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Catalyst for removing dioxin in kiln flue gas through catalytic oxidation and preparation method of catalyst

A catalytic oxidation and catalyst technology, which is applied in the field of environmental protection and catalysts, can solve the problems of high decomposition temperature, difficult industrial production, and low decomposition efficiency, and achieve the effects of high decomposition efficiency, easy molding, and simple preparation methods

Active Publication Date: 2019-12-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a dioxin with high low-temperature activity, good stability, and easy industrial production for the problems of high decomposition temperature and low decomposition efficiency of the existing dioxin pollutant elimination catalyst. Catalyst for catalytic oxidation and elimination of British pollutants and preparation method thereof

Method used

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  • Catalyst for removing dioxin in kiln flue gas through catalytic oxidation and preparation method of catalyst
  • Catalyst for removing dioxin in kiln flue gas through catalytic oxidation and preparation method of catalyst
  • Catalyst for removing dioxin in kiln flue gas through catalytic oxidation and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Fully dissolve 0.64 g of ammonium metavanadate, 0.54 g of ammonium metatungstate and 0.35 g of tin tetrachloride in a mixed solution of 10 g of deionized water and 3 g of monoethanolamine, and record it as solution A;

[0026] (2) Add 8.75 g of titanium dioxide to solution A, disperse fully and evenly, and record the obtained solution as solution B;

[0027] (3) Add 0.12 g of ammonium molybdate into 3 g of deionized water, stir to fully dissolve it, and obtain C solution;

[0028] (4) Slowly add solution C and 0.5 g ammonia water to solution B under vigorous stirring to obtain solution D;

[0029] (5) Keep stirring solution D for 5 hours in a water bath at 40°C; after the above mixed solution evaporates to dryness to form a paste mixture, put the mixture in a blast drying oven for further drying at a drying temperature of 100°C. The time is 12 hours;

[0030] (6) Calcining the dried block in a muffle furnace, the calcination temperature is 400°C, the heating rate ...

Embodiment 2

[0032] (1) Fully dissolve 1.15 g of ammonium metavanadate, 0.54 g of ammonium metatungstate and 0.08 g of stannous chloride in a mixed solution of 15 g of deionized water and 2 g of monoethanolamine, and record it as solution A;

[0033] (2) Add 8.5 g of titanium dioxide to solution A, disperse fully and evenly, and record the obtained solution as solution A;

[0034] (3) Add 0.13 g of cerium nitrate to 3 g of deionized water, stir to fully dissolve it, and obtain C solution;

[0035] (4) Slowly add solution C and 1.0 g ammonia water to solution B under vigorous stirring to obtain solution D;

[0036] (5) The D solution was continuously stirred for 4 hours under the condition of a water bath at 50°C. After the above mixed solution was evaporated to dryness to form a paste mixture, the mixture was put into a blast drying oven for further drying. The drying temperature was 80°C, and the drying time was for 20 hours;

[0037] (6) Calcining the dried block in a muffle furnace, t...

Embodiment 3

[0039] (1) Fully dissolve 1.02 g of ammonium metavanadate, 0.37 g of ammonium paratungstate and 0.23 g of tin tetrachloride in a mixed solution of 20 g of deionized water and 1 g of monoethanolamine, and record it as solution A;

[0040] (2) Add 8.7 g of titanium dioxide into solution A, stir to dissolve it fully, and obtain solution B;

[0041] (3) Add 0.26 g of lanthanum nitrate to 5 g of deionized water, stir to fully dissolve it, and obtain C solution;

[0042] (4) Slowly add solution C and 1.5 g ammonia water to solution B under vigorous stirring to obtain solution D;

[0043] (5) The D solution was continuously stirred for 7 hours under the condition of a water bath at 30°C. After the water in the above mixed solution was evaporated to dryness to form a paste mixture, the mixture was placed in a blast drying oven for further drying. The drying temperature was 80°C and the drying time was for 15 hours;

[0044] (6) The dried block is placed in a muffle furnace for calci...

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Abstract

The invention provides a catalyst for catalytic oxidation elimination of dioxin pollutants in flue gas and waste gas from garbage incinerators, hazardous waste incinerators, medical waste incinerators, steel sintering furnaces, coal-fired power plants, funeral parlors and chemical plants, and a preparation method of the catalyst. According to the catalyst, industrial titanium dioxide is used as acarrier, SnO2-V2O5-WO3 composite oxide is used as an active component, and La2O3, MoO3, CeO2, Nb2O5, CuO, Pr6O11 and Sb2O3 are used as auxiliaries. According to the catalyst, the active components areuniformly dispersed on the surface of the carrier under the complexing action of an organic amine, and the catalyst auxiliaries are uniformly precipitated on the surface of the carrier under the condition of ammonia water, so that the catalyst is high in specific surface area, high in thermal stability and high in chlorine poisoning resistance, can continuously operate for a long time without activation, and is low in activation temperature and high in dioxin decomposition efficiency in dioxin pollutant elimination.

Description

technical field [0001] The invention relates to a catalyst and a preparation method for eliminating dioxins, in particular to a catalyst and a preparation method for catalytic oxidation to eliminate dioxins in kiln flue gas, and belongs to the field of catalysts and environmental protection. Background technique [0002] Dioxins can accumulate in the environment for a long time due to their stable chemical properties, good thermal stability and not easy to be biodegraded, causing very serious harm to organisms and the environment. Dioxins are mainly derived from various human life and production activities, including domestic waste incineration, hazardous waste and medical waste incineration, animal carcasses incineration treatment, steel sintering (pellet) plants, non-ferrous metal smelting, pulp and paper making , chemical products and pesticide production and other industries. [0003] There are many dioxin treatment technologies, including adsorption method, condensatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/888B01D53/86B01D53/70
CPCB01J23/002B01J23/30B01J23/888B01D53/8662B01D2258/0283B01D2257/2064B01J2523/00B01J2523/17B01J2523/3706B01J2523/3712B01J2523/3718B01J2523/43B01J2523/47B01J2523/53B01J2523/56B01J2523/69
Inventor 唐志诚赵海军张国栋韩维亮董芳
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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