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US 8,007,735 B2Granted
Selective catalytic oxidation of ammonia to water and nitrogen
AssigneeHamilton Sundstrand Space Systems International, Inc.
InventorsTimothy A. Nalette, Catherine Thibaud-Erkey
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Abstract
A catalyst includes a platinum coating deposited on a silica support. The support has an average surface area between about 100 m2/g and about 120 m2/g. The platinum coating is between about 5 wt % and about 15 wt % of the catalyst. The combination of the selected surface area, silica support, and selected amount of platinum coating provides a catalytic activation temperature below 200° C. and avoids the formation of NOx.
Claims9
A catalytic system comprising:
- a vaporizer for receiving liquid water having ammonia and at least partially vaporizing the liquid water and ammonia;
- and
- a catalyst for receiving gaseous ammonia from said vaporizer and for oxidizing said gaseous ammonia, said catalyst in fluid communication with said vaporizer, said catalyst including a platinum catalyst coating that is between about 5% and about 15% of a mass of said catalyst.
Dependencies are inferred from the claim text.