, Robert Tom
Life of this patent
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Abstract
A filter includes a catalyst for oxidizing NOx to NO2 and an alkaline for adsorbing the NO2.
Claims13
A system comprising:
- a source of gas, the gas including NOx;
- and
- material for filtering the gas, the filter material including a catalyst for converting NO to NO2, the catalyst consisting of manganese dioxide and copper oxide, and an alkali for adsorbing the NO2, wherein the alkali is coated on particles of the catalyst.
An NOx filter comprising:
- a catalyst for oxidizing NO to NO2;
- a first support structure for the catalyst;
- an alkali for adsorbing the NO2;
- a second support structure for the alkali;
- the first support structure spaced apart from the second support structure and allowing the catalyst to be operated under conditions different than the alkali;
- and
- wherein the catalyst and the alkali are independently optimizable.
4 more elements
Apparatus comprising
- a CATOX;
- and
- a split layer PTF including a catalyst integrated with the CATOX and an alkali downstream from the catalyst, the catalyst oxidizing NO to NO2, the alkali adsorbing the NO2.
An environmental control system comprising:
- a CATOX;
- an air conditioning system (ACS) downstream from the CATOX;
- and
- a post treatment filter downstream from the CATOX, the filter including a catalyst and alkali.
1 more element
Dependencies are inferred from the claim text.