Catalytic combustion active ingredient highly-dispersed catalyst and preparation method thereof

A technology of active components and catalytic combustion, which is applied in the direction of catalyst activation/preparation, combustion methods, physical/chemical process catalysts, etc. It can solve problems such as uneven dispersion, reduced dispersion, and increased particle size of noble metals to achieve high catalytic performance. The effect of high activity, simple preparation process and low energy consumption

Active Publication Date: 2016-05-04
芜湖启博知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional impregnation process can disperse the noble metal precursor solution on the carrier, the dispersion is often uneven; the high-temperature calcination and high-temperature reduction process will also lead to the agglomeration of active components, resulting in an increase in the particle size of the noble metal and a decrease in the dispersion.

Method used

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  • Catalytic combustion active ingredient highly-dispersed catalyst and preparation method thereof
  • Catalytic combustion active ingredient highly-dispersed catalyst and preparation method thereof
  • Catalytic combustion active ingredient highly-dispersed catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Take 0.5mL of chloropalladium acid (or chloroauric acid or chloroplatinic acid) with a concentration of 0.1g / mL (the mass of Pd, Pt, and Au per milliliter), add deionized water to form a 10mL mixed solution;

[0027] (2) Add 0.2g octanoic acid in the above mixed solution, stir well;

[0028] (3) Add the above mixed solution to 5g SiO 2 Medium, equal volume immersion aging for 12 hours;

[0029] (4) After the above product is dried, low-temperature plasma treatment is carried out, and the plasma discharge mode is dielectric barrier discharge. first at 1000h -1 Low-temperature plasma treatment for 0.5 hours under the air atmosphere of space velocity, and then in 1000h -1 Low-temperature plasma treatment for 0.5 hours under a space velocity hydrogen atmosphere to obtain the product active component highly dispersed catalyst 1wt% Pd / SiO 2 (1wt%Au / SiO 2 , 1wt%Pt / SiO 2 ).

[0030] (5) Evaluate the catalytic combustion performance in a fixed bed reactor, the amount ...

Embodiment 2

[0035] (1) Take 0.5 mL of chloropalladic acid with a concentration of 0.1 g / mL (the mass of Pd per mL) and 0.63 g of cerium nitrate, add deionized water to form a 10 mL mixed solution;

[0036] (2) Add a certain amount of oily dispersant to the above mixed solution and stir evenly;

[0037] (3) Add the above mixed solution to 5g SiO 2 Medium, equal volume immersion aging for 6 hours;

[0038] (4) After the above product is dried, low-temperature plasma treatment is carried out, and the plasma discharge mode is dielectric barrier discharge. first at 1000h -1 Low-temperature plasma treatment for 2 hours under the air atmosphere of space velocity, and then in 1000h -1 Low-temperature plasma treatment under space velocity hydrogen atmosphere for 2 hours, the product active component highly dispersed catalyst 1wt%Pd-5wt%CeO 2 / SiO 2 .

[0039](5) Evaluate the catalytic combustion performance in a fixed bed reactor, the amount of catalyst is 0.1g, the concentration of VOCs sim...

Embodiment 3

[0044] (1) Take 0.5 mL of chloropalladic acid with a concentration of 0.1 g / mL (the mass of Pd per mL) and 0.63 g of cerium nitrate, add deionized water to form a 10 mL mixed solution;

[0045] (2) Add 0.2g lauric acid in the above mixed solution, stir evenly;

[0046] (3) Add the above mixed solution to 5g SiO 2 Medium, equal volume immersion aging for more than 6 hours;

[0047] (4) After the above product is dried, low-temperature plasma treatment is carried out, and the plasma discharge mode is dielectric barrier discharge. Firstly, low-temperature plasma treatment for 5 hours in an air atmosphere with a certain space velocity, and then a low-temperature plasma treatment for 5 hours in a hydrogen atmosphere with a certain space velocity, to obtain the product active component highly dispersed catalyst 1wt%Pd-5wt%CeO 2 / SiO 2 .

[0048] (5) Evaluate the catalytic combustion performance in a fixed bed reactor, the amount of catalyst is 0.1g, the concentration of VOCs sim...

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Abstract

The present invention discloses a catalytic combustion active ingredient highly-dispersed catalyst and a preparation method thereof. The catalyst M-CeO2 / SiO2 comprises noble metal M, aid CeO2, and carrier SiO2. The catalyst M-CeO2 / SiO2 is prepared as follows: an oily dispersing agent is added into a mixed solution containing a concentration of a noble metal precursor and cerium nitrate, then the carrier SiO2 is added, and equivalent-volume impregnation and aging is performed for more than 6 hours; and after high-temperature treatment by heating or low temperature plasma treatment in an air atmosphere under a certain airspeed for 0.5 to 5 hours, the mixture is placed in hydrogen atmosphere under a certain airspeed for high-temperature treatment by heating or low temperature plasma treatment for 0.5 to 5 hours. The preparation process is simple, the catalyst M-CeO2 / SiO2 is prepared by adding of the oily dispersing agent and low temperature plasma treatment, and the catalyst M-CeO2 / SiO2 has high catalytic activity of catalytic combustion reaction of volatile organic compounds at low temperature. The whole process is low in energy consumption, and the removal rate of volatile organic compounds at low temperature can reach more than 95%.

Description

technical field [0001] The invention relates to the purification treatment of volatile organic compounds, in particular to a highly dispersed active component catalyst for catalytic combustion and a preparation method thereof. Background technique [0002] With the continuous rapid development of our society and economy, environmental problems are becoming more and more serious, so environmental pollution and its control technology have also attracted much attention. Volatile organic compounds (Volatile Organic compounds, referred to as VOCs) is an important air pollution gas, which mainly comes from the waste gas emitted by industries such as coatings, flavors and fragrances, pharmaceuticals, petrochemicals, printing or painting. VOCs not only cause carcinogenic, teratogenic and mutagenic hazards to organisms, but are also one of the important factors in the formation of photochemical pollution, seriously endangering human body functions and destroying the health of the ear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/52B01J23/63B01J23/66B01J37/00F23G7/07
CPCB01J23/002B01J23/42B01J23/44B01J23/52B01J23/63B01J23/66B01J37/349F23G7/07
Inventor 王卉吴圣姬杨圩田鹏辉周洁
Owner 芜湖启博知识产权运营有限公司
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