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Catalyst for nitrous oxide decomposition and preparation method of catalyst

A nitrous oxide and catalyst technology, which is applied in the field of nitrous oxide decomposition catalyst and its preparation, can solve the problems of easy peeling off of the coating, high cost, complicated operation, etc., and achieve the effect of firm coating and short preparation time

Inactive Publication Date: 2019-04-16
上海国瓷新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, catalysts in industrial applications must be molded to have a certain structure. At present, the main molding method is to extrude catalyst powder, but molecular sieve extrusion molding or coating immobilization has problems such as high cost, complicated operation, and easy peeling off of the coating.

Method used

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  • Catalyst for nitrous oxide decomposition and preparation method of catalyst
  • Catalyst for nitrous oxide decomposition and preparation method of catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a catalyst preparation method for the decomposition of nitrous oxide, comprising the following steps:

[0041] 1) Use ethyl orthosilicate as the silicon source, aluminum isopropoxide as the aluminum source, and N,N,N-trimethyl-1-adamantyl ammonium hydroxide as the template; press 30SiO 2 :Al 2 o 3 :24C 13 h 25 NO:120H 2 Molar ratio of O, adding silicon source, aluminum source, N,N,N-trimethyl-1-adamantyl ammonium hydroxide to water, and adjusting the pH value to 13-14, and preparing a molecular sieve mother liquor; Said molecular sieve mother liquor emulsification 2h;

[0042] 2) At a temperature of 80°C, soak honeycomb cordierite (specification: 400cpsi, 6.5mil; cut into square blocks of 10mm×10mm×10mm size) into a 15% nitric acid solution for 2 hours, and then use Wash with deionized water until neutral, then dry;

[0043] 3) In a hydrothermal reaction kettle, immerse the dried cordierite in step 2) into the molecular sieve mother liquo...

Embodiment 2

[0046] This embodiment provides a catalyst preparation method for the decomposition of nitrous oxide, comprising the following steps:

[0047] 1) Use ethyl orthosilicate as the silicon source, aluminum isopropoxide as the aluminum source, and N,N,N-trimethyl-1-adamantyl ammonium hydroxide as the template; press 30SiO 2 :Al 2 o 3 :24C 13 h 25 NO:120H 2Molar ratio of O, adding silicon source, aluminum source, N,N,N-trimethyl-1-adamantyl ammonium hydroxide to water, and adjusting the pH value to 13-14, and preparing a molecular sieve mother liquor; Said molecular sieve mother liquor emulsification 2h;

[0048] 2) Soak the honeycomb cordierite (specification: 600cpsi, 4mil; cut into square blocks with a size of 10mm×10mm×10mm) in 20% nitric acid solution for 3 hours at a temperature of 85°C, and then use Wash with ionized water until neutral, then dry;

[0049] 3) In a hydrothermal reaction kettle, immerse the dried cordierite in step 2) into the molecular sieve mother liqu...

Embodiment 3

[0052] This embodiment provides a catalyst preparation method for the decomposition of nitrous oxide, comprising the following steps:

[0053] 1) Use ethyl orthosilicate as the silicon source, aluminum isopropoxide as the aluminum source, and N,N,N-trimethyl-1-adamantyl ammonium hydroxide as the template; press 30SiO 2 :Al 2 o 3 :24C 13 h 25 NO:120H 2 Molar ratio of O, adding silicon source, aluminum source, N,N,N-trimethyl-1-adamantyl ammonium hydroxide to water, and adjusting the pH value to 13-14, and preparing a molecular sieve mother liquor; Said molecular sieve mother liquor emulsification 2h;

[0054] 2) Soak honeycomb cordierite (specification: 600cpsi, 4mil; cut into square blocks with a size of 10mm×10mm×10mm) into a nitric acid solution with a concentration of 20% for 3 hours at a temperature of 85°C, Then wash with deionized water until neutral, then dry;

[0055] 3) In a hydrothermal reaction kettle, immerse the dried cordierite in step 2) into the molecula...

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Abstract

The invention relates to a catalyst for nitrous oxide decomposition and a preparation method of the catalyst. The preparation method comprises the following steps that 1) a silicon source, an aluminumsource and an organic template are added into water and adjusted to be alkaline to prepare a molecular sieve mother liquor; 2) a porous ceramic carrier is immersed in the molecular sieve mother liquor for crystallization; 3) metal ion exchange is performed on the crystallized porous ceramic carrier in step 2) to obtain a porous ceramic carrier containing a metal ion / molecular sieve; high-temperature calcination is carried out to obtain the catalyst. The molecular sieve in the preparation method is directly synthesized in situ on the porous ceramic carrier, a coating is firmly combined with the carrier, the catalyst is used for catalyzing N2O after the exchange with active components is performed, the degrading activity is high, and the water resistance is strong.

Description

technical field [0001] The invention belongs to the technical field of compound preparation, and in particular relates to a catalyst for decomposing nitrous oxide and a preparation method thereof. Background technique [0002] N 2 O is a greenhouse gas, one of the six greenhouse gases stipulated in the Kyoto Protocol. Although its content in the atmosphere is relatively low, at the same concentration the greenhouse effect is CO 2 310 times. It also has a destructive effect on the ozone layer, and can exist stably in the atmosphere without being easily degraded. N 2 The main sources of O are nature (soil, ocean and atmosphere) and human activities (adipic acid, nitric acid production, fossil fuel combustion, waste incineration process and vehicle exhaust, etc.), so N 2 The removal of O is of great significance for environmental protection. [0003] Catalytic decomposition technology is N 2 One of the main technologies for emission reduction. Under the action of cataly...

Claims

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Application Information

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IPC IPC(8): B01J29/76B01J29/74B01D53/86B01D53/56
CPCB01D53/8628B01D2255/1025B01D2255/20738B01D2255/20746B01D2255/20761B01D2257/402B01J29/7476B01J29/7676Y02C20/10
Inventor 宋锡滨李智刘欢彭冲林德宝田琰
Owner 上海国瓷新材料技术有限公司
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