Catalyst for cleaning waste incineration flue gas and preparation method thereof

A flue gas purification and waste incineration technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of not reducing the total amount of dioxins, Achieve the effects of enhanced capture energy, improved catalytic activity, and wide sources

Active Publication Date: 2021-08-13
AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of activated carbon to adsorb dioxins in flue gas only transfers dioxins from flue gas to activated carbon, and does not reduce the total amount of dioxins, and the activated carbon after adsorbing dioxins is hazardous waste and needs to be sent to Qualified hazardous waste treatment plant for treatment to prevent the escape of dioxins

Method used

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preparation example Construction

[0036]The invention provides a method for preparing a catalyst for purifying waste incineration flue gas, comprising the following steps:

[0037] Calculate according to the amount of active components and coagents and weigh the corresponding precursors, wherein: the precursors of the active components are ammonium metavanadate, dinitrosodiammine platinum, and sodium tungstate; The body is manganese nitrate tetrahydrate, iron nitrate, copper nitrate, tin oxide, cerium nitrate; the precursor of carrier titanium dioxide is tetrabutyl titanate or titanium alkoxide;

[0038] Step 1. Add glacial acetic acid and absolute ethanol to deionized water, stir and mix evenly, as solution A;

[0039] Step 2, dissolving tetrabutyl titanate or titanium alkoxide in absolute ethanol and stirring evenly, as solution B;

[0040] Step 3, mixing solution A and solution B to obtain solution C, and adding ammonium metavanadate, dinitrosodiammine platinum and oxalic acid to solution C under stirring ...

Embodiment 1

[0050] A catalyst for purifying waste incineration flue gas, with vanadium pentoxide, platinum oxide, and tungsten oxide as active components, gamma-alumina, titanium dioxide, and carbon nanotubes as carriers, and manganese oxide, iron oxide, copper oxide, The mixture of tin oxide and cerium oxide is active auxiliary agent;

[0051] Among them, the proportion of γ-alumina in the carrier is 20wt%, the proportion of titanium dioxide is 50wt%, and the proportion of carbon nanotubes is 30wt%. Based on the total weight of the support, the loading capacity of vanadium in the active component is 1.5 wt%, the loading amount of platinum is 0.5wt%, the loading amount of tungsten is 2wt%, and the loading amount of coagent is 0.5wt%.

[0052] Calculate based on the amount of vanadium pentoxide, platinum oxide, tungsten oxide, titanium dioxide, manganese oxide, iron oxide, copper oxide, tin oxide, and cerium oxide, and weigh the corresponding precursor materials, ammonium metavanadate and ...

Embodiment 2

[0055] A catalyst for purifying waste incineration flue gas, with vanadium pentoxide, platinum oxide, and tungsten oxide as active components, gamma-alumina, titanium dioxide, and carbon nanotubes as carriers, and manganese oxide, iron oxide, copper oxide, The mixture of tin oxide and cerium oxide is active auxiliary agent;

[0056] Among them, the proportion of γ-alumina in the carrier is 30wt%, the proportion of titanium dioxide is 40wt%, and the proportion of carbon nanotubes is 30wt%. Based on the total weight of the support, the loading capacity of vanadium in the active component is 1.5 wt%, the loading amount of platinum is 0.5wt%, the loading amount of tungsten is 2wt%, and the loading amount of coagent is 0.5wt%.

[0057] Calculate based on the amount of vanadium pentoxide, platinum oxide, tungsten oxide, titanium dioxide, manganese oxide, iron oxide, copper oxide, tin oxide, and cerium oxide, and weigh the corresponding precursor materials, ammonium metavanadate and ...

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Abstract

The invention discloses a catalyst for purifying waste incineration flue gas. The catalyst uses vanadium pentoxide, platinum oxide and tungsten oxide as active components, γ-alumina, titanium dioxide and carbon nanotubes as carriers, and manganese oxide One or more of , iron oxide, copper oxide, tin oxide, and cerium oxide are coagents. The catalyst of the invention not only has the function of decomposing dioxins and chlorobenzene compounds, but also has the function of denitrification and anti-sulfur, and still has excellent removal ability for dioxins and NOx at relatively low temperature. The invention also discloses a preparation method of the catalyst for purifying waste incineration flue gas. The preparation method has the advantages of simple operation, convenience and controllability, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of exhaust gas purification catalysts, in particular to a catalyst for waste incineration flue gas purification and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, more and more domestic wastes are produced. Due to the large amount of output, complex and diverse components, and polluting, resourceful, and social nature of domestic waste, it needs to be treated in a harmless, resourceful, and reduced manner. If it is not properly disposed of, it will pollute the environment, affect environmental sanitation, Waste of resources, destroy production and living safety and social harmony. At present, common domestic waste disposal methods mainly include sanitary landfill, high-temperature composting, and incineration. Compared with the first two technologies, the incineration method is a relatively better treatment method. After the gar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/847B01J23/656B01J23/89B01J23/62B01J23/63B01J23/888B01J23/30B01D53/86B01D53/56B01D53/70
CPCB01D53/8628B01D53/8662B01D2258/0291B01J23/002B01J23/30B01J23/34B01J23/626B01J23/63B01J23/6562B01J23/8472B01J23/888B01J23/8906B01J23/8926
Inventor 邱敬贤刘强何曦
Owner AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD
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