High-property absorption and wave absorption type catalyst for VOCs (Volatile Organic Chemicals) catalytic oxidation and preparation of catalyst

A catalytic oxidation and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of enhancing the hydrophobicity and chemical adsorption capacity of catalysts, not utilizing carbon heating capacity, and carbon nano-dot limitations. , to achieve the effects of enhanced microwave absorption performance, increased saturated adsorption capacity, and prolonged residence time

Inactive Publication Date: 2014-04-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In this technology, carbon nano-dots are only used to enhance the photocatalytic effect, which is relatively limited, and have not been applied to the traditional heating and catalytic oxidation field; the microwave absorbing ability of carbon is not used to raise the temperature; carbon nano-dots are not used to enhance the hydrophobicity of the catalyst after loading and chemical adsorption capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A high-performance adsorption and wave-absorbing catalyst for the catalytic oxidation of VOCs, with a structural formula of Cu-Mn-Ce / TiO 2 -Molecular sieves, where Cu and Mn are the catalytically active components, Ce is the promoter metal, TiO 2 - Molecular sieve is used as carrier, and each component is based on Cu:Mn:Ce:TiO 2 - Molecular sieve = weight ratio of 5:5:1:110 supported on TiO 2 - Molecular sieve composite carrier.

[0039] The preparation method of this catalyst comprises the steps:

[0040] Step 1: Mix 15ml of absolute ethanol with 1ml of deionized water and 2ml of acetylacetone to form a dropwise solution, drop into the mixture of 15ml of absolute ethanol and 20ml of butyl titanate at a constant speed, stir magnetically for 3 hours, and obtain uniform and transparent TiO 2 Sol.

[0041] Step 2, TiO 2 The sol and the molecular sieve particles were mixed evenly at a mass ratio of 1:15, dried in an oven at 105°C for 2h, then roasted in a muffle furnac...

Embodiment 2

[0044] Another form of a high-performance adsorption and wave-absorbing catalyst for catalytic oxidation of VOCs, with a structural formula of CNDs-Cu-Mn-Ce / TiO 2 - Molecular sieves, where CNDs are modifiers, Cu and Mn are catalytically active components, Ce is a promoter metal, TiO 2 - Molecular sieve is used as the carrier, each component is based on CNDs:Cu:Mn:Ce:TiO 2 - Molecular sieve = weight ratio of 1.5:5:2:1:110 supported on TiO 2 - Molecular sieve composite carrier.

[0045] The preparation method of this catalyst comprises the steps:

[0046] Step 1, prepare TiO 2 Sol;

[0047] Step 2, TiO 2 The sol and the molecular sieve particles were mixed evenly at a mass ratio of 1:15, dried in an oven at 105°C for 2h, then roasted in a muffle furnace at 500°C for 2.5h, and obtained TiO after cooling. 2 -Molecular sieve composite carrier;

[0048] Step 3, the gained TiO 2 - Molecular sieve composite carrier 110g is immersed in Cu(NO3 ) 2 , Mn(NO 3 ) 2 and CeNO 3 In...

Embodiment 3

[0051] A high-performance adsorption and wave-absorbing catalyst for the catalytic oxidation of VOCs, with a structural formula of Cu-Mn-Ce / TiO 2 -Molecular sieves, where Cu and Mn are the catalytically active components, Ce is the promoter metal, TiO 2 - Molecular sieve is used as carrier, and each component is based on Cu:Mn:Ce:TiO 2 - Molecular sieve = weight ratio of 2:2:1:90 supported on TiO 2 - Molecular sieve composite carrier.

[0052] The preparation method of this catalyst comprises the steps:

[0053] Step 1: Mix 20ml of absolute ethanol with 1.5mL of deionized water and 2.5ml of acetylacetone to form a dropwise solution, drop them into the mixture of 20ml of absolute ethanol and 25ml of butyl titanate at a constant speed, and stir magnetically for 3-4 hours to obtain Uniform, transparent TiO 2 Sol.

[0054] Step 2, TiO 2 The sol and the molecular sieve particles were mixed evenly at a mass ratio of 1:10, dried in an oven at 105°C for 2h, then roasted in a muf...

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PUM

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Abstract

The invention provides a high-property absorption and wave absorption type catalyst for VOCs (Volatile Organic Chemicals) catalytic oxidation. The high-property absorption and wave absorption type catalyst has a structural formula: a Cu-Mn-Ce / TiO2-molecular sieve or a CNDs-Cu-Mn-Ce / TiO2-molecular sieve, wherein CNDs serve as a modifier; Cu and Mn serve as catalytic activity components; Ce serves as a promoted catalytic metal; a TiO2-molecular sieve serves as a carrier. The invention further provides a preparation method of the catalyst. According to the catalyst and the preparation method of the catalyst provided by the invention, the treatment cost is greatly reduced and energy is utilized at maximum through the advantages of the combination of a plurality of materials, so that the relatively good VOCs catalytic oxidation effect can be realized under the microwave irradiation.

Description

technical field [0001] The present invention relates to a kind of TiO 2 - Molecular sieve catalysts and their preparation. Background technique [0002] For the treatment of gaseous volatile organic compounds, catalytic oxidation is widely used due to its advantages of energy saving, high efficiency and thorough oxidation. Among them, the preparation and use of catalysts become the key to this technology, and Andreeva D in Bulgaria adopted TiO 2 , CeO 2 and Al 2 o 3 As a carrier, support noble metal Au and transition metal Mo and V oxides to catalyze the oxidation of benzene; German and so on zeolite as a carrier to load Pd and Cu to finally completely oxidize benzene. In addition, scholars from South Korea, Brazil, Spain, France, Portugal and other countries have also conducted in-depth research on the preparation and application of catalysts for treating volatile organic compounds. Domestic scholars who carried out this research include Chen Min, Zheng Xiaoming and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/076B01D53/86B01D53/44
CPCY02A50/20
Inventor 卜龙利孙剑宇杨力刘海楠张钰彩廖建波
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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