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Preparation method of catalyst capable of catalytically combusting VOCs (volatile organic compounds) containing fluorine and chlorine

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 problems such as unsatisfactory catalytic effect, catalyst poisoning and deactivation, loss of active components, etc., and achieve good results Anti-virus ability, repeated use stability, low cost effect

Inactive Publication Date: 2016-11-23
JIANGSU ANQIER WASTE GAS PURIFICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when halogen-containing VOCs are catalyzed and oxidized, such as chlorine-containing organic compounds, the breakage of the C-Cl bond replaces the breakage of the C-H bond, and the generated Cl species will be strongly adsorbed on the surface of the noble metal catalyst or combined with the active component to form a volatile metal chloride. , leading to the loss of active components, catalyst poisoning and deactivation, and the generated Cl 2 And react with other organic matter to generate polychlorinated organic matter, causing secondary pollution
When the active component is a transition metal oxide, the anti-halide performance is good, but the catalytic effect is not ideal

Method used

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  • Preparation method of catalyst capable of catalytically combusting VOCs (volatile organic compounds) containing fluorine and chlorine
  • Preparation method of catalyst capable of catalytically combusting VOCs (volatile organic compounds) containing fluorine and chlorine
  • Preparation method of catalyst capable of catalytically combusting VOCs (volatile organic compounds) containing fluorine and chlorine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) 0.1981g La(NO 3 ) 3 ·6H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of the lanthanum-containing compound.

[0023] (2) Take 1g CeO 2 The powder was mixed with the solution obtained in (1), stirred by a magnetic stirrer at room temperature for 1 hour, impregnated for 8 hours, evaporated at 50°C, dried at 100°C for 8 hours, calcined at 350°C for 8 hours, and ground to obtain La(5.00wt.%)-CeO 2 Powder, wherein the mass fraction of La is 5.00%.

[0024] (3) 1.2206g Co(CH 3 COO) 2 4H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of cobalt-containing compounds.

[0025] (4) Mix 1 g of the powder obtained in (2) with the solution obtained in (3), stir for 4 hours at room temperature with a magnetic stirrer, impregnate for 16 hours, evaporate at 50°C, dry at 100°C for 8 hours, roast at 350°C for 6 hours, and grind to obtain Co( 20...

Embodiment 2

[0029] (1) Add 0.3000g La(CH 3 COO) 3 4H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of the lanthanum-containing compound.

[0030] (2) Take 1g CeO 2 The powder was mixed with the solution obtained in (1), stirred by a magnetic stirrer at room temperature for 2 hours, impregnated for 10 hours, evaporated at 60°C, dried at 110°C for 7 hours, calcined at 450°C for 7 hours, and ground to obtain La(8.08wt.%)-CeO 2 Powder, wherein the mass fraction of La is 8.08%.

[0031] (3) 1.0000g Co(CH 3 COO) 2 4H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of cobalt-containing compounds.

[0032] (4) Mix 1 g of the powder obtained in (2) with the solution obtained in (3), stir for 3 hours at room temperature with a magnetic stirrer, impregnate for 14 hours, evaporate at 60°C, dry at 110°C for 7 hours, roast at 450°C for 6 hours, and grind to obtain...

Embodiment 3

[0036] (1) Add 0.4000g La(NO 3 ) 3 ·6H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of the lanthanum-containing compound.

[0037] (2) Take 1g CeO 2 The powder was mixed with the solution obtained in (1), stirred by a magnetic stirrer at room temperature for 2 hours, impregnated for 12 hours, evaporated at 70°C, dried at 120°C for 6 hours, calcined at 500°C for 6 hours, and ground to obtain La(9.45wt.%)-CeO 2 Powder, wherein the mass fraction of La is 9.45%.

[0038] (3) 1.0000g Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL of distilled water and stirred until completely dissolved to form an aqueous solution of cobalt-containing compounds.

[0039] (4) Mix 1 g of the powder obtained in (2) with the solution obtained in (3), stir for 2 hours at room temperature with a magnetic stirrer, impregnate for 12 hours, evaporate at 70°C, dry at 120°C for 6 hours, roast at 500°C for 5 hours, and grind to obtain Co(...

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Abstract

The invention relates to the preparation techniques of catalysts and is intended to provide a preparation method of a catalyst capable of combusting VOCs ((volatile organic compounds) containing fluorine and chlorine. The method includes: preparing La-CeO2 powder from CeO2 and lanthanum-containing compounds by impregnation, and preparing Co / La-CeO2 powdery catalyst with cobalt-containing compounds by impregnation; mixing and stirring with polyvinyl chloride and colloidal alumina into a slurry, soaking a singular honeycomb ceramic carrier in the slurry, impregnating and drying repeatedly until a target value of total carried weight is reached; calcining to obtain the integrated Co / La-CeO2 catalyst. The catalyst is resistant to high temperature and free of deposition when calcined at about 900 DEG C; a coating layer is firmly adhered with ultrasonic peeling rate of 1.6-2.1%; the catalyst has good antitoxic capacity and high catalytic activity for VOCs containing fluorine and chlorine, the materials are easy to obtain, the process is simple, the cost is low, and the catalyst is easy to produce on industrial scale; the catalyst has stable reuse stability, the synthetic process is environment-friendly with no pollution byproducts produced, and the process is widely applicable.

Description

technical field [0001] The invention relates to a preparation method for catalytic combustion of VOCs containing fluorine and chlorine, and belongs to the technical fields of environmental protection catalytic materials and air pollution control. Background technique [0002] Most of the chemical components of VOCs are toxic, which can pose a great threat to human health and the ecological environment, such as acute and chronic poisoning, and even carcinogenicity and mutation. As the precursor of PM2.5, VOCs react with nitrogen oxides in the air to form photochemical smog under light conditions, causing direct or indirect harm to human health. When the VOCs of halogenated hydrocarbons diffuse into the ozone layer, they will chemically react with ozone, resulting in a decrease in ozone concentration, forming an ozone hole, and causing a series of ecological disasters such as the greenhouse effect. [0003] The catalytic combustion method can realize the complete oxidation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
CPCB01J23/005B01J23/83B01J37/0018B01J35/613B01J35/615
Inventor 赵伟荣胡月霞
Owner JIANGSU ANQIER WASTE GAS PURIFICATION
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