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VOCs (volatile organic chemcials) catalytic combustion integral catalyst and preparation method thereof

A monolithic catalyst, catalytic combustion technology, applied in catalyst activation/preparation, combustion method, physical/chemical process catalyst, etc. Sintering performance, improving surface acidity, inhibiting the effect of anti-SO2 poisoning

Active Publication Date: 2017-05-31
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The catalysts in the existing published patents all use a variety of noble metals as active components, including Pt-Pd, Pt-Rh-Pd, etc., but the anti-sulfur performance of catalysts with single Pd as the active component has not been involved, and due to existing The surface of the support material for loading active components has not been optimized, making the thermal stability of the catalyst unclear

Method used

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  • VOCs (volatile organic chemcials) catalytic combustion integral catalyst and preparation method thereof
  • VOCs (volatile organic chemcials) catalytic combustion integral catalyst and preparation method thereof
  • VOCs (volatile organic chemcials) catalytic combustion integral catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation steps of present embodiment catalyst are as follows:

[0029] 1) Cut a commercially available cordierite honeycomb carrier with a hole number of 200 holes / square inch into Φ20*40mm samples (mass about 10g), soak them in 200mL, 0.5% (wt%) dilute nitric acid solution for 20h, take them out, and use Wash it several times with deionized water until it becomes neutral, dry it in an oven at 110°C for 4 hours, and take it out for use.

[0030] 2) γ-Al 2 o 3 Preparation of the carrier: 100g of commercially available pseudo-boehmite (preferably Shandong Aluminum Industry Model A-AS-HC-PHP-08) is added to the ball mill jar, and the nitrates of Ce, Zr, La, Ba are than CeO 2 : ZrO 2 : La 2 o 3: BaO=0.3:0.7:0.2:0.1 is made into the aqueous solution of 38.25g 60% (wt%), and the consumption of soluble salt also adds in this ball mill jar according to total oxide 10g, then slowly adds 300ml 5% (wt%) %), sealed ball mill for 1 hour, took out the slurry and aged it...

Embodiment 2

[0036] In this example, a cordierite honeycomb carrier with the same specifications was prepared by the same method as in Example 1 for future use.

[0037] γ-Al 2 o 3 Preparation of carrier: the preparation method is the same as in Example 1, except that the nitrate of Ce, Zr, La, Ba is CeO in the molar ratio of oxide 2 : ZrO 2 : La 2 o 3 : BaO=0.5:0.5:0.2:0.1 is made into the aqueous solution of 36.12g 60% (wt%), and the consumption of soluble salt is calculated according to total oxide 10g, makes specific surface area 215m 2 / g γ-Al 2 o 3 carrier.

[0038] Catalyst powder preparation: the preparation method and the amount of active components are the same as in Example 1, and finally a stable catalyst active powder is obtained, wherein the mass ratio of Pd to the carrier material is 0.3%.

[0039] The preparation and coating method of the catalyst coating are the same as in Example 1, and the finally obtained catalyst is designated as Catalyst II (Cat. II).

[0040...

Embodiment 3

[0042] In this example, a cordierite honeycomb carrier with the same specifications was prepared by the same method as in Example 1 for future use.

[0043] The preparation method of the first carrier: γ-Al 2 o 3 Preparation of carrier: the preparation method is the same as in Example 1, except that the nitrate of Ce, Zr, La, Ba is CeO in the molar ratio of oxide 2 : ZrO 2 : La 2 o 3 : BaO=0.9:0.1:0.2:0.1 is made into the aqueous solution of 32.43g 60% (wt%), and the consumption of soluble salt is calculated according to total oxide 10g, makes specific surface area 225m 2 / g γ-Al 2 o 3 carrier.

[0044] The catalyst powder, coating and coating are the same as in Example 1, and the finally obtained catalyst is designated as Catalyst III (Cat. III).

[0045] The composition of catalyst III (Cat.III) in this example is: 84.4 parts of cordierite honeycomb ceramic carrier, γ-Al 2 o 3 13.6 parts, 1.5 parts of oxide additives, 0.04 parts of active ingredient Pd.

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Abstract

The invention provides a VOCs (volatile organic chemcials) catalytic combustion integral catalyst, and belongs to the technical field of catalysts. The VOCs catalytic combustion integral catalyst is prepared from the following raw materials in parts by mass: 82 to 87 parts of cordierite honeycomb ceramic carrier, 10 to 14 parts of gamma-Al2O3, 0.8 to 1.5 parts of oxide additive, and 0.01 to 0.05 part of active component Pd, wherein the gamma-Al2O3, the oxide additive and the active component Pd are used as coating layers. The invention also relates to a preparation method of the catalyst. The preparation method comprises the following steps of firstly, dispersing the Pd onto the special gamma-Al2O3 carrier, drying, and calcining, so as to obtain powder; adding an adhesive, a lubricant and water for preparing slurry, coating the cordierite honeycomb ceramic carrier with the slurry, drying and calcining, so as to obtain the catalyst. The catalyst has the characteristics that by using low-content noble metal Pd as the active component, the cost is low, the low-temperature ignition is quick, the anti-vulcanizing and anti-aging properties are realized, the catalyst is suitable for large air volume and high air speed, the dispersion property is good, the easiness in sintering is avoided, and the like; the catalyst is especially suitable for the catalyst combustion of sulfur-containing VOCs.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a VOCs catalytic combustion monolithic catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) catalytic combustion technology has been accepted by more and more enterprises and manufacturers as the main means of treating organic waste gas due to its advantages of mild reaction conditions, complete oxidation, no need to replace components, and recyclable reaction heat. Rubber industry vulcanization flue gas, oil refining, coking and coal-fired boiler tail gas contain more sulfides, which are mixed with a variety of carcinogenic hydrocarbons, aromatic hydrocarbons and polycyclic aromatic hydrocarbons PAHs compounds, the tail gas treatment is more general than the general organic waste gas treatment More complicated, the catalyst is prone to sulfur poisoning. For this type of organic waste gas, it is necessary to use a sulfur-res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/02F23G7/07
CPCB01J23/002B01J23/63B01J37/0201B01J37/0215B01J2523/00F23G7/07B01J2523/31B01J2523/3712B01J2523/48B01J2523/3706B01J2523/25
Inventor 王磊宋元江张新波李敬王大军
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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