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Flue gas denitration catalyst and preparation method thereof

A denitration catalyst, flue gas technology, applied in catalyst activation/preparation, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problems of poor activity, low catalytic activity of catalyst, small specific surface area, etc. , the effect of large specific surface area and low energy consumption

Active Publication Date: 2021-06-29
运城市锦汇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low catalyst catalytic activity, small specific surface area and poor activity in the prior art, the technical problem to be solved by the present invention is to provide a void / MnO 2 / void / NiCo 2 o 4 Composite Flue Gas Denitrification Catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Adopt electrospinning process to prepare PVP three-dimensional network fiber, to its plasma treatment; Get the potassium permanganate of 0.1mol and be dissolved in 50ml, in the mixed solution of the water / ethylene glycol that volume ratio is 1:1, then will Put 0.5g of PVP fiber into the reaction kettle of potassium permanganate, and conduct a hydrothermal reaction at 180°C for 8 hours to obtain PVP / MnO with a three-dimensional core-shell structure. 2 composite materials;

[0016] (2) Dissolve 0.4mol of zinc nitrate in deionized water, drop a certain amount of ammonia water, adjust the pH to 7.8-9, add the PVP / MnO of step (1) 2 The composite material was stirred, then placed in a high-pressure reactor, and reacted at 180 ° C for 6 hours to obtain PVP / MnO 2 / ZnO composite material; dissolve the composite material in ethanol, add nickel salt and cobalt salt, drop ammonia water into the hydrothermal reaction, and obtain PVP / MnO 2 / ZnO / NiCo 2 o 4 The composite materi...

Embodiment 2

[0019] (1) Prepare PVP three-dimensional network fiber by electrospinning process, and treat it with plasma; get 0.1mol of potassium permanganate and dissolve it in a mixed solution of 50ml water / ethylene glycol with a volume ratio of 1:1, and then add 0.5 g of PVP fibers were placed in a potassium permanganate reactor, and hydrothermally reacted at 180°C for 8 hours to obtain a three-dimensional core-shell structure of PVP / MnO 2 composite materials;

[0020] (2) Dissolve 0.4mol of zinc nitrate in deionized water, drop a certain amount of ammonia water, adjust the pH to 7.8-9, add the PVP / MnO of step (1) 2 The composite material was stirred, then placed in a high-pressure reactor, and reacted at 180 ° C for 6 hours to obtain PVP / MnO 2 / ZnO composite material; dissolve the composite material in ethanol, add nickel salt and cobalt salt, drop ammonia water into the hydrothermal reaction, and obtain PVP / MnO 2 / ZnO / NiCo 2 o 4 The composite material is soaked in NaOH, and then c...

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Abstract

The invention relates to a flue gas denitration catalyst and a preparation method thereof. The preparation method comprises the following steps: (1) preparing PVP (Polyvinyl Pyrrolidone) fibers by adopting an electrostatic spinning process, carrying out plasma treatment, putting the PVP fiber into a potassium permanganate solution, transferring the formed system into a reaction kettle, and carrying out hydrothermal reaction to obtain a PVP / MnO2 composite material with a three-dimensional core-shell structure; and (2) transferring the PVP / MnO2 composite material into a mixed solution containing zinc salt and ammonia water, conducting stirring, and then putting the stirred materials into a high-pressure reaction kettle to obtain a PVP / MnO2 / ZnO composite material, dissolving the PVP / MnO2 / ZnO composite material in ethanol, adding a nickel salt and a cobalt salt, dropwise adding ammonia water in a hydrothermal manner, carrying out a hydrothermal reaction to obtain a PVP / MnO2 / ZnO / NiCo2O4 composite material, soaking the composite material in NaOH, and carrying out calcination in an air atmosphere to remove a template to obtain the void / MnO2 / void / NiCo2O4 composite material. The catalyst has a relatively large specific surface area and good structural stability, and MnO2 and NiCo2O4 have a synergistic effect, so that the catalyst has relatively good catalytic activity.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a flue gas denitrification catalyst and a preparation method thereof. Background technique [0002] Nitrogen oxides emitted from coal-fired boilers, glass furnaces and cement furnaces are one of the main pollutants that cause acid rain, photochemical smog, etc., causing great pollution to the atmosphere, destroying the ecological environment, and harming human health. How to effectively eliminate nitrogen oxides has become the focus and difficulty of air pollution control. Selective Catalytic Reduction (SCR) denitrification technology is the flue gas denitrification technology with the widest application, the highest market share and the most stable and reliable operation in the world. 3 The following reaction occurs: 4NH 3 +4NO+O 2 →4N 2 +6H 2 O; while the core technology of SCR technology is catalyst, its catalytic performance directly determines the denit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/34B01J37/10B01J37/00B01J37/08B01D53/86B01D53/56
CPCB01J23/8892B01J23/002B01J37/342B01J37/349B01J37/10B01J37/0018B01J37/082B01D53/8628B01D2257/404B01D2258/0283B01J2523/00B01J2523/72B01J2523/845B01J2523/847
Inventor 刘恒芳
Owner 运城市锦汇化工有限公司
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