Application of Manganese Oxide Composite Activated Carbon Material in Nitrogen Removal

A technology of composite activated carbon and manganese oxide, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc.

Active Publication Date: 2019-08-30
苏州艾斯特环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 It can only use ultraviolet light, which accounts for about 4% of solar energy, for TiO 2 Doping and developing Fe 2 o 3 、WO 3 、Bi 2 WO 6 Although some new catalysts have partially solved the problem of utilizing visible light, infrared light, which accounts for nearly 50% of solar energy, still needs to be developed and utilized.

Method used

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  • Application of Manganese Oxide Composite Activated Carbon Material in Nitrogen Removal
  • Application of Manganese Oxide Composite Activated Carbon Material in Nitrogen Removal

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) AC-α-MnO 2 Preparation: Weigh manganese chloride and potassium permanganate (molar ratio is 3:2), and dissolve in 20mL deionized water respectively, add 5% activated carbon of manganese dioxide theoretical yield in the manganese chloride solution, ultrasonic Transfer to a three-necked flask for 1 hour, heat to 85°C in a water bath, and dropwise add potassium permanganate, reflux the condenser tube for 12h, then filter and wash, and vacuum-dry at 70°C for 12h to obtain the activated carbon-α-manganese dioxide Nanocomposite photocatalysts.

[0039] (2) Photocatalysis experiment: Wrap the wall of a 100ml beaker with tin foil to prevent ultraviolet light and visible light from entering the reaction system, and cover the mouth of the beaker with a λ>780nm cut-off filter to ensure that only near-infrared light is present. The radiation enters the photoreactor, and a 300W UV-Vis lamp is placed above the reactor. Add a certain concentration of ammonia nitrogen solution in...

Embodiment 2

[0045] AC-β-MnO 2 Preparation: Weigh manganese chloride and potassium permanganate (molar ratio is 3:2), dissolve them in 20mL deionized water respectively, then add 5% activated carbon of manganese dioxide theoretical yield to the manganese chloride solution, and ultrasonicate for 1 hour , add potassium permanganate solution, stir for 30min, transfer to a 100ml reaction kettle, heat at 160°C for 12h, cool to room temperature, filter and wash, and dry at 70°C for 12h under vacuum to obtain the activated carbon-β- Manganese dioxide nano-hybrid photocatalyst.

[0046] (2) Photocatalysis experiment: Wrap the wall of a 100ml beaker with tin foil to prevent ultraviolet light and visible light from entering the reaction system, and cover the mouth of the beaker with a λ>780nm cut-off filter to ensure that only near-infrared light is present. The radiation enters the photoreactor, and a 300W UV-Vis lamp is placed above the reactor. Add a certain concentration of ammonia nitrogen so...

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Abstract

The invention discloses an application of a manganese oxide composite activated carbon material in denitrification. The application comprises: under a near infrared condition, the manganese oxide composite activated carbon material is used as a photocatalyst to degrade ammonia nitrogen into N2 and H2O. According to the application disclosed by the invention, the manganese oxide composite activated carbon material is used as a catalyst and has functions of molecular recognition and infrared photocatalytic degradation of the ammonia nitrogen, and can degrade the ammonia nitrogen into N2 and H2O under near infrared light, and after catalyzing degradation of the ammonia nitrogen for 5-10 times repeatedly, the catalyst still can enable the degradation rate of the ammonia nitrogen to be more than 90%.

Description

technical field [0001] The invention relates to a manganese oxide composite activated carbon material and its application in catalytic degradation of ammonia nitrogen by using near-infrared light. Background technique [0002] Using solar energy to solve environmental energy problems originated in 1972 when Fujishima used TiO 2 Photoelectrode electrolysis of water to produce hydrogen, followed by Carey in 1976 reported the use of TiO 2 Photocatalytic oxidation eliminates the toxicity of polychlorinated diphenols. Since then, the use of solar energy to degrade environmental pollutants has rapidly become a research hotspot. However, TiO 2 It can only use ultraviolet light, which accounts for about 4% of solar energy, for TiO 2 Doping and developing Fe 2 o 3 、WO 3 、 Bi 2 WO 6 Although some new catalysts such as X-rays have partially solved the problem of utilizing visible light, infrared light, which accounts for nearly 50% of solar energy, still needs to be developed a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34C02F1/30C02F101/16
CPCC02F1/30B01J23/34C02F2101/16C02F2305/10B01J35/39
Inventor 刘守清朱晓雷
Owner 苏州艾斯特环境科技有限公司
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