A kind of chromium-containing flue gas denitrification catalyst and preparation method thereof

A denitrification catalyst and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, heterogeneous catalyst chemical elements, etc., can solve catalyst poisoning failure, affect catalyst denitration rate, catalyst high denitration rate maintenance time is short, etc. question

Active Publication Date: 2022-06-07
利晟(杭州)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, certain pollutants in the complex flue gas are likely to cause catalyst poisoning and failure. Dust particles cover the surface of the catalyst and reduce its activity, which affects the denitration rate of the catalyst and makes the high denitration rate of the catalyst last for a short time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A chromium-containing flue gas denitration catalyst consists of a catalyst powder, a co-catalyst and a catalyst carrier;

[0038] The flue gas denitrification catalyst is prepared by the following steps:

[0039]The first step, the preparation of catalyst support: the activated carbon was added to the 5mol / L sodium hydroxide solution, the first mixture was obtained by stirring at 60 °C for 2h, and then the sodium metaaluminate and deionized water were mixed to obtain the second mixture; The first mixture and the second mixture were mixed in equal volumes, and then the gel was added at 90 °C and stirred for 1h, filtered, dried to constant weight, and the catalyst support was obtained;

[0040] The second step, the catalyst powder, co-catalyst and catalyst carrier according to the mass ratio of 6:0.3:100 mixed after adding mixer mixture, extrusion, the preparation of catalyst mud;

[0041] The third step, the catalyst slurry obtained in the second step into the molding machin...

Embodiment 2

[0056] A chromium-containing flue gas denitration catalyst consists of a catalyst powder, a co-catalyst and a catalyst carrier;

[0057] The flue gas denitrification catalyst is prepared by the following steps:

[0058] The first step, the preparation of catalyst support: the activated carbon was added to the 5mol / L sodium hydroxide solution, the first mixture was obtained by stirring at 60 °C for 2h, and then the sodium metaaluminate and deionized water were mixed to obtain the second mixture; The first mixture and the second mixture were mixed in equal volumes, and then the gel was added at 90 °C and stirred for 1h, filtered, dried to constant weight, and the catalyst support was obtained;

[0059] The second step is to mix the catalyst powder, co-catalyst and catalyst carrier according to the mass ratio of 7:0.3:100 and then add the mixer mixture and extrude the catalyst mud prepared;

[0060] The third step, the catalyst mud obtained in the second step into the molding machine...

Embodiment 3

[0075] A chromium-containing flue gas denitration catalyst consists of a catalyst powder, a co-catalyst and a catalyst carrier;

[0076] The flue gas denitrification catalyst is prepared by the following steps:

[0077] The first step, the preparation of catalyst support: the activated carbon was added to the 5mol / L sodium hydroxide solution, the first mixture was obtained by stirring at 60 °C for 2h, and then the sodium metaaluminate and deionized water were mixed to obtain the second mixture; The first mixture and the second mixture were mixed in equal volumes, and then the gel was added at 90 °C and stirred for 1h, filtered, dried to constant weight, and the catalyst support was obtained;

[0078]The second step, the catalyst powder, co-catalyst and catalyst carrier according to the mass ratio of 8:0.3:100 mixed after adding mixer mixture, extrusion, the preparation of catalyst mud;

[0079] The third step, the catalyst mud obtained in the second step into the molding machine, ...

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PUM

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Abstract

The invention discloses a chromium-containing flue gas denitration catalyst and a preparation method thereof. The chromium-containing flue gas denitration catalyst is composed of catalyst powder, a cocatalyst and a catalyst carrier; the flue gas denitration catalyst is prepared through the following steps: the first step, preparing the catalyst Carrier; the second step is to mix the catalyst powder, the cocatalyst and the catalyst carrier according to the mass ratio of 6-8:0.3:100, and then add them to the mixer for mixing and extruding to obtain the catalyst sludge; the third step is to mix the first The catalyst sludge obtained in the second step is put into a molding machine and extruded into a honeycomb body through a die. After extrusion, it is dried at 60-80°C for 10 hours, 100-120°C for 2 hours, 200-250°C for 2 hours, and 600°C. Calcined at ‑700°C for 1 hour to prepare a chromium-containing flue gas denitrification catalyst.

Description

Technical field [0001] The present invention belongs to the field of catalyst preparation technology, specifically relates to a chromium-containing flue gas denitrification catalyst and preparation method thereof. Background [0002] The pollution sources of nitrogen oxides that pose harm to the environment are mainly caused by human activities, which are mainly from the emissions of industrial and transportation fuel combustion, and some of them are from nitric acid plants, sulfuric acid plants, nitrogen fertilizer plants, dye factories, explosives plants and other industrial sectors that produce and apply nitric acid, which is one of the main sources of air pollution. The new thermal power generation boiler and gas turbine unit are implemented at 100mg / m 3 NOx emission limits. [0003] Invention patent CN1457920A A honeycomb ceramic catalyst for flue gas simultaneous desulfurization and denitrification is based on the surface treatment of iolite honeycomb ceramic as the carrier...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J23/30B01D53/86B01D53/56
CPCB01J23/002B01J23/28B01J23/30B01D53/8628B01J2523/00B01D2258/0283B01J2523/31B01J2523/47B01J2523/48B01J2523/55B01J2523/67B01J2523/68B01J2523/69Y02P20/30
Inventor 郦赛忠朱俊安曹红亚
Owner 利晟(杭州)科技有限公司
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