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Preparation method of volatile organic compound catalytic combustion catalyst

A volatile organic compound, catalytic combustion technology, applied in the direction of catalyst activation/preparation, combustion methods, physical/chemical process catalysts, etc., can solve the problems of volatile loss and agglomeration, and achieve the effect of not easy volatile loss

Active Publication Date: 2021-05-04
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to their high activity, noble metal nanoparticles are often prone to agglomeration during the reaction process.
In addition, these noble metal nanoparticles will also be combined with CO, etc. during the reaction process, so that they will be volatilized and lost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 100gZrOCl 2 8H2O and ammonia water (containing 10gHN 3 ) was prepared into a mixed solution, which was slowly stirred at room temperature for 4 hours to form a viscous glue; the resulting glue was dried at 300°C for 3 hours to obtain an amorphous ZrO 2 ; the amorphous ZrO 2 Put it into a low-temperature plasma reactor, fix it in the discharge area; pass hydrogen gas into the reactor at a certain flow rate at room temperature, and treat it for four hours at a discharge power of 20W to obtain ZrO 2-x ; Take ZrO 2-x Mix well with an appropriate amount of chloroplatinic acid solution, immerse at room temperature for 12 hours, and then dry and dehydrate at 100°C to obtain a catalyst precursor with a noble metal loading of 0.2%. The gas flow rate of min was passed into helium, and the volatile organic compound catalytic combustion catalyst was obtained by plasma discharge and treated under the condition of discharge power of 5W for 2 hours. The obtained catalyst is put in...

Embodiment 2

[0026] 100gZrOCl 2 8H2O and ammonia water (containing 10gHN 3 ) was prepared into a mixed solution, which was slowly stirred at room temperature for 4 hours to form a viscous glue; the resulting glue was dried at 300°C for 3 hours to obtain an amorphous ZrO 2 ; the amorphous ZrO 2 Put it into a low-temperature plasma reactor, fix it in the discharge area; pass hydrogen into the reactor at a flow rate of 100mL / min at room temperature, and treat it for four hours at a certain discharge power to obtain ZrO 2-x ; Take ZrO 2-x Mix well with an appropriate amount of chloroplatinic acid solution, immerse at room temperature for 12 hours, and then dry and dehydrate at 100°C to obtain a catalyst precursor with a noble metal loading of 0.2%. The gas flow rate of min was passed into helium, and the volatile organic compound catalytic combustion catalyst was obtained by plasma discharge and treated under the condition of discharge power of 5W for 2 hours. The obtained catalyst is put ...

Embodiment 3

[0030] 100gZrOCl 2 8H2O and ammonia water (containing 10gHN 3 ) was prepared into a mixed solution, which was slowly stirred at room temperature for 4 hours to form a viscous glue; the resulting glue was dried at 300°C for 3 hours to obtain an amorphous ZrO 2 ; the amorphous ZrO 2 Put it into a low-temperature plasma reactor, fix it in the discharge area; pass hydrogen into the reactor at a flow rate of 100mL / min at room temperature, and treat it for four hours at a discharge power of 20W to obtain ZrO 2-x ; Take ZrO 2-x Mix well with an appropriate amount of noble metal precursor solution, immerse at room temperature for 12 hours, dry and dehydrate at 100°C to obtain a catalyst precursor with a noble metal loading of 0.2%; put the precursor into a plasma reactor, The gas flow rate of / min was passed into helium, and the volatile organic compound catalytic combustion catalyst was obtained by plasma discharge and treated under the condition of discharge power of 5W for 2 hou...

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Abstract

The invention discloses a preparation method of a volatile organic compound catalytic combustion catalyst. The preparation method comprises the following steps: firstly, preparing zirconium dioxide ZrO2 with an amorphous structure by a sol-gel method, then carrying out plasma treatment on the zirconium dioxide ZrO2 in a hydrogen atmosphere to form ZrO2-x, fixing a nano-scale noble metal active center on the surface of the amorphous zirconium dioxide by utilizing the space confinement effect of ZrO2-x to obtain a catalyst precursor, and then repeatedly utilizing a low-temperature plasma discharge technology, feeding the precursor into a reactor by taking helium as carrier gas, and under the condition of high-voltage discharge, colliding high-energy free radicals with a precursor material to limit and immobilize noble metals, thereby obtaining the supported catalytic combustion catalyst which is good in dispersity and has an active center which is not easy to volatilize and lose in the reaction process. The preparation method provided by the invention overcomes the problems of agglomeration, loss and the like of the surface active center of the catalyst in the traditional preparation method, and has important industrial application significance.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and relates to a method for preparing a volatile organic compound catalytic combustion catalyst, in particular to a technology for preparing a noble metal supported catalyst by low-temperature plasma. Background technique [0002] Volatile organic compounds are various organic compounds with a boiling point of 50 to 260°C at room temperature. In my country, volatile organic compounds are one of the main air pollutants, which not only cause harm to the human body and the environment, but also further cause secondary pollution such as photochemical smog and PM2.5. At present, VOC control technologies mainly include adsorption method, direct incineration method, photodegradation method, plasma method and catalytic combustion method. Among them, the catalytic combustion method has attracted the attention of the industry due to its characteristics of low elimination temperature, low energy consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J37/03B01J37/08B01J37/34B01J37/02F23G7/07
CPCB01J23/42B01J23/44B01J37/038B01J37/082B01J37/349B01J37/0207F23G7/07F23G2209/14B01J35/23
Inventor 张蕾金晓勇项权沂徐赫王卉周洁
Owner HANGZHOU DIANZI UNIV