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VOCs normal temperature degradation high efficiency catalyst, and preparation method and applications thereof

A catalyst, room temperature technology, used in heterogeneous catalyst chemical elements, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the performance needs to be further improved, and achieve high VOCs removal. In addition to activity, high selectivity, mild use conditions

Active Publication Date: 2019-01-22
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the presence of ozone, the catalyst can remove up to 74% of organic matter, and the performance of the catalyst needs to be further improved

Method used

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  • VOCs normal temperature degradation high efficiency catalyst, and preparation method and applications thereof
  • VOCs normal temperature degradation high efficiency catalyst, and preparation method and applications thereof
  • VOCs normal temperature degradation high efficiency catalyst, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of VOCs normal temperature degradation high-efficiency catalyst, comprising the following steps:

[0031] (1) Weigh silica sol, aluminum sol, tetrapropylammonium bromide, hexadecyltrimethylammonium bromide, and ammonia water in a molar ratio of 20:1:3:3:10 to weigh the corresponding reagents, and the silica sol , aluminum sol, tetrapropylammonium bromide, and cetyltrimethylammonium bromide were dissolved in water, and mixed uniformly to obtain solution A; ammonia water was dissolved in water to obtain solution B; after mixing solution A and solution B Transferred to a ball mill jar, ball milled for 18 hours, centrifuged at 3000 r / min, dried at 100°C for 12 hours, and calcined at 550°C for 6 hours to obtain a carrier.

[0032] (2) Add the manganese salt solution to the carrier prepared in step (1), stir for 2h, the stirring speed is 360r / min, the MnO in the manganese salt 2 Elements accounted for SiO 2 -Al 2 o 3 The mass ratio is 5%; weigh a cert...

Embodiment 2

[0039] A preparation method of VOCs normal temperature degradation high-efficiency catalyst, comprising the following steps:

[0040] (1) Weigh silica sol, aluminum sol, tetrapropylammonium bromide, polyoxyethylene-polyoxypropylene-polyoxyethylene co-embedded polymer, and sodium hydroxide at a molar ratio of 400:1:10:10:40 Take the corresponding reagent, dissolve silica sol, aluminum sol, tetrapropylammonium bromide, polyoxyethylene-polyoxypropylene-polyoxyethylene co-embedded polymer in water, and mix well to obtain solution A; dissolve sodium hydroxide in water to obtain solution B; mix solution A and solution B, transfer to a ball mill jar, mill for 36 hours, centrifuge at 4000 r / min, dry at 100°C for 12 hours, and roast at 550°C for 6 hours to obtain a carrier.

[0041] (2) Add the manganese salt solution to the carrier prepared in step (1), stir for 6h, the stirring speed is 120r / min, MnO 2 Elements accounted for SiO 2 -Al 2 o 3 The mass ratio is 35%; weigh a certain ...

Embodiment 3

[0048] A preparation method of VOCs normal temperature degradation high-efficiency catalyst, comprising the following steps:

[0049](1) Silica sol, aluminum sol, tetrapropylammonium bromide, cetyltrimethylammonium bromide, polyoxyethylene-polyoxypropylene-polyoxyethylene co-embedded polymer, and potassium hydroxide are mixed in molar ratio Weigh the corresponding reagents at 300:1:5:5:5:30, mix silica sol, aluminum sol, hexadecyltrimethylammonium bromide, polyoxyethylene-polyoxypropylene-polyoxyethylene co-embedded polymer Dissolve in water and mix well to obtain solution A; dissolve potassium hydroxide in water to obtain solution B; mix solution A and solution B and transfer to a ball mill tank, ball mill for 24 hours, centrifuge at a speed of 2000r / min, and place at 100 °C for 12 hours, and then calcined at 550 °C for 6 hours to obtain a carrier.

[0050] (2) Add the manganese salt solution to the carrier prepared in step (1), stir for 4h, the stirring speed is 240r / min, M...

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Abstract

The invention relates to a VOCs normal temperature degradation high efficiency catalyst, and a preparation method and applications thereof. According to the preparation method, a silicon aluminum composite oxide with a plurality of porous structures is taken as a carrier; active component MnO2 is dispersed on the surface of the porous silicon aluminum composite oxide carrier at a high dispersion degree, and MnO2 surface is loaded with a metal oxide auxiliary agent. Compared with the prior art, the advantages are that: the silicon aluminum composite oxide carrier possesses a plurality of porousstructures, effective absorption of VOCs molecules of different kinds and different sizes can be realized; highly dispersed active component MnO2 is capable of catalyzing ozone oxidation of VOCs molecules absorbed in pores and channels of the carrier, and the synergistic effect of the metal oxide auxiliary agent with the active component MnO2 is capable of promoting VOCs deep degradation into CO2and H2O, generation of by-product is reduced, effective degradation of residue ozone is realized at the same time, secondary pollution is avoided, at normal temperature, high VOCs desorption activityand high CO2 selectivity are achieved, no secondary pollution is caused, service life is long, the preparation method is simple, cost is low, the using conditions are mild, and potential industrial application value is achieved.

Description

technical field [0001] The invention relates to the technical field of exhaust gas treatment, in particular to a high-efficiency catalyst for VOCs degradation at room temperature and its preparation and application. Background technique [0002] Volatile organic compounds (VOCs for short) are a type of pollutants that are ubiquitous in indoor and outdoor air and have a complex composition. The sources of VOCs pollution in the atmospheric environment are mainly divided into living sources, industrial sources, and traffic sources. Halogenated hydrocarbons, polycyclic aromatic hydrocarbons, alcohols, lipids, ketones, etc. Most VOCs have photochemical reactivity. Under the irradiation of ultraviolet light, they react with NO to form secondary pollutants, increase the surface concentration of smog and ozone, and cause harm to the ecological environment. Most VOCs are toxic and odorous, and have carcinogenic effects on human health. Sexuality, teratogenicity, mutagenicity, may ca...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J23/889B01D53/62B01D53/86B01D53/72
CPCB01D53/62B01D53/864B01D2257/504B01D2257/7027B01J23/002B01J23/34B01J23/8892B01J2523/00B01J2523/842B01J2523/72B01J2523/41B01J2523/31B01J2523/17B01J2523/3712B01J2523/3706B01J2523/3718B01J2523/847Y02A50/20
Inventor 黄金花叶丽萍杨丙星张磊夏克
Owner SHANGHAI RES INST OF CHEM IND
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