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Catalytic combustion catalyst and preparation method thereof

A catalytic combustion and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, short life, poor wear resistance, etc., achieve high removal rate, improve Effect of service life, high coating increase

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that the coating is an important part of the catalyst. Due to the problems of the amount of coating and the bonding strength of the above catalyst, there are disadvantages of poor stability, short life and poor wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Soak the honeycomb ceramic carrier with a porosity of 70% in dilute hydrochloric acid with a mass concentration of 1% for 2 hours, wash the carrier and the dilute acid liquid under microwave for 2 hours, take it out and dry it, and place it in an oven at 100°C 6 hours, the obtained carrier was roasted for 5 hours to obtain a clean and dry honeycomb ceramic carrier for subsequent use;

[0024] A carboxymethyl cellulose solution with a mass concentration of 3% was prepared by a step-by-step method, and the dissolution temperature was 40 °C. Take 10g of pseudo-boehmite (Shandong Aluminum Industry) and add it to 100mL of the above-mentioned carboxymethyl cellulose solution, and add 6g of concentrated nitric acid while stirring at 300 rpm. Heat the solution to 80°C, continue to drop nitric acid until it is completely peptized, control the pH value to 1-5, and age for 24 hours to obtain milky white aluminum sol;

[0025] Weigh 46g of pseudoboehmite, 10g of cerium oxide, 8g o...

Embodiment 2

[0029] Carrier pretreatment process is the same as embodiment 1, difference is that nitric acid concentration is 0.5%, soaking time is 2 hours;

[0030] The preparation method of aluminum sol is the same as in Example 1, except that the pseudo-boehmite is 12.5 g, and 7.2 g of concentrated nitric acid is slowly added while stirring at a speed of 350 rpm;

[0031] Weigh 22g of pseudoboehmite, 7.5g of cerium nitrate, 8.2g of zirconium nitrate, 26.6g of lanthanum nitrate, nano-TiO 2 Dissolve 0.8g, 0.8g of copper nitrate, 1.2g of manganese nitrate and 3g of aluminum nitrate in 100g of deionized water, stir slightly with a glass rod, and then move it into a ball mill jar. After ball milling for 4 hours, pour the obtained slurry into a beaker while stirring While adding concentrated nitric acid 0.6ml, the stirring speed is 800 rpm, the stirring time is 6 hours, after standing for 2 hours, add 4g urea and stir vigorously for 40min, the stirring speed is 800 rpm, the temperature is 30°...

Embodiment 3

[0035] The carrier pretreatment process is the same as in Example 1, except that the soaking time is 6 hours, the drying time is 4 hours, and the drying temperature is 60°C;

[0036] Aluminum sol preparation method is the same as embodiment 1, difference is that carboxymethyl cellulose solution concentration is 6%, and stirring speed is 450 rpm;

[0037] The disposition process of coating slurry is the same as embodiment 1;

[0038] The coating process of aluminum sol and slurry is the same as embodiment 1;

[0039] Using distilled water as solvent, add Pt(NO 3 ) 4 Powder, Zr(NO 3 ) 4 Powder, La(NO 3 ) 3 .6H 2 O crystalline particles, prepare a composite active component nitrate solution with a metal element mass percentage of 0.8%, put the coated carrier into the solution and soak it for 30 minutes, take it out, and place it in an oven at 70°C 6 hours, and then calcined for 5 hours to make a catalytic combustion catalyst, wherein the loading amount of Pt is 0.8g per l...

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PUM

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Abstract

The invention discloses a catalytic combustion catalyst and a preparation method thereof. The catalyst uses honeycomb ceramic as a supporter, and an aluminasol coating and a slurry coating are sequentially arranged on the surface of the honeycomb ceramic supporter; the aluminasol coating is positioned between the ceramic supporter and the slurry coating; Pt, Zr and La metal element active components are supported on the surface of the slurry coating; the Pt / Zr / La mol ratio is (0.1-1):(1.5-4.5):(1.5-4); and every liter of catalyst supports 0.2-3.5g of noble metal Pt active component. The preparation method of the catalytic combustion catalyst comprises the following steps: supporter pretreatment, aluminasol preparation, coating slurry preparation, sol application of supporter, slurry application, and metal active component supporting. The catalytic combustion catalyst has the advantages of long service time, high removal rate and the like in the catalytic combustion process of treating organic waste gas, thereby ensuring the long-term stable operation of the catalytic combustion device.

Description

technical field [0001] The invention relates to a catalytic combustion catalyst and a preparation method thereof, in particular to a catalytic combustion catalyst with high service life and stability and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are produced in the petroleum refining industry and the electronics, printing, coating, and paint processing industries. A large amount of organic waste gas not only pollutes the environment, but also seriously endangers human health. With the improvement of people's living standards, the requirements for the living environment are getting higher and higher, and the effective treatment of this type of gas has attracted widespread attention. Among the technologies for treating VOCs, the catalytic combustion method has the characteristics of high efficiency and low temperature, and has been more and more widely used. In order to ensure the circulation of exhaust gas and reduce the l...

Claims

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Application Information

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IPC IPC(8): B01J37/025B01J23/89B01D53/86B01D53/72
Inventor 刘新友程明珠陈玉香王学海
Owner CHINA PETROLEUM & CHEM CORP
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