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mno 2 /tif catalyst and preparation method thereof

A catalyst and oxidant technology, applied in the field of denitrification catalysts, can solve problems such as increased production costs and complex catalyst preparation processes

Active Publication Date: 2022-03-04
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst preparation process is relatively complicated, and the use of rare earth metals increases the production cost

Method used

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  • mno <sub>2</sub> /tif catalyst and preparation method thereof

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Experimental program
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Embodiment 1

[0029] The MnO of this embodiment 2 / TiF catalyst, including TiF support and active component MnO supported on TiF 2 . The molar ratio of Mn to Ti is 0.5:100.

[0030] The MnO of this embodiment 2 The preparation method of / TiF catalyst comprises the following steps:

[0031] (1) Place a titanium foam disc with a diameter of 4 cm, a mass of 1.2 g, and an average pore diameter of 20 μm in a levodopa solution with a pH of 8.5 and a concentration of 2 g / L, and continuously stir and react for 24 hours. Suction filtration, water washing, Alcohol washing and drying to obtain modified TiF;

[0032] (2) configuration concentration is the manganese chloride solution of 0.09mol / L;

[0033] (3) Place the modified TiF in step (1) in manganese chloride solution, stir and sonicate for 8h, then add KMnO with a concentration of 0.06mol / L 4 Aqueous solution, continue to stir and sonicate for 8h, then filter, wash with water, wash with alcohol, and dry at 105°C to obtain MnO 2 / TiF cataly...

Embodiment 2

[0035] The MnO of this embodiment 2 / TiF catalyst, including TiF support and active component MnO supported on TiF 2 , the molar ratio of Mn to Ti is 1.5:100.

[0036] The MnO of this embodiment 2 The preparation method of / TiF catalyst comprises the following steps:

[0037] (1) Place a titanium foam disc with a diameter of 4 cm, a mass of 1.2 g, and an average pore diameter of 20 μm in a levodopa solution with a pH of 8.5 and a concentration of 2 g / L, and continuously stir and react for 24 hours. Suction filtration, water washing, Alcohol washing and drying to obtain modified TiF;

[0038] (2) configuration concentration is the manganese acetate solution of 0.27mol / L;

[0039] (3) Place the modified TiF in step (1) in manganese acetate solution, stir and sonicate for 1h, then add KMnO with a concentration of 0.18mol / L 4 Aqueous solution, continue to stir and sonicate for 1h, then filter, wash with water, wash with alcohol, and dry at 105°C to obtain MnO 2 / TiF catalyst,...

Embodiment 3

[0041] The MnO of this embodiment 2 / TiF catalyst, including TiF support and active component MnO supported on TiF 2 , the molar ratio of Mn to Ti is 2.5:100.

[0042] The MnO of this embodiment 2 The preparation method of / TiF catalyst comprises the following steps:

[0043] (1) Place a titanium foam disc with a diameter of 4 cm, a mass of 1.2 g, and an average pore diameter of 20 μm in a levodopa solution with a pH of 8.5 and a concentration of 2 g / L. After continuous stirring and reaction for 24 hours, suction filtration, water washing, alcohol Wash and dry to get modified TiF;

[0044] (2) configuration concentration is the manganese acetate solution of 0.45mol / ;

[0045] (3) Put the modified TiF in step (1) in manganese acetate solution, stir and sonicate for 1h, then add KMnO with a concentration of 0.30mol / L 4 Aqueous solution, continue to stir and sonicate for 1h, then filter, wash with water, wash with alcohol, and dry at 105°C to obtain MnO 2 / TiF catalyst, mark...

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Abstract

The present invention specifically relates to MnO 2 The invention discloses a TiF catalyst and a preparation method thereof, belonging to the technical field of denitration catalysts. MnO of the present invention 2 The / TiF catalyst includes a carrier and an active component, the carrier is TiF, and the active component is MnO 2 . Wherein the molar ratio of Mn to Ti is 0.5-3.5:100. The present invention utilizes the modification effect of levodopa or dopamine to introduce a catechol functional group capable of chelating metal cations on the surface of inert TiF to achieve Mn 2+ adsorption, and then redox reaction with potassium permanganate to obtain MnO 2 / TiF catalyst. The catalyst exhibits good low-temperature denitrification activity at 80-180° C., and has a simple and mild preparation process.

Description

technical field [0001] The invention belongs to the technical field of denitrification catalysts, in particular to MnO 2 / TiF catalyst and preparation method thereof. Background technique [0002] NO x As a common air pollutant, it has caused a series of environmental problems, such as acid rain, photochemical pollution and ozone layer destruction. Therefore, all countries have formulated strict NO x emissions law. At the same time, researchers from various countries have also invested a lot of energy in researching flue gas denitrification technology. Among them, ammonia selective catalytic reduction of NO (SCR) is recognized as the most mature and effective denitrification technology, and the performance of the catalyst in the SCR process determines its denitrification performance. [0003] At present, the vanadium-titanium system catalyst is a kind of SCR catalyst that has been commercialized, but its operating temperature window (300-400°C) is relatively high and it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/38B01J35/10B01D53/86B01D53/56
CPCB01D53/8628B01J31/38B01J35/60
Inventor 张延兵宋城建程相龙刘丽华丁明洁李刚赵海鹏
Owner HENAN UNIV OF URBAN CONSTR