A kind of catalyst used for catalytic oxidation to eliminate dioxin in kiln flue gas and preparation method thereof

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

Active Publication Date: 2022-03-25
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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  • A kind of catalyst used for catalytic oxidation to eliminate dioxin in kiln flue gas and preparation method thereof
  • A kind of catalyst used for catalytic oxidation to eliminate dioxin in kiln flue gas and preparation method thereof
  • A kind of catalyst used for catalytic oxidation to eliminate dioxin in kiln flue gas and preparation method thereof

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 method for catalytic oxidation of dioxin-like pollutants in waste incinerators, hazardous waste incinerators, medical waste incinerators, steel sintering furnaces, coal-fired power plants, funeral homes and chemical plant flue gas and exhaust gases. Eliminated catalysts and methods of preparation. The catalyst is supported by industrial titanium dioxide, SnO 2 -V 2 o 5 -WO 3 Composite oxide is the active component, La 2 o 3 、MoO 3 , CeO 2 , Nb 2 o 5 , CuO, Pr 6 o 11 and Sb 2 o 3 as an auxiliary agent. In the catalyst prepared by the present invention, the active components are uniformly dispersed on the surface of the carrier under the complexation of organic amines, and the catalyst auxiliary agent is uniformly precipitated on the surface of the carrier under the condition of ammonia water, so that the catalyst has a high specific surface area, high thermal stability and comparative Strong anti-chlorine poisoning ability, continuous long-term operation without activation, low operating temperature in the elimination of dioxin-like pollutants, and high dioxin decomposition efficiency.

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 Patents(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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