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Method for preparing high activity loading type RhxAu-x/Y nanometer catalyst

A nano-catalyst and supported technology, which is applied in the field of preparation of nano-catalytic materials, can solve the problems of uneven distribution of active components, low metal dispersion, large metal loading, etc., and achieves low cost, high metal dispersion, and catalytic performance. Highly active effect

Inactive Publication Date: 2010-06-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The active components of supported catalysts prepared by traditional preparation methods are often unevenly distributed, the metal dispersion is low, the metal loading is large, and the production cost is high

Method used

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  • Method for preparing high activity loading type RhxAu-x/Y nanometer catalyst
  • Method for preparing high activity loading type RhxAu-x/Y nanometer catalyst
  • Method for preparing high activity loading type RhxAu-x/Y nanometer catalyst

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Experimental program
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Effect test

Embodiment 1

[0029] 0.05 g of rhodium chloride (RhCl 3 ) was dissolved in 200ml deionized water, and then 5 grams of γ-Al was added 2 o 3 , transferred to storage tank 9 after fully stirring to form a slurry; 0.5 gram of sodium borohydride (NaBH 4 ) was dissolved in 50 ml deionized water and transferred to storage tank 2. Start the infusion pump 8 to make the RhCl 3 and γ-Al 2 o3 The mixed slurry circulates between the storage tank 9 and the tubular reactor 4, the flow rate is 600ml / min, the ultrasonic generator 5 is started, the frequency of the ultrasonic generator is set to 80KHZ, the temperature of the water bath is 40°C, and the metering pump 1 is set at 1.0 The rate of ml / min will NaBH 4 The solution is injected into the pipeline of the hollow ceramic membrane tube 10 in the tubular reactor 4, NaBH 4 The solution diffuses through the micropores on the wall of the hollow ceramic membrane tube to contain RhCl 3 and γ-Al 2 o 3 In the mixed slurry, when NaBH 4 After all the sol...

Embodiment 2

[0031] 0.04 grams of rhodium nitrate (Rh(NO 3 ) 3 ) and 0.016 g of chloroauric acid (HAuCl 4 ) was dissolved in 200ml deionized water, and then 5 grams of TiO 2 , transferred to storage tank 9 after fully stirring to form a slurry; 0.2 gram of sodium borohydride (NaBH 4 ) was dissolved in 50 ml deionized water and transferred to storage tank 2. Start the infusion pump 8 to make Rh(NO 3 ) 3 , HAuCl 4 and TiO 2 The mixed slurry circulates between the storage tank 9 and the tubular reactor 4, the flow rate is 800ml / min, the ultrasonic generator 5 is started, the frequency of the ultrasonic generator is set to 60KHZ, the temperature of the water bath is 40°C, and the metering pump 1 is set at 3.0 The rate of ml / min will NaBH 4 The solution is injected into the pipeline of the hollow ceramic membrane tube 10 in the tubular reactor 4, NaBH 4 The solution diffuses through the micropores on the wall of the hollow ceramic membrane tube to the 3 ) 3 , HAuCl 4 and TiO 2 In t...

Embodiment 3

[0033] With 0.031 gram of chlororhodium acid (H 3 RhCl 6 ) and 0.02 g of gold chloride (AuCl 3 ) was dissolved in 200ml deionized water, and then 5 grams of SiO 2 , transferred to the storage tank 9 after fully stirring to form a slurry; 0.5mlN 2 h 4 Dissolve in 50 ml deionized water and transfer to tank 2. Start the infusion pump 8, make H 3 RhCl 6 , AuCl 3 and TiO 2 The mixed slurry circulates between the storage tank 9 and the tubular reactor 4, the flow rate is 1000ml / min, the ultrasonic generator 5 is started, the frequency of the ultrasonic generator is set to 100KHZ, the temperature of the water bath is 40°C, and the metering pump 1 is set at 0.1 The rate of ml / min will be N 2 h 4 The solution is injected into the pipeline of the hollow ceramic membrane tube 10 in the tubular reactor 4, N 2 h 4 The solution diffuses through the micropores on the wall of the hollow ceramic membrane tube to the 3 RhCl 6 , AuCl 3 and SiO 2 In the mixed slurry, when N 2 h ...

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Abstract

The method for preparing the high-activity loading type RhxAu1-x / Y nano catalyst belongs to the preparing field of the nana catalyzing material. The application of the noble metal catalyst in the purification of the vehicle tail gas gets a large attention from the people all the time. But the price of the noble metals of Pt, Pd and Rh is high and the resource dries up increasingly, so the reducing to the noble metal usage of the three-way catalyst and manufacturing cost is the problem that needs to be settled currently. The invention uses the RhxAu1-x / Y(Y equals to the metallic oxide) nano catalyst prepared with the ultrasound-assisted dropping reaction method (UAMAR) to reactions of oxidizing the carbon monoxide and NO reducing action, etc. the nano catalyst has an excellent activity andcan be used to displace the noble metal Rh catalyst too reduce the cost of the three-way catalyst. The preparing method overcomes the disadvantages of common impregnation method to prepare the loading type metal catalyst, and the prepared nana metal catalyst has the advantages of epigranular particles of active component, narrow distribution of particle size and high catalyzing activity.

Description

technical field [0001] The present invention relates to loaded Rh x Au 1-x / (Y=metal oxide) nano-catalyst preparation method, specifically related to the preparation of a series of loaded Rh by ultrasonic membrane diffusion method (UAMR) x Au 1-x The invention relates to a method for preparing a / Y (Y=metal oxide) nanometer catalyst, which belongs to the field of preparation of nanometer catalytic materials, and the catalyst prepared by the method can be used for automobile tail gas purification. Background technique [0002] The application of noble metal catalysts in the purification of automobile exhaust has always attracted great attention. Automobile exhaust mainly contains CO, HC and NO x How to effectively purify automobile exhaust has become one of the focuses of today's global attention. Most of the currently commercially available automobile exhaust purification catalysts use Pt, Pd and Rh as active components, and La 2 o 3 and CeO 2 As an additive, with γ-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J21/04B01D53/94
Inventor 何洪关晓杨柳戴洪兴訾学红
Owner BEIJING UNIV OF TECH