ZEOLITE HAVING SPECIFIC RATIO OF DIVALENT COPPER IONS SUPPORTED THEREON, AND PREPARATION METHOD THEREFOR AND CATALYST COMPOSITION COMPRISING SAME
First Claim
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1. A zeolite loaded with copper ions in which a Cu2+ (α
- )/Cu2+ (β
) ratio after exposure to NO for 180 sec in a NO DRIFTS spectrum is 80% or more.
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Abstract
The present invention relates to zeolite containing Cu2+ (α) and Cu2+ (β) having different NO adsorption capacities loaded at a specific ratio, wherein the zeolite is chabazite (CHA)-type zeolite, particularly chabazite (CHA)-type zeolite loaded with divalent copper ions in which the NO adsorption area ratio of Cu2+ (α)/Cu2+ (β) after exposure to NO (nitrogen oxide) for 180 sec is 80% or more. In addition, the present invention relates to a method of preparing zeolite that is ion-exchanged in a slurry state and to a catalyst including the specified chabazite (CHA)-type zeolite.
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Citations
12 Claims
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1. A zeolite loaded with copper ions in which a Cu2+ (α
- )/Cu2+ (β
) ratio after exposure to NO for 180 sec in a NO DRIFTS spectrum is 80% or more. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- )/Cu2+ (β
- 11. A method of preparing a Fe-ion-exchanged zeolite, the method comprising preparing a zeolite slurry by dispersing an iron precursor and H-zeolite in a slurry state and drying and calcining the zeolite slurry.
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