High-stability catalyst for low-temperature catalytic combustion of chlorine-containing volatile organic compounds and preparation method of high-stability catalyst

A technology of volatile organic compounds and low-temperature catalysis, which is applied in the field of air pollution control, can solve the problems of various types of intermediate toxic by-products and complex reaction processes, and achieve low cost, easy-to-obtain raw materials and good results

Active Publication Date: 2021-06-15
SHANGHAI PROFOUND ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of catalytic combustion of chlorinated volatile organic compounds, the reaction process is complex and there are many kinds of intermediate toxic by-products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this embodiment, a method for preparing a highly stable catalyst for catalytic combustion of chlorine-containing volatile organic compounds at low temperature comprises the following steps:

[0033] Weigh 10 mmol of ammonium niobium oxalate and dissolve it in 60 ml of deionized water, and adjust the pH to 10 with ammonia water. After stirring for 30 min, it was transferred to a 100 ml Teflon-lined stainless steel hydrothermal autoclave, and reacted at 180° C. for 24 hours. After cooling down, suction filtration, deionized water washing, drying and grinding are carried out successively to obtain niobium-containing powder.

[0034] Weigh 2 mmol of cerium nitrate and 0.1 mmol of chromium nitrate, and fully dissolve them in 50 ml of deionized water. Stir and add ammonia water dropwise until no precipitation occurs, then add 1.5 g of niobium-containing powder therein. After stirring for 30 minutes, transfer to a 100ml Teflon-lined stainless steel hydrothermal autoclave,...

Embodiment 2

[0039] This embodiment is basically the same as Embodiment 1, and the special features are:

[0040] In this embodiment, a method for preparing a highly stable catalyst capable of catalytic combustion of chlorine-containing volatile organic compounds at low temperature comprises the following steps:

[0041] Weigh 10 mmol of niobium chloride and dissolve it in 60 ml of deionized water, and adjust the pH to 10 with ammonia water. After stirring for 30 min, it was transferred to a 100 ml Teflon-lined stainless steel hydrothermal autoclave, and reacted at 180° C. for 24 hours. After cooling down, suction filtration, deionized water washing, drying and grinding are carried out successively to obtain niobium-containing powder.

[0042] Weigh 2 mmol of cerium nitrate and 0.1 mmol of chromium nitrate, and fully dissolve them in 50 ml of deionized water. Stir and add ammonia water dropwise until no precipitation occurs, then add 1.5 g of niobium-containing powder therein. After sti...

Embodiment 3

[0047] This embodiment is basically the same as the previous embodiment, and the special features are:

[0048] In this embodiment, a method for preparing a highly stable catalyst capable of catalytic combustion of chlorine-containing volatile organic compounds at low temperature comprises the following steps:

[0049] Weigh 10 mmol of ammonium niobium oxalate and dissolve it in 60 ml of absolute ethanol, and adjust the pH to 10 with ammonia water. After stirring for 30 min, it was transferred to a 100 ml Teflon-lined stainless steel hydrothermal autoclave, and reacted at 180° C. for 24 hours. After cooling down, suction filtration, deionized water washing, drying and grinding are carried out successively to obtain niobium-containing powder.

[0050] Weigh 2 mmol of cerium nitrate and 0.1 mmol of chromium nitrate, and fully dissolve them in 50 ml of deionized water. Stir and add ammonia water dropwise until no precipitation occurs, then add 1.5 g of niobium-containing powder...

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PUM

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Abstract

The invention discloses a high-stability catalyst for low-temperature catalytic combustion of chlorine-containing volatile organic compounds and a preparation method of the high-stability catalyst. The method can be used for preparing a composite transition metal oxide catalyst with good low-temperature activity and chlorine poisoning resistance, and belongs to the field of air pollution control. According to the method, transition metal elements niobium, cerium and chromium are adopted as catalytic components, and the oxidation-reduction capacity and the electronic structure of the catalyst are adjusted through the processes of coprecipitation, hydrothermal treatment, atmosphere heat treatment and the like. The catalytic properties of the active components of the prepared composite metal catalyst are correspondingly changed due to the change of the electronic structure, and the catalyst has high tolerance to chlorine species in the reaction process, has an excellent degradation effect on industrial chlorobenzene, and can be widely applied to treatment of other chlorine-containing volatile organic compounds.

Description

technical field [0001] The invention belongs to the field of air pollution control, in particular to a highly stable catalyst for low-temperature catalytic combustion of chlorine-containing volatile organic compounds and a preparation method thereof. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) are the most common air pollutants, which seriously threaten human health and environmental safety. VOCs refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point below 260°C at normal pressure. . Generally speaking, VOCs in the atmosphere come from a wide range of sources, mainly from motor vehicle exhaust and industrial emissions including petrochemical, pharmaceutical, and waste incineration. Among them, chlorine-containing volatile organic compounds, as a common type of VOCs in industrial production, have the "three causes" of carcinogenicity, teratogenicity, and mutagenic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/26F23G7/07
CPCB01J23/002B01J23/26F23G7/07B01J2523/00F23G2209/14B01J2523/3712B01J2523/56B01J2523/67Y02A50/20Y02E20/34
Inventor 刘逊张竞宜杨春贤刘迎晋刚周倩倩柴维军顾悦刘芳芳
Owner SHANGHAI PROFOUND ENVIRONMENTAL TECH CO LTD
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