Low-temperature catalyst and preparation method thereof

A catalyst, low temperature technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of short catalyst life, catalyst deactivation, low catalyst low temperature activity, etc.
CN103566964AInactive Publication Date: 2014-02-12无锡科立泰科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
无锡科立泰科技有限公司
Publication Date
2014-02-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a low-temperature catalyst. The low-temperature catalyst comprises one or more lanthanide series metal oxides and / or one or more transition metal oxides and / or one or more alkali or alkaline earth metal oxides, and also comprises copper and iron molecular sieve catalysts. The one or more lanthanide series metal oxides are selected from La, Ce, Zr and Nb oxides and have a use ratio of 1-50wt%. The one or more transition metal oxides are selected from Fe, Co, Ni, Cu, Mn, Zn, V, W, Mo and Ti oxides and have a use ratio of 1-50wt%. The one or more alkali or alkaline earth metal oxides are selected from Li, K, Cs, Ba, Sr and Ca oxides and have a use ratio of 1-30wt%. The copper and iron molecular sieve catalysts comprise aluminosilicate zeolite and / or aluminum phosphate molecular sieves. Through loading the one or more composite oxides on the copper and iron molecular sieve catalysts, the oxidizing agent for oxidizing NO into NO2 is obtained and reaction activity of whole SCR is improved.
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Description

technical field

[0001] The invention relates to a molecular sieve catalyst using composite oxide as ion exchange, especially a catalyst with high activity at low temperature and a preparation method thereof. Background technique

[0002] Nitrogen oxides (N y o x ) mainly includes N 2 O, NO, N 2 o 3 , NO 2 , N 2 o 4 , N 2 o 5 and other compounds are the main air pollutants, and the N emitted into the atmosphere around the world every year y o x The total amount reaches 50 million tons, and it is still growing. Therefore study governance N y o x It is one of the main contents in the field of global environmental protection.

[0003] N y o x There are two ways of production: one is natural production, and the other is artificial production. Naturally produced sources include lightning, ammonia oxidation in the atmosphere, and nitrification by microorganisms in the soil, etc. N y o x Due to the natural selection to achieve ecological balance, there is no great...

Claims

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