High-performance zeolite for reducing nitrogen oxide emissions, method of preparing same and catalyst using same
AssigneesHyundai Motor Company, Kia Corporation, Heesung Catalysts Corporation
InventorsPyung Soon Kim, Young Jin Kim, Chang Hwan Kim, Seung Chul Na, Seung Ho Oh, Young San Yoo, Ho Dong Kim
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Abstract
Disclosed is a method of preparing a high-performance zeolite catalyst for reducing nitrogen oxide emissions, and more particularly a technique for preparing a zeolite catalyst, suitable for use in effectively removing nitrogen oxide (NOx), among exhaust gases emitted from vehicle internal combustion engines through selective catalytic reduction (SCR), thereby exhibiting high efficiency, high chemical stability and high thermal durability upon SCR using the prepared catalyst.
Claims13
A method of preparing a copper-impregnated LTA zeolite catalyst, the method comprising:
- producing an LTA zeolite, wherein the producing of the LTA zeolite is performed using a fluorine-substituted structure-directing agent (SDA-F) that is subjected to mixing with a silicon material, an aluminum material, and a template, and then to a hydrothermal synthesis that is performed through a two-stage temperature-elevating synthesis process, and
- impregnating copper in the LTA zeolite,
- wherein the two-stage temperature-elevating synthesis process is performed at 100° C. to 120° C. for 5 to 10 hours, and then the temperature is raised to 150° C. to 200° C. for 10 to 15 hours.
Dependencies are inferred from the claim text.