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VOCs catalytic combustion monolithic metal foam catalyst and preparation and application thereof

An integral catalyst, catalyst technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. problem, to achieve the effect of simple and flexible preparation method, strong thermal shock resistance and stability

Pending Publication Date: 2020-12-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of the metal carrier is relatively smooth and the thermal expansion rate is high. The traditional coating preparation method is not only cumbersome, but also the coating is not firm and the adhesion to the carrier is poor.
In addition, the loading method of the active components of the existing precious metal catalysts is relatively complicated, and the requirements for the type of carrier materials are high, and it is not easy to carry out industrial scale-up production quickly and conveniently.

Method used

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  • VOCs catalytic combustion monolithic metal foam catalyst and preparation and application thereof
  • VOCs catalytic combustion monolithic metal foam catalyst and preparation and application thereof
  • VOCs catalytic combustion monolithic metal foam catalyst and preparation and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0046] The preparation method of noble metal monolith catalyst of the present invention comprises the steps:

[0047] (1) Preparation of chloroplatinic acid solution: weigh 1.66-8.3g of H 2 PtCl 6 ·6H 2 Dissolve O in 250ml of water, and configure it into a mother liquor of 2.5-12.5g / L (based on the mass of platinum), and prepare chloroplatinic acid solutions of different concentrations with the mother liquor of 2.5-12.5g / L as the impregnated adsorption solution.

[0048] (2) Preparation of chloropalladium acid solution: weigh 0.5-2.5g of PdCl 2 Dissolve in 100ml of water, then add 2.78~13.9ml2.0mol / L HCl solution, then heat the mixed solution until dissolved, and finally settle to 250ml of mother liquor with a concentration of 1.2~6g / L (based on the quality of palladium). The 1.2-6g / L mother liquor is prepared with different concentrations of chloropalladium acid solution as the impregnation and adsorption solution.

[0049] (3) Pretreatment of foamed nickel: first put the...

Embodiment 1

[0056] Take 0.72ml of 2.5g / L (based on the mass of platinum) mother liquor and 9.28ml of water and mix it into a 10ml solution in a centrifuge tube. Put 0.9g of pretreated nickel foam into the centrifuge tube and place in a water bath at 20°C Under dipping and replacement, measure the concentration change of the solution every 10 minutes with a UV spectrophotometer until the Pt ion concentration becomes 0, then filter and dry, and the obtained product is recorded as 0.2% Pt / Ni-foam-20°C.

Embodiment 2

[0058] The conditions are the same as in Example 1, and the temperature of the water bath is changed to 30°C, which is recorded as 0.2%Pt / Ni-foam-30°C.

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Abstract

The invention provides a noble metal monolithic catalyst which takes foamed nickel as a carrier and Pt or Pd as an active component, and the mass loading capacity of the active component is 0.1-1%. The catalyst is prepared by an ion exchange method, and the reaction temperature is 20-90 DEG C; the preparation method of the noble metal integral foam nickel catalyst is simple and flexible, and the noble metal integral foam nickel catalyst has excellent activity in catalytic combustion of VOCs, and has excellent water resistance, thermal shock resistance and very high stability.

Description

technical field [0001] The invention relates to the technical field of catalytic combustion of organic waste gas, and relates to a monolithic metal catalyst prepared by direct ion replacement of noble metals. Background technique [0002] In recent years, with the rapid development of urbanization and industrialization, the environmental hazards caused by the discharge of waste in various industries have become increasingly serious, especially the discharge of volatile organic compounds (VOCs) in air pollution has gradually increased, becoming a parallel with SOx and NOx. One of the three major air pollutants in China, which mainly comes from petroleum refining, petrochemical processing, dye coating and various industries using organic solvents. Volatile organic compounds (VOCs) refer to a series of organic compounds with a saturated vapor pressure greater than 70 Pa and a boiling point below 260 °C at normal temperature and pressure, such as toluene, ethyl acetate, and acet...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J37/30F23G7/07
CPCB01J23/892B01J37/30F23G7/07
Inventor 卢晗锋李剑宇陈晓周瑛耿俊胡中恒
Owner ZHEJIANG UNIV OF TECH
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