MnO2 low-temperature denitration catalyst based on MXene carrier, and preparation method thereof

A low-temperature denitrification and catalyst technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve the toxicity of V-based catalysts , high operating temperature window, etc., to achieve good low-temperature denitrification activity and mild preparation method

Pending Publication Date: 2020-09-18
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of MnO based on MXene carrier 2 Low-temperature denitrification catalyst and preparation method to solve the problems of the core catalyst of the existing SCR denitrification technology proposed in the above-mentioned background technology, which has a relatively high operating temperature window (300-400 ° C) and the toxicity of V-based catalysts

Method used

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  • MnO2 low-temperature denitration catalyst based on MXene carrier, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An MXene-supported MnO 2 Low temperature denitration catalyst, the carrier of the catalyst is MXene, and the active component is MnO 2 Metal oxides, of which MnO 2 The loading amount of / MXene catalyst was 0.02-0.08, and the preparation of MXene support was referred to the relevant literature.

[0019] A kind of MnO based on MXene carrier as claimed in claim 1 2 Preparation method of low temperature denitration catalyst, the MnO based on MXene carrier 2 The preparation method of the low-temperature denitration catalyst comprises the following steps: preparing MnO with polypyrrole-modified MXene 2 / MXene catalyst as an example, the method for preparing the catalyst with poly(3,4-ethylenedioxythiophene) modified MXene support is similar:

[0020] S1: Modification of MXene: The MXene carrier is placed in 0.01-0.3 mol / L pyrrole acetone, immersed in pyrrole acetone for 3-5 hours, filtered, and dissolved in acetone at room temperature to obtain MXene with pyrrole monomer ...

Embodiment 2

[0023] In this example, MnO was prepared from polypyrrole-modified MXene 2 / MXene catalyst as an example, the method of poly(3,4-ethylenedioxythiophene)-modified MXene support to prepare catalyst is similar).

[0024] (1) Modification treatment of MXene: The MXene carrier was immersed in 0.04mol / L pyrrole acetone for 3-5 hours, filtered, and dissolved in acetone at room temperature to obtain MXene with pyrrole monomer adsorbed on the surface;

[0025] (2) The MXene obtained in step (1) is placed in a KMnO4 solution with a concentration of 0.04mol / L, stirred and reacted at room temperature for 1-3h, suction filtered, washed with water, washed with alcohol, and dried at 100°C to prepare MnO in situ 2 / Ppy / MXene low temperature denitration catalyst;

[0026] Test conditions for denitration activity: the total flow rate of simulated flue gas is 600mL / min, [NO]=[NH 3 ]=500ppm, [O 2 ]=5%, N 2 As the balance gas, the space velocity is 60000mL·g -1 ·h -1 , measured as 0.02MnO 2...

Embodiment 3

[0028] In this example, MnO was prepared from polypyrrole-modified MXene 2 / MXene catalyst as an example, the method of poly(3,4-ethylenedioxythiophene)-modified MXene support to prepare catalyst is similar).

[0029] (1) Modification treatment of MXene: The MXene carrier was immersed in 0.04mol / L pyrrole acetone for 3-5 hours, filtered, and dissolved in acetone at room temperature to obtain MXene with pyrrole monomer adsorbed on the surface;

[0030] (2) The MXene obtained in step (1) was placed in a KMnO4 solution with a concentration of 0.06 mol / L, stirred and reacted at room temperature for 1 to 3 h, suction filtered, washed with water, washed with alcohol, and dried at 100 °C to prepare MnO in situ. 2 / Ppy / MXene low temperature denitration catalyst;

[0031] Test conditions for denitration activity: the total flow rate of simulated flue gas is 600mL / min, [NO]=[NH 3 ]=500ppm, [O 2 ]=5%, N 2 As the balance gas, the space velocity is 18000mL·g -1 ·h -1 , measured as 0....

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Abstract

The invention discloses a MnO2 low-temperature denitration catalyst based on an MXene carrier, and a preparation method thereof, and belongs to the technical field of catalyst preparation. A carrier of the catalyst is MXene, an active component of the catalyst is MnO2 metal oxide, the molar ratio of MnO2 to MXene is 0.01 to 0.1, and the MXene carrier is prepared based on related literature. The MXene is used as the carrier, the modification effect of polypyrrole or poly(3,4-ethylenedioxythiophene) is utilized, a redox reaction between polypyrrole or poly(3,4-ethylenedioxythiophene) and KMnO4 is combined, the MnO2 / MXene low-temperature denitration catalyst is obtained through in-situ generation of the MnO2 active component on the surface of the MXene, the catalyst shows good low-temperaturedenitration activity at the temperature of 80-180 DEG C, and the preparation method of the catalyst is mild and safe.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a MXene carrier-based MnO 2 Low temperature denitration catalyst and preparation method. Background technique [0002] Denitrification catalysts generally refer to the catalysts used in the SCR denitration system of power plants. In the SCR reaction, the substances that promote the chemical reaction between the reducing agent and the nitrogen oxides in the flue gas at a certain temperature are basically the current commercial SCR catalysts. With TiO2 as the carrier, V2O5 as the main active component, and WO3 and MoO3 as the auxiliary components for anti-oxidation and anti-poisoning, the catalyst type can be divided into three types: plate type, honeycomb type and corrugated plate type. The plate type catalyst is made of stainless steel metal plate. The metal mesh is used as the base material, and the mixture of TiO2, V2O5, etc. is adhered to the stainless steel mesh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J23/34B01J27/24B01J27/22B01D53/86B01D53/56
CPCB01J31/069B01J23/34B01J27/24B01J27/22B01D53/8628B01D2258/0283
Inventor 张延兵程相龙陈英赞任海波黄金鹤郭晋菊
Owner HENAN UNIV OF URBAN CONSTR
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