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Preparation method of denitration and demercuration catalyst and catalyst prepared thereby

A catalyst and mercury removal technology, applied in heterogeneous catalyst chemical elements, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of improving efficiency and improving sulfur resistance and water resistance

Pending Publication Date: 2021-04-09
DATANG ENVIRONMENT IND GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for preparing a denitrification and demercuration catalyst and the catalyst prepared by the method, so as to solve the problem that the activity temperature window of the traditional commercial vanadium-tungsten-titanium catalyst is too high and seriously deviates from the Hg 0 Oxidation conversion temperature and denitrification temperature window, resulting in low denitrification and mercury removal efficiency

Method used

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  • Preparation method of denitration and demercuration catalyst and catalyst prepared thereby
  • Preparation method of denitration and demercuration catalyst and catalyst prepared thereby

Examples

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Effect test

Embodiment 1

[0037] With a configured concentration of 10% HNO 3 The beaker, glass rod, magnetic rotor, etc. used to prepare the catalyst were washed with the solution and deionized water three times, and then dried; then, 100mL deionized water was poured into the dried beaker, and 0.6gH 40 N 10 o 41 W 12 ·xH 2 O, 0.3g of NH 4 VO 3 Pour the oxalic acid into the beaker, put the magnetic rotor into the beaker, place the beaker on the magnetic stirrer, heat and stir at 60°C to make it fully dissolve, the amount of oxalic acid is to ensure that the H 40 N 10 o 41 W 12 ·xH 2 O and NH 4 VO 3 Completely dissolved shall prevail; then weigh 7.9g TiO 2 (P25) powder, 1.8g Mn(NO 3 ) 2 Pour into a beaker (here H 40 N 10 o 41 W 12 , NH 4 VO 3 、TiO 2 and Mn(NO 3 ) 2 The mass ratio is equivalent to 12:6:158:36 in the claim), and continued to stir for 12 hours at normal temperature. Usually, in order to prevent the catalyst from being polluted, the mouth of the beaker can be sealed w...

Embodiment 2

[0039] With a configured concentration of 10% HNO 3 The beaker, glass rod, magnetic rotor, etc. used to prepare the catalyst were washed with the solution and deionized water three times, and then dried; then, 100mL deionized water was poured into the dried beaker, and 0.6gH 40 N 10 o 41 W 12 ·xH 2 O, 0.3g of NH 4 VO 3 Pour the oxalic acid into the beaker, put the magnetic rotor into the beaker, place the beaker on the magnetic stirrer, heat and stir at 60°C to make it fully dissolve, the amount of oxalic acid is to ensure that the H 40 N 10 o 41 W 12 ·xH 2 O and NH 4 VO 3 Completely dissolved shall prevail; then weigh 7.9g TiO 2 (P25) powder, 3.6g Mn(NO 3 ) 2 Pour into a beaker (here H 40 N 10 o 41 W 12 , NH 4 VO 3 、TiO 2 and Mn(NO 3 ) 2 The mass ratio is equivalent to 12:6:158:72 in the claim), and continued to stir for 12 hours at normal temperature. Usually, in order to prevent the catalyst from being polluted, the mouth of the beaker can be sealed w...

Embodiment 3

[0041] With a configured concentration of 10% HNO 3 The beaker, glass rod, magnetic rotor, etc. used to prepare the catalyst were washed with the solution and deionized water three times, and then dried; then, 100mL deionized water was poured into the dried beaker, and 0.6gH 40 N 10 o 41 W 12 ·xH 2 O, 0.3g of NH 4 VO 3 Pour the oxalic acid into the beaker, put the magnetic rotor into the beaker, place the beaker on the magnetic stirrer, heat and stir at 60°C to make it fully dissolve, the amount of oxalic acid is to ensure that the H 40 N 10 o 41 W 12 ·xH 2 O and NH 4 VO 3 Completely dissolved shall prevail; then weigh 7.9g TiO 2 (P25) powder, 7.2g Mn(NO 3 ) 2 Pour into a beaker (here H 40 N 10 o 41 W 12 , NH 4 VO 3 、TiO 2 and Mn(NO 3 ) 2 The mass ratio is equivalent to 12:6:158:144 in the claim), and continue to stir for 12 hours at normal temperature. Usually, in order to prevent the catalyst from being polluted, the mouth of the beaker can be sealed w...

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Abstract

The invention relates to the field of air pollution control, in particular to a preparation method of a denitration and demercuration catalyst, and a catalyst prepared by the method. The preparation method of the denitration and demercuration catalyst comprises the following steps of: putting H40N10O41W12 and NH4VO3 into a solvent, performing stirring and dissolving, then adding TiO2 and Mn(NO3)2 into the obtained mixed solution, and continuously performing stirring to obtain viscous liquid; and sequentially drying, calcining and grinding the viscous liquid to obtain the denitration and demercuration catalyst, wherein the mass ratio of H40N10O41W12 to NH4VO3 to TiO2 is (6-20):(1-18):158, and the mass ratio of Mn(NO3)2 to NH4VO3 is (6-48):1. The problem that the denitration and demercuration efficiency is low due to the fact that the activity temperature window of a traditional commercial vanadium-tungsten-titanium catalyst is too high and seriously deviates from the oxidation conversion temperature and denitration temperature window of Hg<0> is solved.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to a preparation method of a denitrification and demercuration catalyst and the catalyst prepared by the method. Background technique [0002] Nitrogen oxides (NO x ) refers to a compound composed only of nitrogen and oxygen. Nitrogen oxides in automobile exhaust react with hydrocarbons to form toxic smog, that is, photochemical smog; nitrogen oxides react with water in the air to form nitric acid and nitrous acid, which are the main components of acid rain. Therefore, nitrogen oxides will not only cause great harm to the human body, but also nitrogen oxides mainly composed of nitric oxide and nitrogen dioxide are also an important reason for the formation of photochemical smog and acid rain. [0003] Nitrogen oxides emitted from coal-fired power plants in the form of NO and NO 2 Mainly, in which NO generation exceeds 90%, NO 2 About 5%. While coal-fired power plants contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J35/10B01D53/86B01D53/56B01D53/64
CPCB01J23/34B01J23/002B01D53/8628B01D53/8665B01J2523/00B01D2258/06B01D2258/012B01J35/60B01J2523/47B01J2523/55B01J2523/69B01J2523/72
Inventor 陶君段钰锋谷小兵黄先进胡鹏孟佳琳陈亚南
Owner DATANG ENVIRONMENT IND GRP
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