Catalyst capable of removing N2O, NO and NO2 simultaneously and preparation method

A combined removal and catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of lack of equipment, increase operating costs, and affect the safe operation of the system and other problems, to achieve the effects of saving economic costs, simplifying transformation, and excellent denitrification performance

Inactive Publication Date: 2017-02-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Exhaust gas from nitric acid industry, adipic acid industry, etc. contains a large amount of N 2 O, NO and NO 2 , in the traditional removal technology, it needs to be removed separately in stages, which not only affects the safe operation of the system, but also greatly increases the operating cost
Chinese patent application number CN201310424160.4 disc...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 12.9g of ammonium metavanadate and 58g of ammonium metatungstate, dissolve them in 215mL of deionized water respectively, and prepare each into a salt solution, and add an appropriate amount of ethanolamine to accelerate the dissolution of ammonium metavanadate. The prepared salt solution was sequentially added to 430 g of titanium dioxide carrier by equal-volume impregnation method, and mixed and stirred in a mixer to obtain catalyst paste 1 .

[0024] (2) 1359g of cobalt nitrate hexahydrate is dissolved in 3400g of deionized water, and a clear solution is obtained under stirring conditions, and another 453g of nickel nitrate hexahydrate is slowly added to the above-mentioned cobalt nitrate solution to meet the Co:Ni molar mass ratio 3:1, under the condition of vigorous stirring, slowly add potassium carbonate with a concentration of 15% to dissolve until the pH value of the above solution reaches 9.3, and obtain a carbonate precipitate, aging and standing for...

Embodiment 2

[0028] (1) Weigh 15.5 g of ammonium metavanadate and 69.6 g of ammonium paramolybdate, and dissolve them in 258 mL of deionized water, respectively, to form a salt solution, and add an appropriate amount of ethanolamine to accelerate the dissolution of ammonium metavanadate. The prepared salt solution was sequentially added to 516 g of titanium dioxide carrier by equal-volume impregnation method, and mixed and stirred in a mixer to obtain catalyst paste 1 .

[0029] (2) 1630.8g of cobalt nitrate hexahydrate was dissolved in 4080g of deionized water, and a clear solution was obtained under stirring conditions, and another 543.6g of nickel nitrate hexahydrate was slowly added to the above-mentioned cobalt nitrate solution to meet the requirement of Co:Ni molar The mass ratio is 3:1. Under the condition of vigorous stirring, slowly add potassium carbonate with a concentration of 15% to dissolve until the pH value of the above solution reaches 9.3, and obtain a carbonate precipitat...

Embodiment 3

[0033] (1) Weigh 38.55 g of ammonium metavanadate and 115 g of ammonium paramolybdate, dissolve them in 175 mL of deionized water respectively, and prepare each into a salt solution, and add an appropriate amount of ethanolamine to accelerate the dissolution of ammonium metavanadate. The prepared salt solution was sequentially added to 350 g of titanium dioxide carrier by equal-volume impregnation method, and mixed and stirred in a mixer to obtain catalyst paste 1 .

[0034] (2) 1359g of cobalt nitrate hexahydrate is dissolved in 3400g of deionized water, and a clear solution is obtained under stirring conditions, and another 453g of nickel nitrate hexahydrate is slowly added to the above-mentioned cobalt nitrate solution to meet the Co:Ni molar mass ratio 3:1, under the condition of vigorous stirring, slowly add potassium carbonate with a concentration of 15% to dissolve until the pH value of the above solution reaches 9.3, and obtain a carbonate precipitate, aging and standin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the field of industrial catalysis and environmental governance, in particular to a catalyst capable of removing N2O, NO and NO2 simultaneously and a preparation method of the catalyst. After tail gas containing N2O, NO and NO2 is subjected to the action of the catalyst, on one hand, N2O gas is decomposed directly, on the other hand, NO gas and NO2 gas are subjected to an SCR (selective catalytic reduction) denitration reaction, and simultaneous removal of N2O, NO and NO2 is realized. The plate catalyst capable of removing N2O, NO and NO2 simultaneously is prepared from V2O5 and a Co-based composite metal oxide as active components, TiO2 as a supporter and one or two of WO3 and MoO3 as a metal additive through mixing, rolling coating, pleating, drying and roasting. The N2O decomposing efficiency of the catalyst in the temperature range of 300-450 DEG C can reach 80% or higher, the NO removal rate and the NO2 removal rate can reach 85% or higher, and the catalyst has excellent oxygen inhibition resistance and water vapor poisoning resistance.

Description

technical field [0001] The invention relates to the field of industrial catalysis and environmental treatment, in particular to a combined removal of N 2 O, NO and NO 2 Catalysts and their preparation methods. Background technique [0002] As an important air pollutant, nitrogen oxides not only affect human health, but also pose a serious threat to the living environment. Common nitrogen oxides mainly include N 2 O, NO and NO 2 Wait. N 2 O has no serious harm to the human body, and its chemical properties are stable. However, studies have confirmed that N 2 O has a strong greenhouse effect, and its ability to cause the greenhouse effect is 310 times stronger than carbon dioxide, while N 2 O can also seriously damage the ozone layer, and its damage to the ozone layer is even greater than that of chlorofluorocarbons. While this gas destroys the ozone, it does not change itself, and its retention time in the atmosphere can reach as long as 120 years. Therefore, its accu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J23/883B01J23/887B01J23/888B01J23/89B01D53/86B01D53/56
CPCB01D53/8628B01J23/002B01J23/883B01J23/8877B01J23/888B01J23/898B01J2523/00B01J2523/22B01J2523/47B01J2523/55B01J2523/68B01J2523/69B01J2523/845B01J2523/847Y02C20/10Y02A50/20
Inventor 胡笑颖陆强马帅蔺卓玮唐昊仇志超董长青
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap