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Chlorine-containing organic waste gas catalytic combustion catalyst and preparation method thereof

An organic waste gas, catalytic combustion technology, applied in combustion methods, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as catalyst deactivation, and achieve high anti-Cl poisoning ability, strong anti-chlorine poisoning ability, good The effect of thermal stability

Pending Publication Date: 2020-02-14
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst for catalytic combustion of chlorine-containing organic waste gas to solve the problem that existing catalysts are easily deactivated due to Cl poisoning

Method used

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  • Chlorine-containing organic waste gas catalytic combustion catalyst and preparation method thereof
  • Chlorine-containing organic waste gas catalytic combustion catalyst and preparation method thereof
  • Chlorine-containing organic waste gas catalytic combustion catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Mix the chloroplatinic acid solution containing 0.85g of metal platinum with the sodium hydroxide solution, adjust the pH=11, heat and boil for 3 hours, add deionized water to prepare a Pt precursor solution with a Pt concentration of 0.1mol / L; then add the compound Oxide heptaaluminate dodecacalcium carrier 999g, mechanically stirred to fully mix the solid and liquid to obtain a mixed slurry; add dilute nitric acid with a concentration of 0.001mol / L to the mixed slurry to adjust the pH of the system to 3, press filter to remove water, The filter cake was dried at a constant temperature of 150°C for 12 hours, calcined at 500°C for 4 hours in an air atmosphere, and granulated to obtain a catalytic combustion catalyst for chlorine-containing organic waste gas, in which the mass of platinum oxide accounted for 0.1% of the total mass of the catalyst.

Embodiment 2

[0031] Mix the chloroplatinic acid solution containing 1.72g of metallic platinum with sodium hydroxide solution, adjust to pH=12, heat and boil for 5 hours, add deionized water to prepare a Pt precursor solution with a Pt concentration of 0.8mol / L; then add Composite oxide heptaaluminate dodecacalcium carrier 998g, mechanically stirred to fully mix the solid and liquid to obtain a mixed slurry; add dilute nitric acid with a concentration of 0.01mol / L to the mixed slurry, adjust the pH of the system to 3, and press filter to remove water , the filter cake was dried at a constant temperature of 150°C for 12 hours, calcined at 650°C for 4 hours in an air atmosphere, and granulated to obtain a catalytic combustion catalyst for chlorine-containing organic waste gas, in which the mass of platinum oxide accounted for 0.2% of the total mass of the catalyst.

Embodiment 3

[0033] Mix the chloroplatinic acid solution containing 2.57g of metallic platinum with sodium hydroxide solution, adjust to pH = 11.5, heat and boil for 4 hours, add deionized water to prepare a Pt precursor solution with a Pt concentration of 0.4mol / L; then add Composite oxide heptaaluminate dodecacalcium carrier 997g, mechanically stirred to fully mix the solid and liquid to obtain a mixed slurry; add acetic acid to the mixed slurry to adjust the pH of the system to 3.5, press filter to remove water, and dry the filter cake at a constant temperature of 150°C Calcined at 500°C for 6 hours in an air atmosphere for 12 hours, and granulated to obtain a catalyst for the catalytic combustion of chlorine-containing organic waste gas, wherein the mass of platinum oxide accounts for 0.3% of the total mass of the catalyst.

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Abstract

The invention discloses a chlorine-containing organic waste gas catalytic combustion catalyst and a preparation method thereof, belongs to the field of chemical preparation, and solves the problem that a conventional catalyst is easy to inactivate due to Cl poisoning. According to the chlorine-containing organic waste gas catalytic combustion catalyst, a composite oxide dodecacalcium heptaaluminate is used as a carrier, PtO2 is used as a precious metal active center, and the PtO2 accounts for 0.1-0.3% of the total mass of the catalyst. The preparation method comprises the steps: mixing a chloroplatinic acid solution with a sodium hydroxide solution, adjusting the pH value to be greater than or equal to 11, and adding deionized water to prepare a soluble Pt precursor solution; adding a composite oxide dodecacalcium heptaaluminate carrier, and stirring; adding nitric acid or acetic acid, and adjusting the pH value of the system to 3-4; calcining, crushing and granulating in an air atmosphere to obtain the chlorine-containing organic waste gas catalytic combustion catalyst. The catalyst provided by the invention has extremely high Cl poisoning resistance and good heat-resistant stability. According to the method, the problem of PtO2 loading is solved, and the process is simple.

Description

technical field [0001] The invention belongs to the field of chemical preparation, and in particular relates to a catalyst for catalytic combustion of chlorine-containing organic waste gas and a preparation method thereof. Background technique [0002] With the development of modern industry and economy, environmental problems are becoming more and more serious, among which air pollution is very prominent. Volatile organic compounds are one of the main pollutants in the air. Chlorinated volatile organic compounds (CVOCs) are an important branch of volatile organic compounds (VOCs), such as methylene chloride, trichloroethylene, chlorobenzene, polychlorinated dibenzo Dioxins, etc., generally have high toxicity, carcinogenicity and teratogenicity, and are a class of compounds that seriously threaten human and biological health and destroy the natural ecological environment. [0003] The vast majority of chlorine-containing volatile organic compounds are highly volatile, have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/58F23G7/07
CPCB01J23/58B01J23/002F23G7/07F23G2209/14F23G2209/142
Inventor 张静刘国旗白延利曹笃盟马骞任志勇王红梅李欢郅欢欢孟俊杰何艳
Owner JINCHUAN GROUP LIMITED
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