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US 11,338,272 B2Granted
Catalyst capable of directly decomposing urea and method for urea decomposition using the same
AssigneeDaeyoung C&E
InventorsSei Youn Noh, Nam Ha Kim, Byung Han Seo, Hyo Sang Lee, Myoung Jin Kha, Jong Min Won, Gyeong Ryun Choi
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Abstract
The present disclosure relates to a catalyst for directly decomposing urea, a method for preparing the same and a system for decomposing urea including the same, whereby the efficiency of decomposing urea to ammonia may be improved while preventing the formation of a byproduct such as biuret at temperatures of 200° C. or below by controlling the oxygen composition of the catalyst including titania and ceria.
Claims16
A method for decomposing urea using a catalyst, comprising:
- injecting urea into a reactor equipped with the catalyst at a temperature of 180-200° C.;
- and
- conducting a first reaction of decomposing urea to ammonia in the reactor,
- wherein the catalyst for decomposing urea comprising:
- a titania support;
- and
- ceria supported on the titania,
- wherein the catalyst has been sintered, and has an oxygen composition satisfying Equation 1,
- 0.8≤Oα+Oβ/Ototal≤0.87 [Equation 1]
- where Oα represents lattice oxygen, Oβ represents surface oxygen and Ototal represents total oxygen in the catalyst.
7 more elements
Dependencies are inferred from the claim text.