Method for preparing nitrogen-containing porous carbon by using recycled waste carbon and production and application thereof

A technology of porous carbon and waste activated carbon, which is applied in the preparation of carbon-based compounds, chemical instruments and methods, preparation of organic compounds, etc., can solve the problems of unrecoverable catalysts, large corrosion of reaction equipment, and high production costs, and achieves a simple preparation method. Ease of operation, lower recycling costs, and the effect of lowering recycling costs

Active Publication Date: 2016-11-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most of the industry uses water vapor activation, KOH and ZnCl 2 Other activators, the temperature required for water vapor activation is relatively high (≥1000°C), and the energy consumption is relatively large, while KOH and ZnCl 2 The corrosion of the reaction equipment is relatively large and the catalyst cannot be recovered, so the production cost is relatively high

Method used

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  • Method for preparing nitrogen-containing porous carbon by using recycled waste carbon and production and application thereof
  • Method for preparing nitrogen-containing porous carbon by using recycled waste carbon and production and application thereof
  • Method for preparing nitrogen-containing porous carbon by using recycled waste carbon and production and application thereof

Examples

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Effect test

Embodiment 1

[0038] Embodiment 1: The waste charcoal produced in the decolorization process in the biotin production process is used as raw material.

[0039] Weigh 2g of spent activated carbon, 8g of sodium bicarbonate and 8g of ammonium oxalate, transfer them to a 30ml crucible after mechanical mixing, and then calcine them in a nitrogen furnace. The steps of calcining are: heating up to 900°C at 15°C / min, calcining at 900°C for 1 hour; then cooling down to room temperature naturally. The calcined product was ground, mixed with deionized water, filtered after standing for 24 hours, the precipitate was washed until neutral, and dried to obtain the nitrogen-containing porous carbon material.

[0040] The SEM and TEM images of the nitrogen-containing porous carbon material prepared in this example are as follows figure 1 , 2 Shown:

[0041] Observed figure 1 It can be seen that the surface of the activated carbon material contains some pores, and its microporous structure can be determi...

Embodiment 2

[0060] Embodiment 2: Taking the waste activated carbon after the decolorization of the sugar industry as raw material

[0061] Weigh 2g of spent activated carbon and mechanically mix with 8g of sodium bicarbonate and 8g of potassium oxalate, then transfer to a 30ml crucible. Calcination is then carried out in a nitrogen furnace. The calcining steps are: heating up to 900°C at 15°C / min, calcining at 900°C for 1 hour; then cooling down to room temperature naturally. Grind the calcined mixture, then wash with 300ml deionized water, filter after 24h, wash until neutral, and dry to obtain a nitrogen-containing porous carbon material. Its scanning electron microscope (SEM) image is as Figure 7 shown.

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Abstract

The invention discloses a method for preparing nitrogen-containing porous carbon by using recycled waste carbon. The method comprises the following steps: taking waste activated carbon as a raw material; after mixing the waste activated carbon with a composite activating agent, heating and calcining, mixing a calcined product with deionized water, standing for depositing, and filtering to obtain precipitate; and carrying out aftertreatment to obtain the nitrogen-containing porous carbon. The composite activating agent comprises a component A and a component B, the component A is sodium bicarbonate, and the component B is a nitrogen-containing compound. In the method for activating and regenerating the waste activated carbon by using the composite activating agent to obtain a nitrogen-containing porous carbon material, the activating agent is recycled simultaneously, and the recycling cost is greatly reduced. The preparation method is simple and easy to operate, an existing activated carbon generating process can be utilized directly, the recycled carbon material not only has abundant adsorption performance and can be used in dye wastewater, but also can serve as a catalyst carrier to prepare a high-performance catalyst, and the additional value of the waste activated carbon is greatly increased.

Description

technical field [0001] The invention belongs to the field of recycling waste activated carbon, and in particular relates to a method for preparing nitrogen-containing porous carbon by using recycled waste carbon, as well as its product and application. Background technique [0002] Activated carbon has a large specific surface area and developed pores, and is a commonly used adsorbent in daily life and industrial production. In daily life, activated carbon is generally used to adsorb harmful gases or to purify drinking water. In the field of industrial applications, activated carbon plays an important role in many process conditions, mainly used for the purification of harmful gases, decolorization and deodorization of products. During use, activated carbon will lose its adsorption capacity due to adsorption saturation, and is generally discarded as waste, incinerated or landfilled. [0003] Directly from activated carbon precursors, such as biomass or petroleum industry p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/12B01J27/24C07C45/00C07C49/403C02F1/28C02F101/30
CPCB01J27/24C01P2004/03C01P2004/04C01P2006/12C01P2006/17C02F1/281C02F1/283C02F2101/308C07C45/006C07C49/403
Inventor 王勇邓江李建清汤明慧李名明
Owner ZHEJIANG UNIV
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