Porous composite metal oxide catalytic material, synthesis method and application thereof in purification of volatile organic pollutants

A composite metal and catalytic material technology, applied in the field of air pollution control, can solve the problems of poor stability, intermediate toxic by-products, etc., and achieve the effects of low preparation cost, enhanced porosity and specific surface area, and simple synthesis method

Inactive Publication Date: 2020-09-22
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of single transition metal oxides is poor and a large number of intermediate toxic by-products are produced during the degradation of pollutants.

Method used

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  • Porous composite metal oxide catalytic material, synthesis method and application thereof in purification of volatile organic pollutants
  • Porous composite metal oxide catalytic material, synthesis method and application thereof in purification of volatile organic pollutants
  • Porous composite metal oxide catalytic material, synthesis method and application thereof in purification of volatile organic pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Preparation of Porous Composite Metal Oxide Using Surfactant Induced Soft Template Method

[0042] (1) Dissolve 1.5 g of cetyltrimethylammonium bromide in 160 mL of deionized water, and continue stirring at 900 rpm for 20 min to form a transparent and clear solution.

[0043] (2) Add 0.65 g of Pluronic F127 to the above transparent and clear solution, and fully dissolve it under stirring at 650 rpm. The purpose of adding F127 is to provide a porous template.

[0044] (3) Add 0.30 mol of copper acetate to the solution obtained in step (2), stir at 650 rpm for 10 min to dissolve completely, then add 1.25 mol of cerium nitrate, stir at 500 rpm for 10 min to dissolve completely.

[0045] (4) Next, add 0.50 mol of praseodymium nitrate to the solution obtained in step (3), and stir at 1000 rpm for 30 min to mix the components evenly.

[0046] (5) Subsequently, 4.5 g of hexamethylenetetramine was added to the solution obtained in step (4), and stirred at 1100 rpm fo...

Embodiment 2

[0049] Example 2 Preparation of various porous composite metal oxides by surfactant-induced soft template method

[0050] By replacing the praseodymium nitrate in Example 1 with holmium nitrate, different porous copper-based-rare earth metal composite oxides (CuHoCeO x ).

Embodiment 3

[0052] By replacing the praseodymium nitrate in Example 1 with europium nitrate, different porous copper-based-rare earth metal composite oxides (CuEuCeO x ).

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Abstract

The invention discloses a porous composite metal oxide catalytic material as well as a synthesis method and application thereof in purification of volatile organic pollutants. A rare earth metal saltprecursor is dissolved in deionized water and then rapidly complexed with a surfactant that is hexadecyl trimethyl ammonium bromide to form a rare earth metal oxide precursor, and the porosity and thespecific surface area of the composite metal oxide are enhanced by pre-adding pluronic F127. The catalytic material has excellent low-temperature catalytic activity and stability, and can realize deep degradation of typical volatile organic pollutant toluene discharged by an industrial source under the conditions that the temperature is 220-240 DEG C, the reaction space velocity is 40000-50000h <-1> and the oxygen concentration is 10-20vol.%. The catalytic material disclosed by the invention is simple in synthesis method and low in preparation cost, shows excellent low-temperature purification performance on low-concentration volatile organic pollutants, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a porous composite metal oxide catalytic material, a synthesis method and an application in purification of volatile organic pollutants. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to organic compounds with a boiling point lower than 260°C at normal pressure, or a saturated vapor pressure exceeding 133.32Pa at room temperature (25°C), which are emitted into the air in the form of gaseous molecules The general term for organic compounds. There are many kinds of VOCs, mainly including aliphatic hydrocarbons, oxygen-containing hydrocarbons, aromatic hydrocarbons and their derivatives, halogen-containing hydrocarbons, nitrogen-containing hydrocarbons, sulfur-containing hydrocarbons, etc. VOCs have high atmospheric chemical reactivity and are the key factor for the enhancement of atmospheric oxidation. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10B01D53/86B01D53/44
CPCB01D53/8687B01J23/002B01J23/83B01J35/1014B01J35/1038B01J2523/00B01J2523/17B01J2523/3712B01J2523/3718B01J2523/3768B01J2523/3743B01J2523/3706B01J2523/3737B01J2523/36
Inventor 何炽姜泽宇建艳飞郭政田明姣
Owner XI AN JIAOTONG UNIV
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