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A kind of honeycomb type denitrification catalyst and preparation method thereof

A denitrification catalyst, honeycomb technology, applied in the field of selective catalytic reduction catalyst, to achieve the effect of low cost, excellent mechanical properties and anti-poisoning performance, and long operating life

Active Publication Date: 2022-04-12
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are still few reports on simultaneously enhancing the mechanical properties and anti-poisoning properties of cellular denitration catalysts through effective means.

Method used

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  • A kind of honeycomb type denitrification catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh the sepiolite fiber, place it in 1mol / L HCl solution (solid-to-liquid ratio 1:80), and then add AEO-15 in an amount of 0.5% of the mass of the mineral fiber. Stir and reflux at 60°C for 5 hours, filter, dry, and roast at 500°C for 2 hours;

[0035] The roasted sepiolite fiber and TiO 2 Mix, add deionized water, attapulgite, ammonium metavanadate solution, ammonium metatungstate solution, polyvinyl alcohol, mix evenly to form a paste, extrude, dry, and calcined at 500°C for 2 hours to obtain Honeycomb denitrification catalyst.

[0036] The mass fraction ratio of paste ingredients is: 10% of calcined sepiolite fiber, TiO 2 70%, binder 5%, ammonium metavanadate 1%, ammonium metatungstate 4%, molding aid 5%, and the rest is water.

Embodiment 2

[0038] Weigh wollastonite fiber and place in 0.5mol / L HNO 3 In the solution (solid-to-liquid ratio 1:100), add AEO-10, the amount added is 2% of the mineral fiber mass. Stir and reflux at 90°C for 1 hour, filter, dry, and roast at 400°C for 5 hours;

[0039] The fired wollastonite fiber and TiO 2 Mix, add deionized water, Al 2 o 3 , ammonium metavanadate solution, ammonium metatungstate solution, and carboxymethyl cellulose, mixed evenly to form a paste, extruded, dried, and calcined at 400°C for 6 hours to obtain a honeycomb denitration catalyst.

[0040] The mass fraction ratio of the paste components is: 5% wollastonite fiber after roasting, TiO 2 65%, binder 1%, ammonium metavanadate 0.5%, ammonium metatungstate 2.5%, molding aid 2.5%, and the rest is water.

Embodiment 3

[0042] Weigh wollastonite fiber and place in 5mol / L H 2 SO 4 Solution (solid-to-liquid ratio 1:20), then add OP-10, the amount added is 5% of the mineral fiber mass. Stir and reflux at 50°C for 8 hours, filter, dry, and roast at 600°C for 1 hour;

[0043] The fired wollastonite fiber and TiO 2 Mix, add deionized water, clay, ammonium metavanadate solution, ammonium metatungstate solution, hydroxypropyl cellulose, mix evenly to form a paste, extrude, dry, and calcined at 600°C for 1 hour to obtain Honeycomb denitrification catalyst.

[0044] The mass fraction ratio of paste ingredients is: 1% wollastonite fiber after roasting, TiO 2 50%, binder 2%, ammonium metavanadate 1.5%, ammonium metatungstate 3%, molding aid 1%, and the rest is water.

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Abstract

The invention discloses a honeycomb denitrification catalyst and a preparation method thereof. Mineral fibers are weighed, placed in a 0.5-5mol / L inorganic acid solution, and a non-ionic surfactant is added, stirred and refluxed at 50-90°C. , after treatment for 1~8h, filter, dry, and roast at 400~600°C for 1~5h; the roasted mineral fiber and TiO 2 Mix, add deionized water, binder, ammonium metavanadate solution, ammonium metatungstate solution, molding aids, mix evenly, form a paste, extrude, dry, and calcined at 400~600℃ for 1~6h Finally, the honeycomb denitration catalyst is prepared. By adopting the preparation method of the invention, the prepared honeycomb denitration catalyst has high denitration activity. Moreover, it has excellent mechanical properties and anti-poisoning properties. The catalyst has strong industrial applicability and long operating life.

Description

technical field [0001] The invention relates to the technical field of selective catalytic reduction catalysts, in particular to a honeycomb denitration catalyst and a preparation method thereof. Background technique [0002] Selective catalyst reduction (SCR) technology has been widely used in denitrification projects of coal-fired power plants in my country due to its advantages of high denitrification efficiency and small footprint. The core of SCR technology is the denitrification catalyst, which can be classified into three types according to the structure: honeycomb type, flat plate type and corrugated plate type. Among them, the market share of honeycomb denitration catalyst is relatively high. [0003] In actual working conditions, the denitrification catalyst will gradually deactivate due to the increase of operating time. The main reasons are divided into two types: physical deactivation and chemical poisoning. Among them, the physical deactivation mainly include...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 黄力常峥峰纵宇浩王虎于洋张鑫闫力任启柏
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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