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Catalyst and manufacturing method of catalyst

A catalyst and zeolite technology, applied in the direction of catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of storage, transportation and use, and achieve excellent high temperature stability and effective removal

Inactive Publication Date: 2018-05-01
HYUNDAI MOTOR CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in mobile applications, such as in vehicles, there are problems with storing, transporting and using ammonia

Method used

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  • Catalyst and manufacturing method of catalyst
  • Catalyst and manufacturing method of catalyst
  • Catalyst and manufacturing method of catalyst

Examples

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preparation example Construction

[0026] A method of preparing a catalyst according to an exemplary embodiment includes preparing an LTA zeolite having a weight ratio of silicon to aluminum greater than 1, preparing an ion-containing LTA zeolite that displaces ions in the LTA zeolite, and preparing by performing copper ion exchange on the ion-containing LTA zeolite. Copper-type LTA zeolite. The resulting copper-form LTA zeolite has a copper to aluminum weight ratio of about 0.14 to about 0.58.

[0027] LTA zeolites can be prepared with or without seeds. The prepared LTA zeolite has a silicon to aluminum weight ratio exceeding 1. In another example embodiment, the weight ratio of silicon to aluminum may be about 5 to about 50. Preferably, the weight ratio of silicon to aluminum may be about 5 to about 30. More preferably, the weight ratio of silicon to aluminum may be greater than or equal to 8.

[0028] The preparation of an exemplary LTA zeolite using crystal grains is described below.

[0029] To prepar...

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Abstract

A catalyst according to an example embodiment includes an LTA zeolite having copper ions, wherein the weight ratio of copper to aluminum is from about 0.14 to about 0.58, and the weight ratio of silicon to aluminum of the LTA zeolite exceeds 1.

Description

[0001] Cross-references to related fields [0002] This application claims priority and benefit from Korean Patent Application No. 10-2016-0137785 filed with the Korean Intellectual Property Office on October 21, 2016, the entire contents of which are incorporated herein by reference. technical field [0003] The present disclosure relates to a catalyst and a preparation method thereof. Background technique [0004] Typically, the exhaust of diesel vehicles contains harmful substances such as carbon monoxide, hydrocarbons, and nitrogen oxides ("NOx"). Nitrogen oxides cause environmental problems such as photochemical smog and acid rain, as well as human disease. Therefore, there is a need to improve engines and develop effective exhaust gas treatment technologies. [0005] The most efficient conventional technique for removing nitrogen oxides uses a selective catalytic reduction ("SCR") process. This method utilizes such as ammonia (NH 3 ), urea, hydrocarbons ("HC") and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01D53/56B01D53/94
CPCB01D53/9413B01J29/7607B01D2258/01B01J2229/186B01J37/0246C01B39/145B01J2229/36C01B39/46B01J29/72B01J37/0018B01J2229/20B01J2229/40
Inventor 金平淳金昌焕柳泰炅赵栋熙朴起泰金孝俊南寅植洪锡凤
Owner HYUNDAI MOTOR CO LTD