Air filter assembly for low temperature catalytic processes
AssigneeDonaldson Company, Inc.
InventorsAndrew James Dallas, Mark Alan Gogins, Kristine Marie Graham, Daniel Adamek, Robert Skuster
Life of this patent
Estimating the term…
Abstract
An air filter assembly for removing particulate contaminants, chemical contaminants, or both, from an incoming dirty air stream. The resulting filtered or clean air is supplied to catalytic equipment, such as a fuel cell. The filter assembly can include a physical filter portion for removing physical or particulate contaminants, a chemical filter portion for removing chemical contaminants, or can have both portions.
Claims21
A filter assembly for use with a fuel cell having an air inlet, the filter assembly comprising:
- (a) a housing having an inlet and an outlet, the outlet configured for operable connection to the fuel cell air inlet;
- the housing inlet receiving dirty gas into the filter assembly, and the outlet receiving clean gas from the filter assembly;
- (b) a physical filter portion within the housing, the physical filter portion comprising pleated fibrous media and PTFE, the portion constructed and arranged to remove particulate contaminants from the dirty gas;
- and
- (c) a chemical filter portion within the housing, the chemical filter portion comprising carbon adsorbent material and constructed and arranged to remove chemical contaminants from the dirty gas.
A filter assembly for positioning in a gas stream, the filter assembly comprising:
- (a) a housing having an inlet and an outlet, the inlet receiving the gas stream into the filter assembly, and the outlet receiving cleaned gas stream from the filter assembly, the outlet operably connected to a gas inlet of a fuel cell;
- (b) a physical filter portion within the housing, the physical filter portion constructed and arranged to remove particulate contaminants from the gas stream;
- and
- (c) a chemical filter portion within the housing, the chemical filter portion comprising a first portion comprising impregnated activated carbon adsorption media constructed and arranged to remove ammonia and amines from the gas stream, and a second portion comprising impregnated activated carbon adsorption media constructed and arranged to remove acidic gases and organic materials from the gas stream.
A method of providing a gas stream to a gas inlet of a fuel cell, the method comprising:
- (a) providing a filter assembly comprising a physical filter portion and a chemical filter portion in a housing, the chemical filter portion comprising carbon absorbent material;
- (b) passing a dirty gas stream into an inlet of the housing of the filter assembly;
- (c) removing particulate material, chemical contaminants, and water from the dirty gas stream with the filter assembly to provide a clean gas stream;
- and
- (d) providing the clean gas stream from an outlet of the housing to the gas inlet of the fuel cell.
Dependencies are inferred from the claim text.