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US 10,092,896 B2Granted
Catalyst for selective catalytic reduction and preparation method therefor
AssigneesDoosan Engine Co., Ltd., Korea Institute of Science and Technology
InventorsJin Ho Cheon, Kyung Ju Lee, Sang Jin Kim, Heon Pil Ha
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Abstract
A catalyst for selective catalytic reduction is described. Cerium (III) sulfate (cerous sulfate) is bound to a support. The catalyst also includes vanadium oxide and cerium oxide.
Claims2
A method for preparing a catalyst, the method consisting of:
- a) preparing a raw material catalyst, the raw material catalyst consisting essentially of a support material, vanadium oxide, antimony oxide, and cerium oxide, wherein the cerium oxide is cerium (IV) oxide, or a mixture of cerium (III) oxide and cerium (IV) oxide;
- b) heating the raw material catalyst to a temperature of 350 to 600° C. under air atmosphere;
- and
- c) treating the heated raw material catalyst with sulfur dioxide (SO2) to form cerium (III) sulfate on the surface of the support by reacting the cerium (IV) oxide of the heated raw material catalyst with the sulfur dioxide (SO2) and O2.
1 more element
Dependencies are inferred from the claim text.