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Preparation method and application of europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst

A technology of rhodium catalyst and solid solution, which is applied in the field of low-temperature and high-efficiency catalytic combustion to eliminate VOCs, and can solve the problem of high VOCs reaction temperature

Inactive Publication Date: 2020-06-16
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few researches on the catalytic combustion elimination of VOCs at home and abroad, and the reaction temperature for complete catalytic elimination of VOCs is relatively high.

Method used

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  • Preparation method and application of europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst
  • Preparation method and application of europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst
  • Preparation method and application of europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst

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Experimental program
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Effect test

Embodiment 1

[0021] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0022] zirconium oxynitrate ZrO(NO 3 ) 2 ·H 2 O and cerium nitrate Ce(NO 3 ) 3 ·6H 2 O was added to 50mL distilled water and stirred to form a mixed solution, the concentration of cerium nitrate solution was 0.05mol / L, n[ZrO(NO 3 )2 ]: n[Ce(NO 3 ) 3 ]=0.1:1.0. In addition, HPMA is added to 20mL of phenolic resin-containing 20wt% ethanol solution and mixed and stirred to form a surfactant solution, wherein HPMA:phenolic resin=0.01mL:1mL, it is added to the above mixed solution of cerium and zirconium to increase the concentration of the solution Dispersion of medium salt. Then 0.5g C-FDU-15 (Yan Meng, Dong Gu, et.al.Angew.Chem.Int.Ed.2005,44,7053–7059) was added to the above mixed solution to form a suspension, wherein Ce(NO 3 ) 3 : C-FDU-15=0.0025-0.005mol: 1g, and at 5W / cm 2 Ultrasonic at the intensity of 1h, reflux at 80°C for 24h, 80°C rotary e...

Embodiment 2

[0027] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0028] zirconium oxynitrate ZrO(NO 3 ) 2 ·H 2 O and cerium nitrate Ce(NO 3 ) 3 ·6H 2 O was added to 70mL distilled water and stirred to form a mixed solution, the concentration of cerium nitrate solution was 0.07mol / L, n[ZrO(NO 3 ) 2 ]: n[Ce(NO 3 ) 3 ]=0.5:0.5. In addition, HPMA is added to the 25wt% ethanol solution containing phenolic resin of 30mL and mixed and stirred to form a surfactant solution, wherein HPMA: phenolic resin=0.03mL: 1mL, it is added in the mixed solution of above cerium zirconium, to increase Dispersion of salt in solution. Then 0.7g C-FDU-15 (Yan Meng, Dong Gu, et.al.Angew.Chem.Int.Ed.2005,44,7053–7059) was added to the above mixed solution to form a suspension, wherein Ce(NO 3 ) 3 : C-FDU-15=0.003mol: 1g, and at 5W / cm 2 Ultrasonic at the intensity of 1h, reflux at 80°C for 24h, 80°C rotary evaporation to evaporate the sol...

Embodiment 3

[0033] (1) the preparation method of above-mentioned catalyst provided by the present invention, comprises the steps:

[0034] zirconium oxynitrate ZrO(NO 3 ) 2 ·H 2 O and cerium nitrate Ce(NO 3 ) 3 ·6H 2 O was added to 90mL distilled water and stirred to form a mixed solution, the concentration of cerium nitrate solution was 0.09mol / L, n[ZrO(NO 3 ) 2 ]: n[Ce(NO 3 ) 3 ]=1.0:1.0. In addition, HPMA is added to 40mL of phenolic resin-containing 28wt% ethanol solution and mixed and stirred to form a surfactant solution, wherein HPMA:phenolic resin=0.04mL:1mL, it is added to the above mixed solution of cerium and zirconium to increase the concentration of the solution Dispersion of medium salt. Then 0.9g C-FDU-15 (Yan Meng, Dong Gu, et.al.Angew.Chem.Int.Ed.2005,44,7053–7059) was added to the above mixed solution to form a suspension, wherein Ce(NO 3 ) 3 : C-FDU-15=0.004mol: 1g, and at 9W / cm 2 Ultrasonic at the intensity of 2h, reflux at 90°C for 48h, and evaporate the ...

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Abstract

The invention discloses a preparation method and application of a europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst. The preparation method of the catalyst comprisesthe following steps: under adjusting effect of a surfactant and a dispersing agent, subjecting zirconium oxynitrate, cerous nitrate and mesoporous carbon to a reflux reaction; carrying out heat treatment to prepare a CeZrO solid solution; preparing Eu-Dy / CeZrO by doping rare earth europium and dysprosium complexes into the solid solution through an impregnation method, and then preparing an europium-dysprosium-doped cerium-zirconium solid solution supported rhodium catalyst Rh / Nd-Dy / CeZrO with high thermal stability (higher than 650 DEG C) through loading Rh by a coprecipitation method and hydrogen reduction. The catalyst prepared by the preparation method disclosed by the invention has relatively high elimination efficiency on high space velocity (60,000 h<-1> to 100,000 h<-1>) and low-concentration ethyl acetate (500 ppm to 1,000 ppm) and formaldehyde (50 ppm to 100 ppm). The catalyst prepared by the invention has the advantages of cheap raw materials, simple catalyst preparation process, strong practicability, low temperature for complete elimination of VOCs, high efficiency, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the preparation of a rhodium Rh / Nd-Dy / CeZrO catalyst supported on a europium-dysprosium doped cerium-zirconium solid solution for catalytic combustion and elimination of volatile organic compounds (VOCs), and its system for low-temperature and high-efficiency catalytic combustion elimination of VOCs things. Background technique [0002] Ethyl acetate (C 4 h 8 o 2 ) is a typical volatile organic compound (VOCs), which has excellent solubility and quick drying, and is a widely used organic chemical raw material and industrial solvent. It is widely used in the production process of acetate fiber, ethyl fiber, chlorinated rubber, vinyl resin, acetate resin, synthetic rubber, paint and paint. Formaldehyde (HCHO) is a typical volatile organic compound (VOCs), which mainly comes from building materials, plastics, cement and paints. Prolonged exposure to air containing formaldehyde can cause serious harm to human health. Therefore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J35/10F23G7/07
CPCB01J23/63F23G7/07B01J35/61
Inventor 叶青董宁陈梦月傅之丹陈永宝
Owner BEIJING UNIV OF TECH
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