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Preparation method and application of monolithic catalyst for treating CVOC

A monolithic catalyst and pretreatment technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low light-off temperature, treatment efficiency, influence on elimination effect, catalyst poisoning, etc., and achieve the promotion of catalysis The effects of activity, high specific surface area, and good development prospects

Pending Publication Date: 2022-03-18
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Catalytic oxidation is considered to be the most promising CVOC elimination technology due to its advantages of low light-off temperature, high treatment efficiency, and less likely to generate secondary pollution. However, the HCl and Cl produced in the CVOC oxidation process 2 It can poison the catalyst and deactivate it, affecting its elimination effect

Method used

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  • Preparation method and application of monolithic catalyst for treating CVOC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) The commercially available cordierite honeycomb ceramic material was cut into cubic samples with a size of 15mm×15mm×15mm, washed with distilled water, pretreated with 15% nitric acid solution at 80°C for 5 hours, and then the carrier Wash with distilled water, dry in an oven at 100°C for 4h and cool to room temperature.

[0036] 2) Using zeolite molecular sieve as the second carrier layer, add morpholine, AI 2 o 3 , SiO 2 ,P 2 o 5 and deionized water, the molar ratio is 3:1:0.25:1:60 and step 1) pretreated cordierite honeycomb ceramic carrier, reacted at 200°C for 48h, cooled to room temperature, dried at 100°C for 4h, cooled The sample was calcined at 700° C. for 5 h at a heating rate of 5° C. / min, and cooled to room temperature to obtain a sample with a second support layer, wherein the loading of the second support layer was 20%.

[0037] 3) Take analytically pure grade tetrabutyl titanate and move it into the polytetrafluoroethylene liner of the autoclave, ...

Embodiment 2

[0041] 1) The commercially available cordierite honeycomb ceramic material was cut into cubic samples with a size of 15mm×15mm×15mm, washed with distilled water, pretreated with 15% nitric acid solution at 80°C for 5 hours, and then the carrier Wash with distilled water, dry in an oven at 100°C for 4h and cool to room temperature.

[0042] 2) Using zeolite molecular sieve as the second carrier layer, add morpholine, AI 2 o 3 , SiO 2 ,P 2 o 5 , the molar ratio is 3:1:0.38:1:60 and step 1) pretreated cordierite honeycomb ceramic carrier, reacted at 200°C for 48h, cooled to room temperature, dried at 100°C for 4h, and cooled the sample at 5°C Calcination at a heating rate of 700° C. for 5 h at a heating rate of 1 / min, and cooling to room temperature to obtain a sample with a second support layer, wherein the loading of the second support layer is 20%.

[0043] 3) Take analytically pure grade tetrabutyl titanate and move it into the polytetrafluoroethylene liner of the autocl...

Embodiment 3

[0047] 1) The commercially available cordierite honeycomb ceramic material was cut into cubic samples with a size of 15mm×15mm×15mm, washed with distilled water, pretreated with 15% nitric acid solution at 80°C for 5 hours, and then the carrier Wash with distilled water, dry in an oven at 100°C for 4h and cool to room temperature.

[0048] 2) Using zeolite molecular sieve as the second carrier layer, add morpholine, AI 2 o 3 , SiO 2 ,P 2 o 5 and deionized water, the molar ratio is 3:1:0.6:1:60 and step 1) pretreated cordierite honeycomb ceramic carrier, reacted at 200°C for 48h, cooled to room temperature, dried at 100°C for 4h, cooled The sample was calcined at 700° C. for 5 h at a heating rate of 5° C. / min, and cooled to room temperature to obtain a sample with a second support layer, wherein the loading of the second support layer was 20%.

[0049] 3) Take analytically pure grade tetrabutyl titanate and move it into the polytetrafluoroethylene liner of the autoclave, a...

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Abstract

The invention discloses a preparation method of a monolithic catalyst for treating CVOC and application of the catalyst under a microwave-induced electrodeless ultraviolet condition, and belongs to the field of catalyst preparation. The monolithic catalyst for treating the CVOC is obtained through preparation of the carrier, preparation of the active component and preparation of the monolithic catalyst, the catalyst catalyzes and oxidizes the CVOC under the microwave-induced electrodeless ultraviolet condition, the preparation process of the monolithic catalyst is short in time consumption, the performance is excellent, large-scale production and industrial application are easy, and the monolithic catalyst has good development prospects.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a preparation method for treating a CVOC monolithic catalyst and the application of the catalyst under microwave-induced infinite ultraviolet conditions. Background technique [0002] Chlorine-containing volatile organic compounds (CVOCs) are raw materials for organic chemicals such as plastics and rubber, and are also by-products of these industries. In recent years, with the continuous development of organic chemical industry and chlorine product chemical industry, chlorine-containing organic waste gas (CVOC) in VOCs is discharged into the air in large quantities as its reaction intermediates and by-products. Volatile chlorine-containing hydrocarbons, such as methyl chloride, ethyl chloride, and vinyl chloride, have high volatility, can easily change from liquid phase to gas phase, and are quite stable in the atmosphere, and can not degrade for a long time. [0003] Accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/34B01J29/85B01J35/00B01J37/02B01D53/86B01D53/70
CPCB01J21/063B01J23/34B01J29/85B01J37/0242B01D53/8662B01D2259/804B01D2259/806B01J35/39Y02C20/30
Inventor 王欣臧文丽张丁超郭斌任爱玲王树桥
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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