A kind of bean dregs-based porous carbon material, preparation method and application thereof

A technology of bean dregs and porous carbon, applied in the field of materials, can solve the problems of cumbersome preparation process, low adsorption efficiency, and low energy content, and achieve the effect of rich and developed pore structure, large pore diameter and pore volume, and wide source of raw materials

Active Publication Date: 2022-02-08
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its use is limited due to its high cost, so researchers search for low-cost adsorbent materials to replace activated carbon
The adsorption materials and preparation methods for dye wastewater in the prior art have disadvantages such as cumbersome preparation process, high energy consumption, low adsorption efficiency, non-recyclable utilization, and easy to cause secondary pollution.
[0005] Okara is a by-product of processing soybean products. my country is currently one of the countries with the largest production of okara in the world. It can produce about 20 million tons of wet okara every year. Due to the rough taste of okara, high moisture content, difficult storage, and low energy content, etc. The characteristics limit the further utilization of bean dregs
At present, except for animal feed, plant fertilizer or direct waste, it has not been effectively used

Method used

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  • A kind of bean dregs-based porous carbon material, preparation method and application thereof
  • A kind of bean dregs-based porous carbon material, preparation method and application thereof
  • A kind of bean dregs-based porous carbon material, preparation method and application thereof

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Effect test

Embodiment 1

[0033] A kind of preparation method of bean dregs-based porous carbon material, is characterized in that, comprises the following steps:

[0034] (1) Pass the bean dregs through a 200-mesh sieve after crushing, and dry at 80°C for later use;

[0035] (2) Pre-carbonize the bean dregs powder in the above step (1). This process includes putting the bean dregs powder to be treated in a corundum crucible, and putting the corundum crucible into a high-temperature tube furnace for calcination and pyrolysis. After evacuating the furnace, nitrogen gas is introduced, the gas purity is 99.99%, the gas flow rate is 80mL / min, the heating rate of calcination and pyrolysis is 10°C / min, and the temperature is raised to 500°C for constant temperature calcination, and the constant temperature is 45min. The final okara powder is cooled to room temperature, taken out, pickled with a mixed acid of 3wt% hydrofluoric acid and 5wt% hydrochloric acid, stirred and washed for 24 hours, washed with water...

Embodiment 2

[0039] A kind of preparation method of bean dregs-based porous carbon material, is characterized in that, comprises the following steps:

[0040] (1) Pass the bean dregs through a 200-mesh sieve after crushing, and dry at 105°C for later use;

[0041] (2) Pre-carbonize the bean dregs powder in the above step (1). This process includes putting the bean dregs powder to be treated in a corundum crucible, and putting the corundum crucible into a high-temperature tube furnace for calcination and pyrolysis. After evacuating the furnace, argon gas was introduced, the gas purity was 99.999%, the gas flow rate was 100mL / min, the heating rate of calcination and pyrolysis was 8°C / min, and the temperature was raised to 600°C for constant temperature calcination. The decomposed okara powder was cooled to room temperature and then taken out, pickled with 4wt% hydrochloric acid, stirred and washed for 24 hours, washed with water until neutral, vacuum filtered, and dried at 90°C to obtain pre...

Embodiment 3

[0045] A kind of preparation method of bean dregs-based porous carbon material, is characterized in that, comprises the following steps:

[0046] (1) Pass the bean dregs through a 200-mesh sieve after crushing, and dry at 100°C for later use;

[0047] (2) Pre-carbonize the bean dregs powder in the above step (1). This process includes putting the bean dregs powder to be treated in a corundum crucible, and putting the corundum crucible into a high-temperature tube furnace for calcination and pyrolysis. After evacuating the furnace, argon gas was introduced, the gas purity was 99.999%, the gas flow rate was 180mL / min, the heating rate of calcination and pyrolysis was 16°C / min, and the temperature was raised to 700°C for constant temperature calcination. The decomposed okara powder is cooled to room temperature, taken out, pickled with 6wt% hydrofluoric acid, stirred and washed for 24 hours, washed with water until neutral, vacuum filtered, and dried at 105°C to obtain pre-carbon...

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Abstract

The invention discloses a method for preparing a bean dregs-based porous carbon material, which comprises the following steps: (1) pretreating the bean dregs to obtain bean dregs powder; (2) calcining and pyrolyzing the bean dregs powder in the above step (1), and performing pre-carbonization treatment to obtain the pre-carbonized okara; (3) adding an activator to the pre-carbonized okara in the above step (2) for activation to obtain the okara-based porous carbon material. The present invention pre-carbonizes the pretreated bean dregs. In the process of calcining and pyrolysis, the volatilization of moisture and organic matter will form a certain pore structure. The well-developed pore structure and appropriate pore size and pore volume generate more active sites and improve the adsorption effect. The invention also provides a bean dregs-based porous carbon material, which has high specific surface area, large pore diameter and pore volume, strong adsorption capacity and large adsorption capacity. The present invention also provides the application of the above bean dregs-based porous carbon material for the treatment of dye wastewater.

Description

technical field [0001] The invention relates to the field of materials, in particular to a bean dregs-based porous carbon material, a preparation method and an application thereof. Background technique [0002] At present, with the rapid development of science and technology in our country, the scale of dyestuffs and printing and dyeing enterprises is growing day by day. Dyestuffs are widely used in textile, leather, paper, pharmaceutical, food, plastics and cosmetics industries. At the same time, a large amount of dye wastewater is produced in the process of production and use. The production wastewater in the printing and dyeing industry accounts for 30-40% of the total industrial wastewater. According to reports, every 1 ton of printing and dyeing textiles will consume 200 tons of water, 90% of which will become printing and dyeing wastewater. In addition, dye wastewater has the characteristics of high biological toxicity, high chroma, difficult biodegradation, strong r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/324C01B32/348B01J20/20C02F1/28
CPCC01B32/324C01B32/348B01J20/20C02F1/281C02F2101/308
Inventor 刘新旗应知伟李赫张弛
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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