Sliver-based bimetallic catalyst for catalyzing oxidation of volatile organic contaminant, preparation method and application thereof

A bimetallic catalyst, a volatile organic technology, is applied in the field of the preparation of a supported nano-silver-based bimetallic catalyst, and can solve the problems of contacting the human body, high toxicity, human health hazards, etc., and achieves a simple preparation method, stable structure, and cheap raw materials. easy-to-get effect

Inactive Publication Date: 2011-03-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is highly toxic and easily enters the human body through inhalation or skin contact, causing great harm to human health.

Method used

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  • Sliver-based bimetallic catalyst for catalyzing oxidation of volatile organic contaminant, preparation method and application thereof
  • Sliver-based bimetallic catalyst for catalyzing oxidation of volatile organic contaminant, preparation method and application thereof
  • Sliver-based bimetallic catalyst for catalyzing oxidation of volatile organic contaminant, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Taking copper as the second active component and SBA-15 as the carrier as an example, the preparation method is as follows: add 0.0945g of silver nitrate and 0.2281g of copper nitrate into 5ml of deionized water at the same time, and stir to fully dissolve them. Add 1g of SBA-15 into the above mixed solution while stirring, continue to stir for a period of time, then let it stand, and continue to stir after 15 minutes to make the metal distribution as even as possible. The sample was left to stand overnight at room temperature and then dried at 100° C. for 24 hours to obtain a bimetallic catalyst sample with Ag:Cu=1:1. Sieve the dried catalyst into 20-40 mesh size particles for later use.

[0032] The activity evaluation of the catalyst was carried out in a U-shaped tubular fixed-bed continuous flow differential reactor. The reactor was a U-shaped quartz reaction tube with an inner diameter of 8 mm. 100-300 mg of catalyst was loaded into the reaction tube and pretreated...

Embodiment 2

[0034] Taking copper as the second active component and SBA-15 as the carrier as an example, the preparation method is as follows: 0.1890g of silver nitrate is added to 5ml of deionized water to obtain a bimetallic catalyst sample of Ag:Cu=1:0. The activity of the catalyst was measured on the device described in the above-mentioned Example 1, and the conversion rate of the catalyst at 290-310° C. to toluene could reach more than 90%.

Embodiment 3

[0036] According to the preparation method of the present invention in Example 1, 0.4563 g of silver nitrate was separately added to 5 ml of deionized water to obtain a Cu / SBA-15 catalyst with Ag:Cu=0:1. The activity of the catalyst was measured on the device described in the above-mentioned Example 1, and the conversion rate of the catalyst at 320-340° C. to toluene could reach more than 90%.

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Abstract

The invention claims a sliver-based bimetallic catalyst, a preparation method and application thereof, wherein the catalyst takes mesoporous molecular sieves such as SBA-15, MCM-41 or MCM-48 and etc. and oxides such as aluminium oxide, silicon oxide and cerium oxide and the like as carriers; the active ingredient of the catalyst is sliver, the second ingredient is M which is any one of transition metal selected from the group consisting of Cu, Co, Ce and Mn and etc. The synthetic method of the catalyst is characterized in that the operation is simple and easy, the synergistic effects of selected different transition metals selected to the sliver type are different, taking copper as an example, when Ag: Cu is more than 1: 2 but not more than 2: 1, the catalyst presents an obvious synergistic effect between metals, and the catalytic oxidation reactivity of volatile organic contaminant (VOC) is obviously improved. Simultaneously, the sliver-based bimetallic catalyst provided by the invention has the advantages that the price of transition metal which is used is low by comparing with platinum, palladium and gold and etc., the resource of the transition metal is rich, the catalyst is suitable for mass production and industrial application and the application value and the application prospect are good.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and relates to a method for preparing a bimetallic catalyst, in particular to a method for preparing a supported nano silver-based bimetallic catalyst with dual functions of adsorption and catalysis and its application. The second component is transition Any one of metal Cu, Co, Ce, Mn, etc. Background technique [0002] Toluene, as a representative pollutant among volatile organic compounds (VOCs), widely exists in paint, coating spraying and operations using organic adhesives, as well as in the processing of food, oil, leather and wool. It is highly toxic and easily enters the human body through inhalation or skin contact, causing great harm to human health. Therefore, it is imperative to develop VOCs treatment technology represented by toluene. [0003] Catalytic combustion method is one of the most effective and commonly used methods to eliminate VOCs pollution, which has the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/68B01J37/02B01D53/86B01D53/72
Inventor 曲振平张薇薇
Owner DALIAN UNIV OF TECH
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