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Block Ru-Pt organic waste gas purification catalyst and preparation method thereof

A technology for purifying catalysts and organic waste gas, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve cost reduction, low loading, and facilitate popularization and application Effect

Pending Publication Date: 2022-06-28
HANGZHOU SENFA ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] So far, no monolithic catalyst for industrial application with Ru-Pt as the main active component and a broad spectrum of excellent catalytic activity at low loadings has been found so far.

Method used

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  • Block Ru-Pt organic waste gas purification catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Preparation of coating paste: Weigh micron r-Al 2 O 3 Powder 404, 401 each 200g, 409: 100g, micron Ce(OH) 3 : 120g, Ca(OH) 2 : 10g, H 2 O: 5000g is placed in the barrel of the sand mill, the speed of the sand mill is started at 1300 rpm, the sand mill is circulated for 90 minutes, and it is discharged for 24 hours.

[0040] 2. Coating preparation:

[0041] ①Take 10 pieces of cordierite ceramic honeycomb (200 holes / inch2) [100*100*50], weigh the total mass of 2650.8g, the average mass of 265.1g / piece, soak in clean water for 30 minutes, take out and blow with compressed air To remove the residual water in the pores of the honeycomb body and its periphery, the total mass was weighed to be 3233.1g, the increment was 582.3g, and the average water absorption rate was 22.0%.

[0042] ② Take 1 / 2 of the total amount of sol in step 1, use H 2 O Adjust the density of the sol to about 1.06, add 100ml of neutral silica sol, and stir well.

[0043] ③10 pieces of cordierite...

Embodiment 2

[0049] The catalyst carrier is the same as that of Example 1, and the preparation method of the active liquid is the same as that of Example 1, except that the molar ratio of the active component Ru:Pt is 3:1, and the concentration of the active liquid is 0.20%. The dipping method for dry decomposition is the same as in Example 1, and the total loading of Ru-Pt is 0.23 g / L.

Embodiment 3

[0051] The catalyst carrier, active component solution preparation, loading method and drying decomposition are the same as in Example 1, except that the active component Ru:Pt molar ratio is 5:1, the active solution concentration is 0.38%, and the total loading amount of Ru-Pt It is 0.44g / L.

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Abstract

The invention relates to a blocky Ru-Pt organic waste gas purification catalyst and a preparation method thereof, the catalyst is characterized in that a thin-wall cordierite ceramic honeycomb body is coated with a layer of composite oxide of r-Al2O3, CeO2, CaO and SiO to form a catalyst carrier, and noble metals Ru and Pt are used as main active components. And the total mass of the composite oxide coating accounts for 2.0-5.0% of the mass of the carrier. Preferably, the mass ratio of the r-Al2O3 to the CeO2 to the CaO to the SiO is 1: (0.2 to 0.5): (0.05 to 0.1): (0.05 to 0.1). The total loading capacity of the active component Ru-Pt is 0.1-0.5 g / L, and the molar ratio of Ru to Pt is (2-10): 1. The prepared blocky Ru-Pt organic waste gas purification catalyst is relatively low in raw material cost, excellent in catalyst performance, high in activity and good in stability. The whole process of the catalyst preparation process is free of emission of waste water and waste gas harmful to the environment, and industrial production is easy.

Description

technical field [0001] The invention relates to a bulk Ru-Pt organic waste gas purification catalyst and a preparation method thereof. The product is used in the catalytic purification of industrial organic waste gas to eliminate the harm of organic pollutants to the environment and human health. It is an environmentally friendly product. The preparation method and its application belong to the technical field of catalysts. Background technique [0002] Industrial organic waste gas involves a wide range of organic waste gas in the production process of organic chemical industry, pharmaceutical chemical industry, petrochemical industry, paint, coating, printing, automobile, machinery, electronics, furniture and other industries. The so-called organic waste gas refers to the gas containing volatile organic compounds (Volatile Organic Compounds) (referred to as VOC). S ), such as aromatic hydrocarbons, alkanes, alkenes, ketones, alcohols, aldehydes, acids, esters and organic ...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01J35/04F23G7/07
CPCB01J23/63B01J23/002F23G7/07B01J2523/00F23G2209/14B01J35/56B01J2523/23B01J2523/31B01J2523/3712B01J2523/41B01J2523/821B01J2523/828
Inventor 袁贤鑫袁越强方萍周晨倩
Owner HANGZHOU SENFA ENVIRONMENTAL PROTECTION TECH
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