Exhaust fluid filter including hydrocarbon detection witness media
An aftertreatment system includes an exhaust reductant tank configured to store an exhaust reductant. A filter is fluidically coupled to the exhaust reductant tank. The aftertreatment system includes a hydrocarbon detection device configured to indicate the presence of a hydrocarbon in the exhaust reductant. A catalyst is included in the system and configured to treat the exhaust reductant flowing through the system. The hydrocarbon detection device can include a hydrophobic paper, and can be disposed in the filter.
1. A reductant filter comprising:
at least one wall defining an internal volume;
a filter element, at least a portion of the filter element being disposed within the internal volume; and
powder or particulates disposed within the internal volume, the powder or particulates configured to provide an indication of presence of a hydrocarbon in reductant upon contact with the reductant.
2. The reductant filter of claim 1 , wherein the at least one wall comprises a viewing portion disposed over the powder, the viewing portion being at least one of transparent or translucent.
3. The reductant filter of claim 1 , wherein the powder or particulates is configured to provide the indication in response to the reductant having a concentration of the hydrocarbon of between 0.025% by weight and 1% by weight, inclusive.
4. The reductant filter of claim 1 , wherein the indication is a change in color.
5. The reductant filter of claim 1 , wherein the filter element is configured to retain the powder or particulates within the reductant filter.
6. The reductant filter of claim 1 , wherein the filter element has a pore size of 10 microns, 5 microns, or 1 micron.
7. The reductant filter of claim 1 , wherein the powder or particulates comprises at least one of: wax, a styrene maleic anhydride copolymer, siloxane, nylon, acrylonitrile butadiene styrene, polycarbonate, cellulose, or polymethyl methacrylate.
8. The reductant filter of claim 1 , wherein the filter element is configured to filter at least one of dust, an organic particle, a crystal, or a solid particulate, from the reductant.
9. The reductant filter of claim 1 , wherein the filter element is formed from at least one of: cotton or acrylonitrile butadiene styrene.
10. The reductant filter of claim 1 , wherein the powder or particulates comprises a plurality of hydrophobic non-polar groups.
11. The reductant filter of claim 1 , wherein:
the at least one wall comprises a viewing portion disposed over the powder, the viewing portion being at least one of transparent or translucent; and
the indication is a change in color.
12. The reductant filter of claim 1 , wherein:
the at least one wall comprises a viewing portion disposed over the powder, the viewing portion being at least one of transparent or translucent; and
the powder or particulates is configured to provide the indication in response to the reductant having a concentration of the hydrocarbon of between 0.025% by weight and 1% by weight, inclusive.
13. The reductant filter of claim 1 , wherein:
the indication is a change in color; and
the powder or particulates is configured to provide the indication in response to the reductant having a concentration of the hydrocarbon of between 0.025% by weight and 1% by weight, inclusive.
14. The reductant filter of claim 1 , wherein:
the indication is a change in color; and
the filter element is configured to maintain the powder or particulates within the internal volume.
15. The reductant filter of claim 1 , wherein:
the at least one wall comprises a viewing portion disposed over the powder, the viewing portion being at least one of transparent or translucent; and
the filter element is configured to maintain the powder or particulates within the internal volume.
16. The reductant filter of claim 1 , wherein:
the filter element has a pore size of 10 microns, 5 microns, or 1 micron; and
the powder or particulates is configured to provide the indication in response to the reductant having a concentration of the hydrocarbon of between 0.025% by weight and 1% by weight, inclusive.
17. The reductant filter of claim 1 , wherein:
the indication is a change in color; and
the powder or particulates comprises at least one of: wax, a styrene maleic anhydride copolymer, siloxane, nylon, acrylonitrile butadiene styrene, polycarbonate, cellulose, or polymethyl methacrylate.
18. The reductant filter of claim 1 , wherein:
the filter element is configured to filter at least one of dust, an organic particle, a crystal, or a solid particulate, from the reductant; and
the powder or particulates comprises at least one of: wax, a styrene maleic anhydride copolymer, siloxane, nylon, acrylonitrile butadiene styrene, polycarbonate, cellulose, or polymethyl methacrylate.
19. The reductant filter of claim 1 , wherein:
the powder or particulates comprises at least one of: wax, a styrene maleic anhydride copolymer, siloxane, nylon, acrylonitrile butadiene styrene, polycarbonate, cellulose, or polymethyl methacrylate; and
the filter element is formed from at least one of: cotton or acrylonitrile butadiene styrene.