Nanometer rare earth catalyzed ozonation method for normal temperature digestion of volatile organic matters

A volatile organic compound and nano rare earth technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problems of poor structural stability, limited application range, high energy consumption, and achieve low cost, The equipment and operation are safe and simple, and the effect of low energy consumption

Inactive Publication Date: 2016-11-30
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Nanometer rare earth catalyzed ozonation method for normal temperature digestion of volatile organic matters
  • Nanometer rare earth catalyzed ozonation method for normal temperature digestion of volatile organic matters
  • Nanometer rare earth catalyzed ozonation method for normal temperature digestion of volatile organic matters

Examples

Experimental program
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Effect test

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 550℃ 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 CuCl 2 The mixed halogen salt solution that solution is mixed into is stirred to make it mix evenly, and the mol ratio of the manganese ion and the copper ion in the described mixed halogen salt solution is 2:1;

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

Embodiment 2

[0054] (1) prepare target catalyst, specific process is as follows:

[0055] (a) Use the activated spherical nano-attapulgite as the catalyst carrier, impregnate the catalyst carrier in the nitrate solution adding nano-scale lanthanum, then dry and roast, and cover the nano-rare earth oxide auxiliary agent on the surface of the catalyst carrier, the drying temperature is 200 ℃, the calcination temperature is 350℃ and lasts for 2h;

[0056] (b) The catalyst carrier whose surface has been covered with nano-rare earth oxide promoter is added by CrCl 3 solution and CuCl 2 The mixed halogen salt solution that solution is mixed into is stirred to make it mix evenly, and the mol ratio of the chromium ion and the copper ion in the described mixed halogen salt solution is 2:1;

[0057] (c) Then add sodium hydroxide solution to the transition metal 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 th...

Embodiment 3

[0068] (1) prepare target catalyst, specific process is as follows:

[0069] (a) Use the activated spherical nano-attapulgite as the catalyst carrier, impregnate the catalyst carrier in the nitrate solution adding nano-scale erbium, then dry and roast, cover the surface of the catalyst carrier with nano-rare earth oxide additives, and the drying temperature is 150 °C , the calcination temperature is 350°C and lasts for 2h;

[0070] (b) The catalyst carrier whose surface has been covered with nano-rare earth oxide promoter is added by MnCl 3 solution and CrCl 2 The mixed halogen salt solution that solution is mixed into is stirred to make it mix evenly, and the mol ratio of the manganese ion and the chromium ion in the described mixed halogen salt solution is 2:1;

[0071] (c) Then add sodium hydroxide solution to the mixed halogen salt solution of transition metals, adjust the pH value of the solution to 7, let stand at room temperature for 8 hours, filter and wash until the...

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Abstract

The invention discloses a nanometer rare earth catalyzed ozonation method for normal temperature digestion of volatile organic matters. The nanometer rare earth catalyzed ozonation method comprises: (1) loading a nanometer rare earth element coating adopted as an auxiliary agent on a catalyst carrier, coating nanometer spinel adopted as the active component of the catalyst on the obtained carrier, and finally calcining the catalyst carrier loading the auxiliary agent and the active component to form a large number of micro-pores on the surface and in the internal of the catalyst carrier so as to obtain a target catalyst with pores; and (2) fixing the prepared target catalyst on the catalytic bed layer of a catalytic oxidation tower, starting an ozone generator, introducing volatile organic matters into the catalytic oxidation tower, and carrying out deep oxidation on the volatile organic matters into non-toxic and odorless substances at a room temperature of -10-40 DEG C, wherein the volatile organic matters are pre-treated and acid gas, alkali gas and other dust and particles are removed from the volatile organic matters before the volatile organic matters are introduced into the catalytic oxidation tower. According to the present invention, with the method, the VOCs can be completely oxidized at the room temperature to produce carbon dioxide and water, such that the operation is safe, and the energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a preparation method of a porous nanometer rare earth catalytic ozonation 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), halocarbons ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/72B01D53/70B01D53/75B01D53/78B01D47/06B01J23/889B01J23/86B01J23/34
CPCB01D47/06B01D53/40B01D53/42B01D53/75B01D53/78B01D53/8662B01D53/8668B01D2251/104B01D2255/206B01D2255/2063B01D2255/2065B01D2255/2066B01D2255/2068B01D2255/2073B01D2255/20746B01D2255/20761B01D2255/20784B01D2257/70B01D2257/7022B01D2257/7027B01D2257/708B01J23/005B01J23/34B01J23/868B01J23/8892B01J37/0228Y02P70/10
Inventor 丁辉
Owner TIANJIN UNIV
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