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A kind of preparation method of cu-ce-sapo-34 spherical aggregate denitration catalyst

A technology of cu-ce-sapo-34 and spherical aggregates, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low loading of active components, poor dispersion, and limited pore diffusion Hydrocarbon poisoning and other problems, to achieve the effect of high active component content and dispersion, good high temperature stability, and low low temperature diffusion resistance

Active Publication Date: 2022-02-11
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of NH used in existing diesel vehicles 3 -The pore diffusion limit brought by the small pore structure of the SCR catalyst, which is easy to cause carbon deposition and hydrocarbon poisoning, the loading capacity of the active component is low and the dispersibility is poor. The invention provides a multi-level pore structure, active The preparation method of Cu-Ce-SAPO-34 spherical aggregate denitration catalyst with high component loading, uniform dispersion and good catalytic activity adopts the following technical scheme:

Method used

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  • A kind of preparation method of cu-ce-sapo-34 spherical aggregate denitration catalyst
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  • A kind of preparation method of cu-ce-sapo-34 spherical aggregate denitration catalyst

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Embodiment 1

[0025] The invention provides a preparation method of a Cu-Ce-SAPO-34 spherical aggregate denitration catalyst, which is carried out according to the following steps:

[0026] Step 1: Use the impregnation method to load the active components Cu and Ce on the template agent cellulose, the specific method is as follows: add 0.7816g Ce (NO 3 ) 3 ·6H 2 O and 1.098g of Cu(NO 3 ) 2 ·3H 2 O, 0.85mL tetraethylenepentamine (TEPA), 50.0mL H 2 O and 1.62g of cellulose powder were heated and stirred in a water bath until the water was evaporated to dryness, and the solid matter was dried and ground to 1000 mesh for subsequent use, marked as A.

[0027] Step 2: selecting aluminum isopropoxide, phosphoric acid, tetraethylorthosilicate (TEOS), and diethylamine (DEA) as the aluminum source, phosphorus source, silicon source, and template to obtain sol B. The specific operation is as follows: First, dissolve 6.1272g of aluminum isopropoxide in 18.9mL of deionized water, then add 3.14mL o...

Embodiment 2

[0030] The invention provides a preparation method of a Cu-Ce-SAPO-34 spherical aggregate denitration catalyst, which is carried out according to the following steps:

[0031] Step 1: Use the impregnation method to load the active components Cu and Ce on the template agent cellulose, the specific method is as follows: add 0.7816g Ce (NO 3 ) 3 ·6H 2 O and 0.2197g of Cu(NO 3 ) 2 ·3H 2 O, 0.17mL tetraethylenepentamine (TEPA), 50.0mL H 2 O and 0.405g of cellulose powder were heated and stirred in a water bath until the water was evaporated to dryness, and the solid matter was dried and ground to 1000 mesh for later use, marked as A.

[0032] Step 2: selecting aluminum isopropoxide, phosphoric acid, tetraethyl orthosilicate (TEOS), and diethylamine (DEA) as the aluminum source, phosphorus source, silicon source, and template to obtain sol B. The specific operation is as follows: First, dissolve 6.1272g of aluminum isopropoxide in 18.9mL of deionized water, then add 3.14mL of ...

Embodiment 3

[0035] The invention provides a preparation method of a Cu-Ce-SAPO-34 spherical aggregate denitration catalyst, which is carried out according to the following steps:

[0036] Step 1: Use the impregnation method to load the active components Cu and Ce on the template agent cellulose, the specific method is as follows: add 0.7816g Ce (NO 3 ) 3 ·6H 2 O and 0.4393g of Cu(NO 3 ) 2 ·3H 2 O, 0.34mL tetraethylenepentamine (TEPA), 50.0mL H 2 O and 0.81g of cellulose powder were heated and stirred in a water bath until the water was evaporated to dryness, and the solid matter was dried and ground to 1000 mesh for later use, marked as A.

[0037] Step 2: selecting aluminum isopropoxide, phosphoric acid, tetraethyl orthosilicate (TEOS), and diethylamine (DEA) as the aluminum source, phosphorus source, silicon source, and template to obtain sol B. The specific operation is as follows: First, dissolve 6.1272g of aluminum isopropoxide in 18.9mL of deionized water, then add 3.14mL of d...

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Abstract

The invention discloses a preparation method of a Cu-Ce-SAPO-34 spherical aggregate denitration catalyst, belonging to the technical field of molecular sieve synthesis. The method is to use the impregnation method to load the active components Cu and Ce on the template agent cellulose, which is recorded as powder A; aluminum isopropoxide, phosphoric acid, tetraethyl orthosilicate and diethylamine are prepared into a sol, Denoted as sol B; powder A was added to sol B and stirred, and then the mixture was obtained by ultrasonication, and then the mixture was crystallized, suction filtered, washed, dried and roasted in sequence to obtain Cu-Ce-SAPO-34 spherical aggregate molecular sieve. The Cu-Ce-SAPO-34 spherical aggregate molecular sieve prepared by the preparation method of the present invention has better catalytic action and the out-of-stock catalyst is spherical, and has both mesopore and micropore structures, and has strong adsorption to reactants and high temperature stability. It has the advantages of good performance and low low-temperature diffusion resistance.

Description

technical field [0001] The present invention relates to a preparation method of Cu-Ce-SAPO-34 spherical aggregate denitrification catalyst, in particular to an improved type that reduces the diffusion resistance of diesel vehicle exhaust denitrification molecular sieves and increases the loading and dispersion of Cu and Ce active components. The preparation method belongs to the technical field of molecular sieve synthesis. Background technique [0002] The purification of NOx from mobile sources such as diesel vehicle exhaust is a research hotspot in the field of air pollution control, among which selective catalytic reduction of ammonia (NH 3 -SCR) is one of the most promising technologies for controlling diesel engine exhaust emissions. The core issue of this technology is the catalyst. At present, the traditional vanadium-based catalyst V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 There are still many problems in the application of diesel vehicle exhaust purification, such as bio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85B01J35/08F01N3/28
CPCB01J29/85F01N3/28B01J2229/18F01N2570/14B01J35/51
Inventor 马媛媛李智芳韩福忠郑禾山滕艳龙
Owner QIQIHAR UNIVERSITY