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Preparation method of low temperature flat plate type denitration catalyst

A denitration catalyst, flat-plate technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of pollution, poor selectivity of Mn-based catalysts, etc., to improve the selectivity and widen the active temperature. Window, the effect of reducing the amount of generation

Pending Publication Date: 2017-11-07
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the selectivity of Mn-based catalysts is poor, and above 100 °C, NO x partially converted to N 2 O, also cause pollution

Method used

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  • Preparation method of low temperature flat plate type denitration catalyst
  • Preparation method of low temperature flat plate type denitration catalyst
  • Preparation method of low temperature flat plate type denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example prepares Ti-Mo-V-Mn catalyst based on manganese acetate impregnation solution

[0029] Experimental steps:

[0030] (1) Weigh 1g of ammonium metavanadate and 1g of monoethanolamine, add 10ml of deionized water, and heat at 80°C until the ammonium metavanadate is completely dissolved;

[0031] (2) Weigh 60g of nanoscale titanium dioxide and 2g of ammonium heptamolybdate, add 20ml of deionized water and stir and mix in a kneader for 30min until uniformly mixed;

[0032] (3) Add the liquid obtained in step (1) into step (2), and continue to stir in the kneader for 30 minutes until uniform;

[0033] (4) Add pottery clay 3g, polyethylene oxide 0.1g, hydroxymethyl cellulose 0.1g and other raw materials in step (3), and continue to stir in the kneader for 30min until uniform;

[0034] (5) The obtained catalyst paste is evenly coated on a stainless steel mesh to obtain a catalyst veneer;

[0035] (6) Put the obtained catalyst veneer into a muffle furnace for cal...

Embodiment 2

[0039] This example prepares Ti-Mo-V-Mn catalyst based on manganese nitrate impregnation solution

[0040] Steps (1)-(6) are the same as in Example 1.

[0041] Step (7): taking by weighing 60g mass fraction is 50% manganese nitrate solution;

[0042] Step (8): Immerse the Ti-Mo-V flat-plate catalyst in the solution of (7), let it stand for 1 hour, then dry it in an oven at 80°C, and then place it in a muffle furnace at 400°C for 2 hours to obtain Ti - Mo-V-Mn catalyst, denoted as Ti-Mo-V-Mn(N).

Embodiment 3

[0059] This example prepares Ti-Mo-V-Mn catalyst based on manganese acetate impregnation solution

[0060] Experimental steps:

[0061] (1) Weigh 2g of ammonium metavanadate and 2g of monoethanolamine, add 10ml of deionized water, and heat at 80°C until the ammonium metavanadate is completely dissolved;

[0062] (2) Weigh 70g of nanoscale titanium dioxide and 3g of ammonium heptamolybdate, add 20ml of deionized water and stir and mix in a kneader for 30min until uniformly mixed;

[0063] (3) Add the liquid obtained in step (1) into step (2), and continue to stir in the kneader for 30 minutes until uniform;

[0064] (4) Add pottery clay 4g, polyethylene oxide 0.2g, hydroxymethyl cellulose 0.2g and other raw materials in step (3), and continue to stir in the kneader for 30min until uniform;

[0065] (5) The obtained catalyst paste is evenly coated on a stainless steel mesh to obtain a catalyst veneer;

[0066] (6) Put the obtained catalyst veneer into a muffle furnace for cal...

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PUM

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Abstract

The invention discloses a preparation method of a low temperature flat plate type denitration catalyst. The preparation method comprises the following steps: putting a Ti-Mo-V flat plate type catalyst into a manganese impregnating solution for impregnating, calcinating to obtain a Ti-Mo-V-Mn catalyst. According to the preparation method of the low temperature flat plate type denitration catalyst, the Ti-Mo-V catalyst is impregnated and dried in the manganese impregnating solution, most of MnOx is MnO2 with low temperature activity and even distribution; besides, selectivity of the catalyst can be improved by addition of V2O5, production amount of N2O is reduced, and an active temperature window is broadened.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a low-temperature plate type denitration catalyst. Background technique [0002] Flue gas nitrogen oxides (NO x ) is an important cause of regional pollution such as atmospheric haze, photochemical smog, and acid rain, seriously affecting human health and social stability, and effectively controlling flue gas NO x emissions for NO x It is of great significance to reduce the total emission and improve the regional atmospheric environment. [0003] The SCR method is the most mainstream NO removal method in the world x Methods. SCR is the use of appropriate catalysts, at a certain temperature, the use of reducing agents (such as NH 3 ) "selectively" with the NO in the flue gas x React and generate non-toxic and non-polluting N 2 and H 2 O. Catalyst is the core of SCR flue gas denitrification technology, and its performance directly affects the ov...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J37/02B01J37/08B01D53/86B01D53/56
CPCB01D53/8628B01J23/34B01J37/0201B01J37/08B01D2258/0283Y02C20/10
Inventor 董晓真李倩王虎黄力陈涛张捷纵宇浩严巍
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH