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Catalytic oxidation catalyst for removing chlorine-containing VOCs and preparation method of catalytic oxidation catalyst

A catalytic oxidation and catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the problem of poor thermal stability at high temperature, anti-chlorine poisoning ability and anti-carbon poisoning Insufficient capacity and high activation temperature, achieving the effects of strong carbon poisoning ability, excellent low temperature activity, and strong resistance to Cl poisoning

Active Publication Date: 2022-01-18
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve technical problems such as the high activation temperature of the existing CVOCs catalytic oxidation catalyst, the insufficient ability to resist chlorine poisoning and carbon deposition poisoning, and the poor thermal stability at high temperature. Catalytic oxidation catalyst for organic matter removal and preparation method thereof, has strong catalytic oxidation performance and strong durability for CVOCs, and has high market application prospect

Method used

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  • Catalytic oxidation catalyst for removing chlorine-containing VOCs and preparation method of catalytic oxidation catalyst
  • Catalytic oxidation catalyst for removing chlorine-containing VOCs and preparation method of catalytic oxidation catalyst

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Experimental program
Comparison scheme
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Embodiment 1

[0025] The preparation process of the present embodiment catalytic oxidation catalyst is as follows:

[0026] (1) Preparation of hydroxyapatite carrier

[0027] Dissolve 1312g Ca(NO 3 ) 2 and 712.8g (NH 4 ) 2 HPO 4 , add ammonia water to both solutions to adjust the pH value to 10; under vigorous stirring conditions, (NH 4 ) 2 HPO 4 5% of the solution was added to the Ca(NO 3 ) 2 In the solution, after a small amount of precipitation appears in the solution, the remaining (NH 4 ) 2 HPO 4 All the solution was added, and after the reaction was completed, it was left standing at 40°C for 24 hours; the precipitate was obtained by filtration, washed with water and ethanol, and dried to obtain 799g Ca 10 (PO 4 ) 6 (OH) 2 Hydroxyapatite carrier.

[0028] (2) Ce-Zr-La-PrO x Preparation of Composite Metal Oxide

[0029] Prepare 10L of citric acid aqueous solution of 0.5mol / L, add 67.14g Ce(NO 3 ) 3 ·6H 2 O, 116gZrOCl 2 ·8H 2 O, 155.9g La(NO 3 ) 3 ·6H 2 O and 3...

Embodiment 2

[0035] The preparation process of the present embodiment catalytic oxidation catalyst is as follows:

[0036] (1) Preparation of hydroxyapatite carrier

[0037] Dissolve 1572.1g Mg(NO 3 ) 2 and 839.5g (NH 4 ) 2 HPO 4 , add ammonia water to both solutions to adjust the pH value to 10; under vigorous stirring conditions, (NH 4 ) 2 HPO 4 7% of the solution was added to Mg(NO 3 ) 2 In the solution, after a small amount of precipitation appears in the solution, the remaining (NH 4 ) 2 HPO 4 Add all the solution, and let it stand at 25°C for 12 hours after the reaction; filter to obtain a precipitate, wash with water and ethanol, and dry to obtain 890g of Mg 10 (PO 4 ) 6 (OH) 2 Hydroxyapatite carrier.

[0038] (2) Ce-Zr-La-PrO x Preparation of Composite Metal Oxide

[0039] Prepare 7L of citric acid aqueous solution of 2mol / L, add 37.3g Ce(NO 3 ) 3 ·6H 2 O, 64.45g ZrOCl 2 ·8H 2 O, 86.6g La(NO 3 ) 3 ·6H 2 O and 8.7g Pr(NO 3 ) 3 ·6H 2 O, then add concentra...

Embodiment 3

[0044] The preparation process of the present embodiment catalytic oxidation catalyst is as follows:

[0045] (1) Preparation of hydroxyapatite carrier

[0046] Dissolve 1397.3g Ca(NO 3 ) 2 and 656g (NH 4 ) 2 HPO 4 , add ammonia water to both solutions to adjust the pH value to 10; under vigorous stirring conditions, (NH 4 ) 2 HPO 4 4% of the solution was added to the Ca(NO 3 ) 2 In the solution, after a small amount of precipitation appears in the solution, the remaining (NH 4 ) 2 HPO 4 All the solution was added, and after the reaction was completed, it was left standing at 35°C for 20 hours; the precipitate was obtained by filtration, washed with water and ethanol, and dried to obtain 845g Ca 12 (PO 4 ) 7 (OH) 3 Hydroxyapatite carrier.

[0047] (2) Ce-Zr-La-PrO x Preparation of Composite Metal Oxide

[0048] Prepare 8L of citric acid aqueous solution of 1.6mol / L, add 57.1g Ce(NO 3 ) 3 ·6H 2 O, 98.6gZrOCl 2 ·8H 2 O, 132.5g La(NO 3 ) 3 ·6H 2 O and 16...

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Abstract

The invention provides a catalytic oxidation catalyst for removing chlorine-containing VOCs and a preparation method of the catalytic oxidation catalyst. The catalyst disclosed by the invention is prepared from RuO2, SnO2, Ce-Zr-La-PrOx and hydroxyapatite. The preparation method comprises the following steps: firstly, preparing a hydroxyapatite carrier and a Ce-Zr-La-PrOx composite metal oxide by adopting a coprecipitation method, then adding a precursor solution of Ru and Sn into mixture powder, then adding carboxymethyl cellulose and polyoxyethylene, carrying out grinding by using a ball mill to obtain slurry, and then drying and roasting the slurry to obtain the catalytic oxidation catalyst. The catalyst is high in low-temperature activity and strong in chlorine poisoning resistance and carbon poisoning resistance, and can be used for catalytic oxidation of chlorine-containing volatile organic compound flue gas.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a catalytic oxidation catalyst for removing chlorine-containing volatile organic compounds and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are important air pollutants that endanger human health and destroy the ecological environment. VOCs mainly originate from petrochemical, coating, rubber, printing and other industries. The annual emissions in my country exceed 30 million tons. Common VOCs include alkanes, olefins, halogenated hydrocarbons, alcohols, aldehydes, acids, esters, etc. Among them, chlorinated volatile organic compounds (CVOCs) mainly include chlorinated alkanes, chlorinated olefins, and chlorinated aromatics. and pesticide industries. CVOCs have good chemical and thermal stability, are not easy to decompose, and can stay in nature for a long time. [0003] The elimination of CVOCs generally ado...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J23/46B01J32/00F23G7/07
CPCB01J27/1856B01J23/462B01J23/002F23G7/07B01J2523/00F23G2209/14F23G2209/142B01J2523/3706B01J2523/3712B01J2523/3718B01J2523/43B01J2523/48B01J2523/821
Inventor 张颖
Owner UNIV OF SCI & TECH OF CHINA
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