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A kind of planar type denitration catalyst and preparation method thereof

A denitration catalyst, a flat-plate technology, applied in the field of denitration catalysts, can solve the problems of poor catalyst mechanical properties, environmental pollution, and high treatment costs, and achieve the effects of improving coating efficiency, high mechanical properties, and high catalytic activity.

Active Publication Date: 2018-08-24
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the mechanical properties of the catalyst are not good, severe peeling and other phenomena will not be regenerated during use. This part of the catalyst must be treated as hazardous waste, which is costly and seriously pollutes the environment.

Method used

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  • A kind of planar type denitration catalyst and preparation method thereof
  • A kind of planar type denitration catalyst and preparation method thereof
  • A kind of planar type denitration catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The main component is titanium dioxide, the particle size is 50nm, and the specific surface area is 250m 2 / of silicon dioxide, barium sulfate with a particle size of 50nm, V 2 o 5 The precursors of ammonium metavanadate and MoO 3 After the precursor ammonium heptamolybdate, methyl cellulose and stearic acid are mixed evenly, deionized water and ammonia water are added to stir, and the paste is obtained after stirring evenly, and its water content is 30%, and the pH is 8.0; the paste It is extruded into pieces by a twin-screw extruder, and the block paste is coated on a stainless steel mesh by a double-roller machine. After pressing and cutting, it is first heated to 520°C, calcined at a constant temperature for 10 hours, and then cooled to room temperature to obtain a flat plate. Denitration catalyst, wherein, the component and content in the denitration catalyst are TiO 2 89.5%, SiO 2 3%, BaSO 4 2%, V 2 o 5 1.5%, MoO 3 4%, the addition of methyl cellulose and...

Embodiment 2

[0019] The main component is titanium dioxide, the particle size is 50nm, and the specific surface area is 250m 2 / g of silica, barium sulfate with a particle size of 50nm, V 2 o 5 The precursors of ammonium metavanadate and MoO 3 The precursor ammonium heptamolybdate, methyl cellulose, stearic acid and sodium stearate are mixed evenly, then deionized water and ammonia water are added to stir, and after stirring evenly, a paste is obtained, the water content is 25%, and the pH is 7.5; The paste is extruded into pieces through a twin-screw extruder, and the block paste is coated on a stainless steel mesh by a double-roller machine. After being pressed and cut, the temperature is raised to 580°C, and the temperature is calcined for 7 hours, and then cooled to room temperature. That is, a flat-plate denitration catalyst is obtained, wherein the components and content of the denitration catalyst are TiO 2 87.5%, SiO 2 3%, BaSO 4 4%, V 2 o 5 1.5% and MoO 3 4%, the add-on of...

Embodiment 3

[0021] The main component is titanium dioxide, the particle size is 50nm, and the specific surface area is 250m 2 / g of silica, barium sulfate with a particle size of 50nm, V 2 o 5 The precursors of ammonium metavanadate and MoO 3 The precursor ammonium heptamolybdate, methyl cellulose, sodium stearate, zinc stearate and polyethylene wax are mixed evenly, then deionized water and ammonia water are added to stir, and the paste is prepared after stirring evenly, and its water content is 35 %, the pH is 8.5; the paste is extruded into pieces by a twin-screw extruder, and the block paste is coated on a stainless steel mesh by a double-roller machine. , and then cooled to room temperature to obtain a flat-plate denitration catalyst, wherein the components and content of the denitration catalyst are TiO 2 84.5%, SiO 2 3%, BaSO 4 7%, V 2 o 5 1.5%, MoO 3 4%, the addition of methyl cellulose and lubricant (sodium stearate, zinc stearate and polyethylene wax) accounts for respec...

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Abstract

The invention discloses a flat plate denitrification catalyst and a preparation method thereof. It includes the following components in terms of mass fraction: TiO2 75% to 90%, nanometer silica 3% to 10%, nanometer barium sulfate 2% to 7%, V2O50.5%~3.5% and MoO32%~8%; the preparation method includes mixing components titanium dioxide, nanometer silica, nanometer barium sulfate, ammonium metavanadate and ammonium heptamolybdate with methylcellulose and lubricant After homogenization, deionized water and ammonia are added and stirred to prepare a denitration catalyst paste. After coating, cutting and calcining the paste, a flat plate denitration catalyst is prepared. The advantage of the present invention is that by adding nanosilica and nanobarium sulfate, the synergistic effect of the two can effectively enhance the stability of the flat plate denitration catalyst skeleton and improve the high mechanical performance of the catalyst; at the same time, the preparation method is simple and has strong operability. No complex synthesis equipment is required and the cost is low.

Description

technical field [0001] The invention belongs to the field of denitration catalysts, in particular to a flat plate denitration catalyst and a preparation method thereof. Background technique [0002] The pollution of nitrogen oxides to the environment is very serious. Nitrogen oxides are not only the basis of nitric acid rain, but also one of the main substances that form photochemical smog and destroy the ozone layer. Nitrogen oxides are also very toxic and will cause serious damage to human health. Big damage. In recent years, with the rapid development of the economy, the emission of nitrogen oxide pollutants has increased rapidly, seriously polluting the ecological environment, and has become an environmental issue of global concern. [0003] By installing denitrification devices in thermal power plants and industrial furnaces, the emission of nitrogen oxides can be controlled. Selective catalytic reduction (SCR) denitrification is the most widely used and most mature fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053B01D53/86B01D53/56
CPCB01D53/8628B01J27/053B01D2258/0283B01J35/40
Inventor 李倩王虎王晓伟张捷
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH