Preparation method of catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature

A volatile organic compound and catalyst technology, which is applied in the field of preparation of porous nano-rare earth catalytic ozonation and decomposition catalysts, can solve the problems of poor structural stability, limited application range and high energy consumption, and achieves low cost, safe and simple equipment and operation, The effect of low energy consumption

Inactive Publication Date: 2016-12-21
TIANJIN UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patents all use precious metals as active components. The prepared catalysts are highly effective in removing chlorine from common pollutants that do not contain chlorine. However, the application range is limited and it is easy to deactivate. The catalytic combustion process of VOCs generally needs to be heated to above 200 °C , the energy consumption is relatively high, and there are disadvantages such as poor structural stability due to the use of ceramics as the carrier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature
  • Preparation method of catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature
  • Preparation method of catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the catalyst that catalyzes the ozonation decomposition of volatile organic matter under the normal temperature that the present invention proposes, it comprises the following steps:

[0027] (1) First, the nano-rare earth oxide coating as an auxiliary agent is loaded on the catalyst carrier, and then the active component nano-perovskite as a catalyst is coated on the carrier of the rare earth oxide, and finally the loading auxiliary agent and active The catalyst carrier of the component is calcined to form a large number of micropores on the surface and inside of the catalyst carrier to obtain the target catalyst with holes;

[0028] (2) fix the target catalyst made on the catalytic bed of the catalytic oxidation tower 2, start the ozone generator 4, then pass through the pretreatment in the catalytic oxidation tower, remove contained acidic, alkaline gas and other dust And particulate volatile organic compound waste gas VOCs, no additional he...

Embodiment 1

[0042] (1) prepare target catalyst, specific process is as follows:

[0043] (a) Use the activated spherical nano-attapulgite as the catalyst carrier, impregnate the catalyst carrier in the nitrate solution adding nano-scale cerium, then dry and roast, cover the nano-rare earth oxide additive on the surface of the catalyst carrier, and the drying temperature is 100 ℃, the calcination temperature is 500℃ and lasts for 0.5h;

[0044] (b) The catalyst carrier whose surface has been covered with nano-rare earth oxide promoter is added by MnCl 3 solution and LaCl 3 The mixed halogen salt solution that solution is mixed into, stirs it to mix evenly, and the mol ratio of the manganese ion and the lanthanum ion in the described mixed halogen salt solution is 1:1;

[0045] (c) Then add sodium hydroxide solution to the mixed halogen salt solution, adjust the pH value of the solution to 7, let stand at room temperature for 6 hours, filter and wash until the washing liquid is tested to ...

Embodiment 2

[0056] (1) prepare target catalyst, specific process is as follows:

[0057] (a) Use the activated spherical nano-attapulgite as the catalyst carrier, impregnate the catalyst carrier in the nitrate solution adding nano-scale praseodymium, then dry and roast, cover the nano-rare earth oxide additive on the surface of the catalyst carrier, and the drying temperature is 200 ℃, the calcination temperature is 350℃ and lasts for 2h;

[0058] (b) The catalyst support whose surface has been covered with nano-rare earth oxide promoter is added by CoCl 3 solution and LaCl 3 The mixed halogen salt solution that solution is mixed into, stirs it to mix evenly, and the molar ratio of the cobalt ion and the lanthanum ion in the described mixed halogen salt solution is 1:1;

[0059] (c) Then add sodium hydroxide solution to the mixed halogen salt solution, adjust the pH value of the solution to 7, let stand at room temperature for 8 hours, filter and wash until the washing liquid is tested ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a catalyst for catalyzing ozonization and decomposition volatile organic compounds (VOCs) at normal temperature. The preparation method comprises the following steps: (1) loading nano rare earth oxide coating serving as an auxiliary agent on a catalyst carrier, coating an active component, namely nano perovskite, on the carrier, on which the rare earth oxide is loaded, calcining the catalyst carrier, on which the auxiliary agent and the active component are loaded, and forming a large amount of micropores in the surface of and inside the catalyst carrier to obtain a target catalyst with pores; and (2) fixing the prepared target catalyst on a catalytic bed layer of a catalytic oxidation tower, starting an ozone generator, introducing VOC waste gas subjected to pretreatment in the catalytic oxidation tower, and performing deep oxidation on the VOCs at normal temperature of -10 to 40 DEG C to generate non-toxic and odorless substances. By the method, the VOCs can be completely oxidized at room temperature to generate carbon dioxide and water, so the method is safe in operation and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of exhaust gas treatment, and in particular relates to a preparation method of a porous nano-rare earth catalytic ozonation decomposition catalyst for efficiently degrading volatile organic compounds (VOCs) at normal temperature (-10 to 40°C). Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds), referred to as VOCs, refers to the general term for organic compounds with a boiling point between 50-260°C at normal pressure and a saturated vapor pressure greater than 133.32Pa at normal temperature. VOCs mainly come from waste gas emitted by industries such as petrochemical industry, pharmaceutical industry, printing industry, paint decoration industry, surface anticorrosion and automobile exhaust. According to different chemical structures, VOCs can be divided into eight categories: aliphatic hydrocarbons (butane, gasoline, etc.), aromatic compounds (benzene, toluene, xylene), h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/83B01J23/26B01D53/86B01D53/44B01D53/66
CPCB01D53/8675B01D53/8681B01D53/8684B01D53/8687B01D2257/106B01D2257/708B01J23/002B01J23/26B01J23/34B01J23/83B01J2523/00B01J2523/23B01J2523/3706B01J2523/3712B01J2523/47B01J2523/72B01J2523/3718B01J2523/845B01J2523/17B01J2523/3737B01J2523/3743B01J2523/67Y02A50/20
Inventor 丁辉
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap