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Manganese-cerium solid solution supported cobalt catalyst for ozone synergistic catalytic oxidation of volatile organic compounds and preparation method and application thereof

A manganese-cerium solid solution, synergistic catalysis technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. Effects of pollution problems

Active Publication Date: 2020-10-16
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the ozone pollution problem existing in current air purification products and the difficult mineralization problem of VOCs under normal temperature, the object of the present invention is to provide a kind of manganese that synergistically catalyzes and oxidizes VOCs with ozone Cerium solid solution supports cobalt catalyst, so that it can be used in current air purification products to solve the problem of ozone pollution and improve the mineralization rate of VOCs at room temperature

Method used

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  • Manganese-cerium solid solution supported cobalt catalyst for ozone synergistic catalytic oxidation of volatile organic compounds and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A manganese-cerium solid solution-supported cobalt catalyst for ozone synergistically catalyzing the oxidation of VOCs. The catalyst is cerium-manganese solid solution-supported tricobalt tetroxide. 3 o 4 The loading capacity is 30%-50%, and it is prepared by redox co-precipitation-co-precipitation method, and is prepared according to the following steps:

[0015] 1) Dissolve 1.42g of potassium permanganate, 4.83g of 50% manganese nitrate solution and 1.09g of cerium nitrate hexahydrate in 200ml of deionized water, stir well, and add 0.10mol dropwise in a water bath at 40°C / L of sodium hydroxide to about pH=11 to obtain precipitation;

[0016] 2) The obtained precipitate was stirred at room temperature for 4 hours, aged overnight, filtered, washed with deionized water, and dried overnight at 60°C to obtain a precursor;

[0017] 3) Grinding the obtained precursor and calcining in air at 500°C for 4 hours to obtain a manganese-cerium solid solution;

[0018] 4) Weigh ...

Embodiment 2

[0022] A manganese cerium solid solution supported cobalt catalyst for ozone synergistic catalytic oxidation of VOCs, similar to Example 1, prepared according to the following steps:

[0023] 1) Dissolve 1.42g of potassium permanganate, 4.83g of 50% manganese nitrate solution and 1.09g of cerium nitrate hexahydrate in 200ml of deionized water, stir well, and add 0.10mol / L of sodium hydroxide to about pH=11, to obtain precipitation;

[0024] 2) The obtained precipitate was stirred at room temperature for 4 hours, aged overnight, filtered, washed with deionized water, and dried overnight at 60°C to obtain a precursor;

[0025] 3) Grinding the obtained precursor and calcining in air at 500°C for 4 hours to obtain a manganese-cerium solid solution;

[0026] 4) Weigh 1.5g of the prepared manganese-cerium solid solution and disperse it in 200ml of deionized water, add 2.73g of cobalt nitrate hexahydrate to it, stir for 1 hour to make it evenly dispersed, and then add ammonia water...

Embodiment 3

[0030] A manganese cerium solid solution supported cobalt catalyst for ozone synergistic catalytic oxidation of VOCs, similar to Example 1, prepared according to the following steps:

[0031] 1) Dissolve 1.31g of potassium permanganate, 4.47g of 50% manganese nitrate solution and 1.81g of cerium nitrate hexahydrate in 200ml of deionized water, stir well, and add 0.10mol dropwise in a water bath at 40°C / L of sodium hydroxide to about pH=11 to obtain precipitation;

[0032] 2) The obtained precipitate was stirred at room temperature for 4 hours, aged overnight, filtered, washed with deionized water, and dried overnight at 60°C to obtain a precursor;

[0033] 3) Grinding the obtained precursor and calcining in air at 500°C for 4 hours to obtain a manganese-cerium solid solution;

[0034] 4) Weigh 1.5g of the prepared manganese-cerium solid solution and disperse it in 200ml of deionized water, add 1.65g of cobalt nitrate hexahydrate to it, stir for 1 hour to make it evenly dispe...

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Abstract

The invention discloses a manganese-cerium solid solution supported cobalt catalyst for ozone synergistic catalytic oxidation of VOCs and a preparation method and application of the manganese-cerium solid solution supported cobalt catalyst. The catalyst is cerium-manganese solid solution loaded cobaltosic oxide, the molar ratio of manganese to cerium is 9: 1-5: 1, the loading capacity of Co3O4 is30%-50% based on the mass of a manganese-cerium solid solution, and the catalyst is prepared by adopting a redox coprecipitation-coprecipitation combined method. According to the prepared catalyst, ozone generated in the processes of dust removal, odor removal, sterilization and the like in an air purification product can be effectively utilized, and degradation of VOCs at the normal temperature is promoted. The invention provides a bifunctional catalyst integrating ozone elimination and normal-temperature VOCs catalytic oxidation.

Description

technical field [0001] The invention belongs to the technical field of catalysis and environmental protection, and in particular relates to a manganese-cerium solid solution-loaded cobalt catalyst for ozone synergistic catalytic oxidation of VOCs, and a preparation method and application thereof. Background technique [0002] With the improvement of human material civilization, environmental problems have become increasingly prominent, and indoor environmental problems have attracted more and more people's attention. Among them, particulate matter, formaldehyde, and VOCs are the main indoor pollutants. Particulate matter is one of the important pollutants in indoor air, and it is also an important indicator for evaluating indoor air quality. The current air purification products have corresponding removal indicators for the removal of particulate matter, mainly using high-efficiency filtration, electrostatic dust removal and other technologies. Formaldehyde is one of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/03B01J37/08
CPCB01J23/8892B01J23/002B01J37/031B01J37/082B01D53/8687B01D2257/708B01D2258/06B01D2251/104B01J2523/00B01J2523/3712B01J2523/72B01J2523/845Y02A50/20
Inventor 崔大祥蔡婷袁静赵昆峰童琴金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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