Preparation method for supported catalyst for catalyzing combustion of VOCs (Volatile Organic Compounds)

A supported catalyst, catalytic combustion technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as hindering application and macromolecular diffusion limitations, and achieve reduced dosage and good hydrothermal stability. and anti-sulfur performance, improve the effect of catalytic oxidation ability

Inactive Publication Date: 2016-08-24
碗海鹰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limitation of macromolecular diffusion caused by the single micropore structure on the traditional ZSM-5 zeolite molecular sieve seriously hinders its application as a carrier in VOCs catalytic combustion catalysts.

Method used

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  • Preparation method for supported catalyst for catalyzing combustion of VOCs (Volatile Organic Compounds)
  • Preparation method for supported catalyst for catalyzing combustion of VOCs (Volatile Organic Compounds)

Examples

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Embodiment 1

[0018] A method for preparing a supported catalyst for catalytic combustion of VOCs in this embodiment, wherein: it consists of a specific surface area ≥ 500m 2 / g, high specific surface area ZSM-5 molecular sieve and metal precursor with specific pore volume ≥0.6mL / g are made; the specific preparation method comprises the following steps:

[0019] 1) Make the specific surface area ≥ 500m 2 / g, the high specific surface area ZSM-5 molecular sieve with a specific pore volume ≥0.6mL / g is dried at 100°C for 2 hours to remove the moisture adsorbed in the high specific surface area ZSM-5 molecular sieve;

[0020] 2) Copper nitrate is mixed with water, stirred and dissolved to obtain a solution, wherein the mass ratio of the copper metal to the ZSM-5 molecular sieve after step 1) pretreatment is 0.01, and the amount of water is after step 1) pretreatment The quality of the ZSM-5 molecular sieve × specific pore volume;

[0021] 3) Stir and mix the solution prepared in step 2) with ...

Embodiment 2

[0026] A method for preparing a supported catalyst for catalytic combustion of VOCs in this embodiment, wherein: it consists of a specific surface area ≥ 500m 2 / g, high specific surface area ZSM-5 molecular sieve and metal precursor with specific pore volume ≥0.6mL / g are made; the specific preparation method comprises the following steps:

[0027] 1) Make the specific surface area ≥ 500m 2 / g, the high specific surface area ZSM-5 molecular sieve with a specific pore volume ≥0.6mL / g is dried at 120°C for 4 hours to remove the moisture adsorbed in the high specific surface area ZSM-5 molecular sieve;

[0028] 2) Mix copper nitrate, manganese nitrate and cerium nitrate with water, stir and dissolve to obtain a solution, wherein the mass ratio of copper metal, manganese metal and cerium metal is 2:2:1, copper metal, manganese metal and cerium metal The mass ratio of the total mass and step 1) ZSM-5 molecular sieve after pretreatment is 0.10, and the consumption of water is the q...

Embodiment 3

[0035] Such as figure 1 Shown, the experimental result of catalyst catalytic combustion toluene:

[0036] A method for preparing a supported catalyst for catalytic combustion of VOCs in this embodiment, wherein: it consists of a specific surface area ≥ 500m 2 / g, high specific surface area ZSM-5 molecular sieve and metal precursor with specific pore volume ≥0.6mL / g are made; the specific preparation method comprises the following steps:

[0037] 1) Make the specific surface area ≥ 500m 2 / g, the high specific surface area ZSM-5 molecular sieve with a specific pore volume ≥0.6mL / g is dried at 110°C for 3 hours to remove the moisture adsorbed in the high specific surface area ZSM-5 molecular sieve;

[0038] 2) Mix copper nitrate and manganese nitrate with water, stir and dissolve to obtain a solution, wherein the mass ratio of copper metal to manganese metal is 1:1, and the total mass of copper metal and manganese metal is the same as step 1) ZSM after pretreatment The mass r...

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Abstract

The invention belongs to the technical field of environmental protection and catalysts, and in particular relates to a preparation method of a supported catalyst for catalytic combustion of VOCs. It is made of ZSM-5 molecular sieve with high specific surface area and metal precursor; it is dried on ZSM-5 molecular sieve with high specific surface area to remove the adsorbed moisture; then the metal precursor is mixed with water, stirred and dissolved to obtain a solution; The prepared solution is stirred and mixed with the pretreated ZSM‑5 molecular sieve, left standing, dried, calcined, and cooled to normal temperature to obtain a supported catalyst for catalytic combustion of VOCs. The catalyst of the present invention uses ZSM-5 molecular sieve with high specific surface area as the carrier, which can reduce the amount of active components and cost, and at the same time, facilitate the adsorption of pollutants on the surface of the catalyst. The catalytic oxidation ability of the catalyst to VOCs is improved, and the benzene series (such as toluene) in the VOCs can be efficiently removed by catalytic combustion at low temperature. Moreover, the catalyst has low cost, simple process, good hydrothermal stability and sulfur resistance performance.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and catalysts, and in particular relates to a preparation method of a supported catalyst for catalytic combustion of VOCs. Background technique [0002] Volatile Organic Compounds (VOCs for short) in the exhaust gas of fine chemical, petrochemical, pharmaceutical and other industries are the most typical pollution sources of the current atmospheric environment. There are many types of them, mainly including: benzene series, olefins, alcohols, aldehydes Classes, organic chlorides, etc. Most VOCs gases are poisonous and odorous, and some VOCs such as benzene series (benzene, toluene, xylene, etc.) even have strong carcinogenicity and genotoxicity. With the rapid development of the economy, especially in some coastal cities where the light industry is relatively concentrated, the discharge of industrial waste gas containing benzene series is increasing, which poses a huge threat to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01J29/46
CPCB01J29/48B01J29/46B01J2229/18
Inventor 碗海鹰
Owner 碗海鹰
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