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Method for preparing active carbon loaded with manganese oxide by hydrothermal method and device thereof

A manganese oxide and activated carbon technology is applied in the field of hydrothermal preparation of supported manganese oxide activated carbon, which can solve the problems of high cost, complex manufacturing process, influence on large-scale application, etc., and achieves a high degree of automation, simple operation and good economic benefits. effect on environmental benefits

Active Publication Date: 2017-11-17
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complex manufacturing process and high cost of ACF, it affects its large-scale application

Method used

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  • Method for preparing active carbon loaded with manganese oxide by hydrothermal method and device thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Prepare modified activated carbon according to the following steps:

[0039] (a) impregnate vacuum-dried activated carbon with a particle size of 2 / g, the molar concentration of potassium permanganate solution is 0.010mol / L, after ultrasonic vibration, obtain the activated carbon impregnated and adsorbed potassium permanganate;

[0040] (b) Add the activated carbon impregnated and adsorbed potassium permanganate in the same volume in the previous step, and join the mixed solution of manganese nitrate and nitric acid into the hydrothermal crystallization device, and react the quality of the activated carbon impregnated and adsorbed potassium permanganate in a medium volume: nitric acid The quality of the mixed solution of manganese and nitric acid is 1:3. The mixed solution of manganese nitrate and nitric acid is mixed with manganese nitrate solution and nitric acid solution according to the volume ratio of 3:4, wherein the molar concentration of manganese nitrate soluti...

Embodiment 2

[0045] (a) impregnating activated carbon with vacuum-dried particle size2 / g, the molar concentration of potassium permanganate solution is 0.1mol / L, after ultrasonic vibration, obtain the activated carbon impregnated and adsorbed potassium permanganate;

[0046](b) The activated carbon impregnated and adsorbed potassium permanganate in the previous step is added to the hydrothermal crystallization device together with the mixed solution of manganese nitrate and nitric acid, and the mass of the activated carbon impregnated and adsorbed potassium permanganate in the reaction medium volume is: manganese nitrate and The quality of the mixed solution of nitric acid is 1:4. The mixed solution of manganese nitrate and nitric acid is mixed with manganese nitrate solution and nitric acid solution according to the volume ratio of 3:4, wherein the molar concentration of manganese nitrate solution is 0.1mol / L , the molar concentration of the nitric acid solution is 7.75mol / L; the temperat...

Embodiment 3

[0051] (a) Vacuum-dried activated carbon with a particle size of 2 / g, the molar concentration of potassium permanganate solution is 0.05mol / L, after ultrasonic vibration, obtain the activated carbon impregnated and adsorbed potassium permanganate;

[0052] (b) The activated carbon impregnated and adsorbed potassium permanganate in the previous step is added to the hydrothermal crystallization device together with the mixed solution of manganese nitrate and nitric acid, and the mass of the activated carbon impregnated and adsorbed potassium permanganate in the reaction medium volume is: manganese nitrate and The quality of the mixed solution of nitric acid is 1:5, and the mixed solution of manganese nitrate and nitric acid is mixed with manganese nitrate solution and nitric acid solution according to the volume ratio of 3:4, wherein the molar concentration of manganese nitrate solution is 0.05mol / L , the molar concentration of the nitric acid solution is 7.75mol / L; the temperat...

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Abstract

The invention relates to a method for preparing active carbon loaded with manganese oxide by a hydrothermal method and a device thereof. The method comprises the following steps: firstly carrying out equivalent-volume impregnation on vacuumdryingactive carbon and potassium permanganate solution, then putting the active carbon, the potassium permanganate solution and mixed solution of manganese nitrate and nitric acid together into a hydrothermal crystallization device for reaction, cooling and separating obtained solid-liquid mixture, washing and drying solid-phase products, calcining in inertial gas to obtain modified active carbon powder loaded with the manganese oxide; and the modified active carbon powder has good property in low-temperature NO catalytic oxidation, and the conversion rate is 48.5%-58.3%. The invention also discloses the device for implementing the method for preparing the active carbon loaded with the manganese oxide by the hydrothermal method. The equipment is high in automation degree, clean in production process, simple in process and low in cost.

Description

technical field [0001] The invention relates to the field of industrial waste gas treatment, in particular to a method and a device for preparing activated carbon loaded with manganese oxide by a hydrothermal method. Background technique [0002] Nitrogen oxides are an important class of air pollutants. With the increasing trend of nitrogen oxide emissions year by year, how to reduce nitrogen oxide emissions has become an important environmental problem that needs to be solved urgently. [0003] As the core of absorption denitrification technology, NO catalytic oxidation has received more and more attention. High concentration NO is easily oxidized to NO 2 , but low concentrations of NO (<1000ppm) tend to exist stably because it is difficult to be oxidized and insoluble in water or alkali. NO catalytic oxidation method is to use NO 2 and N 2 o 3 Easily soluble in water or alkali, use catalyst to oxidize NO to NO under oxygen-containing conditions 2 To obtain rapid r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/372C01B21/36B01D53/86B01D53/56
CPCB01D53/8628C01B21/36B01D2258/02Y02A50/20
Inventor 余广炜尤甫天汪印
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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