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Adsorption-low-temperature thermal catalyst for removing volatile organic compounds

A volatile organic and catalyst technology, applied in the field of VOCs treatment, can solve the problems such as the decline of catalytic performance and the application limitation of powder catalysts, and achieve the effect of easy production and application, flexible adjustment of particle size, and acceptable particle size.

Inactive Publication Date: 2019-06-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the application of powder catalysts has been greatly limited
In the prior art, there is a problem that the catalytic performance of the diatomite-Mn catalyst is obviously reduced after it becomes spherical

Method used

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  • Adsorption-low-temperature thermal catalyst for removing volatile organic compounds
  • Adsorption-low-temperature thermal catalyst for removing volatile organic compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0023] (1) Catalyst matrix powder (Dt / Mn 2 Ce 1 ) preparation

[0024] Dissolve 52.0g of cerium nitrate hexahydrate and 37.9g ​​of potassium permanganate in 1000mL of water and stir for 20min; adjust the pH to 2 with 37% hydrochloric acid; stir for 20min; add 360g of diatomaceous earth powder and react at room temperature for 2h.

[0025] The mixed solution was transferred to a 1500mL airtight reactor, heated to 100°C, and reacted for 12h. After cooling to room temperature, take it out, rinse with pure water and ethanol 2-3 times after filtration, and dry at 80°C for 6 hours. Then calcined at 350°C for 4h, the material was cooled and ground to obtain the target sample Dt / Mn 2 Ce 1 powder.

[0026] (2) Catalyst particles (Dt / Mn 2 Ce 1 -S) Preparation:

[0027] 84g Dt / Mn 2 Ce 1 , After mixing 3g starch, 5g calcium carbonate, 5g magnesium carbonate, 3g sodium silicate and 25mL pure water, granulate with a pellet machine. Dry at 80°C for 5h, calcinate at 900°C for 1h, a...

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Abstract

The invention discloses an adsorption-low-temperature thermal catalyst for removing volatile organic compounds. A method includes: using cerium nitrate, potassium permanganate and diatomite to prepareDt / Mn2Ce1 powder through a hydrothermal synthesis method in an acidic condition, and performing granulating, drying and calcining to obtain catalyst spherical particles capable of adsorbing and catalytically degrading methylbenzene VOCs. In a catalytic material prepared by the method, diatomite has high VOCs adsorptivity and is combined with Mn-Ce to provide catalytic active sites, and in-situ adsorption-catalytic oxidation is realized; so that the catalytic material shows efficient methylbenzene degradability, 90% degradation temperature is lowered to 300 DEG C, and 100% degradation temperature is lowered to 340 DEG C.

Description

technical field [0001] The invention is an adsorption-low temperature thermal catalyst for removing volatile organic pollutants, which belongs to the field of VOCs treatment. Background technique [0002] In recent years, environmental pollution, especially air pollution, has seriously affected human health. There are a large number of volatile organic pollutants (VOCs) in the atmosphere, such as benzene, toluene, formaldehyde, acetone, dichloroethane, etc., which participate in photochemical reactions in the atmosphere to form particulate pollutants, which eventually cause regional or global climate change. environmental issue. Among them, toluene accounts for the largest proportion of VOCs. [0003] Adsorption is the most widely used and most mature traditional VOCs purification method, while thermocatalysis is currently the most widely used emerging VOCs treatment technology. [0004] The thermal catalytic method is to promote the combustion reaction under certain cond...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/02B01J27/04B01D53/72
CPCY02A50/20
Inventor 胡朝霞吕鸿定陈守文朱鹏飞郭奕彤姚怡媛
Owner NANJING UNIV OF SCI & TECH
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