High-efficiency moisture-proof ozonolysis catalyst and preparation method thereof

An ozone decomposition and catalyst technology, which is applied in separation methods, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Moisture, ensure catalytic activity and moisture resistance, improve the effect of catalytic activity

Active Publication Date: 2017-06-13
ACAD OF ENVIRONMENTAL PLANNING & DESIGN GRP CO LTD NANJING UNIV
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  • Abstract
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Problems solved by technology

[0010] One of the purposes of the present invention is to provide a high-efficiency moisture-resistant ozone decomposition catalyst in order to overcome the sho...

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  • High-efficiency moisture-proof ozonolysis catalyst and preparation method thereof

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[0034] However, the preparation process of existing ozone decomposition catalysts is complicated, the cost is high, and the decomposition efficiency is relatively low, especially sensitive to ambient humidity, and its decomposition efficiency is greatly affected by ambient humidity, thereby limiting the wide application of ozone decomposition catalysts. It is also a technical problem that researchers urgently want to solve in the research process. In view of the above-mentioned problems existing in existing ozonolysis catalysts, the inventor finally obtained the technical solution of the present invention through a large number of long-term experimental researches. A kind of preparation method of high-efficiency moisture resistance ozonolysis catalyst of the present invention comprises the following steps:

[0035] (1) The molar ratio of manganese nitrate tetrahydrate, copper nitrate trihydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate is (30~80):(10~50):(5~20...

Embodiment 1

[0044] This embodiment provides a high-efficiency moisture-resistant ozonolysis catalyst, which is prepared through the following steps:

[0045] Dissolve manganese nitrate tetrahydrate, copper nitrate trihydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate in deionized water, and stir evenly to obtain a nitrate solution, wherein the concentrations of manganese nitrate, copper nitrate, nickel nitrate and cobalt nitrate are respectively 0.5 mol L -1 , 0.25mol·L -1 , 0.15mol·L -1 and 0.1mol L -1 . Dissolve citric acid and cetyltrimethylammonium hydroxide in deionized water sequentially to obtain a microscopic morphology adjustment solution, in which the concentration of citric acid is 2mol L -1 , the concentration of cetyltrimethylammonium hydroxide is 0.05mol L -1 . Slowly mix equal volumes of the above nitrate solution and micromorphology adjustment solution and then stir at a constant temperature of 55°C; add ammonia water dropwise to adjust the pH of the ...

Embodiment 2

[0047] This embodiment provides a high-efficiency moisture-resistant ozonolysis catalyst loaded with granular activated carbon, which is prepared by the following steps:

[0048] Dissolve manganese nitrate tetrahydrate, copper nitrate trihydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate in deionized water, and stir evenly to obtain a nitrate solution, wherein the concentrations of manganese nitrate, copper nitrate, nickel nitrate and cobalt nitrate are respectively 0.5 mol L -1 , 0.25mol·L -1 , 0.15mol·L -1 and 0.1mol L -1 . Dissolve citric acid and cetyltrimethylammonium hydroxide in deionized water sequentially to obtain a microscopic morphology adjustment solution, in which the concentration of citric acid is 2mol L -1 , the concentration of cetyltrimethylammonium hydroxide is 0.05mol L -1 . Slowly mix the above nitrate solution and the microscopic morphology adjustment solution in equal volumes and then stir at a constant temperature of 55°C; add amm...

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Abstract

The invention discloses a high-efficiency moisture-proof ozonolysis catalyst and a preparation method thereof, belonging to the technical field of ozone purification catalysts. According to the high-efficiency moisture-proof ozonolysis catalyst disclosed by the invention, the oxides of manganese, copper, nickel and cobalt are taken as active components; the preparation method of the high-efficiency moisture-proof ozonolysis catalyst is a sol-gel method; in the preparation process, manganese nitrate tetrahydrate, copper nitrate trihydrate, nickel nitrate hexahydrate and cobalt nitrate hexahydrate are dissolved in deionized water to obtain a nitrate solution; the nitrate solution is slowly added in a mixed solution of citric acid and a cationic surface active agent; after the pH value of the mixed solution is adjusted with ammonium hydroxide, constant temperature stirring is performed to obtain gel; and after the gel is dried, calcination is performed to obtain the ozonolysis catalyst. The preparation method disclosed by the invention is simple and low in costs, solves the problem that the ozonolysis catalyst is relatively poor in moisture-proof performance, and meanwhile, improves the ozonolysis efficiency; and the ozonolysis catalyst is long in service life, and the ozonolysis efficiency is not lowered when the ozonolysis catalyst is continuously used for a month.

Description

technical field [0001] The invention belongs to the technical field of ozone purification catalysts, and more specifically relates to a high-efficiency moisture-resistant ozone decomposition catalyst and a preparation method thereof. Background technique [0002] Ozone in the near-surface atmospheric environment is mainly a secondary pollutant produced by volatile organic compounds and nitrogen oxides under light. Refer to the "2015 China Environmental Status Bulletin" issued by the Ministry of Environmental Protection of the People's Republic of China. In 2015, the degree of ozone pollution in industrially developed areas such as Beijing, Shanghai, Jiangsu, Zhejiang, Hebei, and Liaoning increased significantly compared with 2014, and the ozone in many areas was evaluated on an annual basis. Calculated according to regulations, the concentration obviously exceeds the limit of 160 micrograms per cubic meter stipulated in the "Ambient Air Quality Standard". In addition, in da...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01D53/86B01D53/66
CPCB01D53/8675B01J23/002B01J23/8892B01J2523/00B01J2523/72B01J2523/845B01J2523/847B01J2523/17Y02A50/20
Inventor 焦涛张纪文陆朝阳徐遵主孙永嘉
Owner ACAD OF ENVIRONMENTAL PLANNING & DESIGN GRP CO LTD NANJING UNIV
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