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Preparation method of porous tea residue biochar with high specific surface area

A high specific surface area, biochar technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve problems such as limited membrane blockage and efficiency

Inactive Publication Date: 2020-10-30
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the action of microorganisms in the biochemical method will be inhibited, the membrane treatment method is limited by the clogging and efficiency of the membrane, and the photocatalytic degradation method is limited by the size of the reaction device

Method used

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  • Preparation method of porous tea residue biochar with high specific surface area
  • Preparation method of porous tea residue biochar with high specific surface area
  • Preparation method of porous tea residue biochar with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The concrete preparation operation steps of tea dregs biochar of a kind of porous high specific surface area are as follows:

[0039] (1) Raw material pretreatment

[0040] The discarded tea dregs taken from the tea factory were washed with water to remove impurities. After washing, the tea dregs were put into a blast drying oven for drying. The temperature of the blast drying oven was 100°C for 10 hours. 60 mesh sieve, save for future use.

[0041] (2) Hydrothermal treatment

[0042] Mix 3 grams of tea residue and 50 ml of pure water into a hydrothermal reaction kettle, react at 200°C for 8 hours, and separate the solid and liquid to obtain hydrothermal charcoal; the hydrothermal charcoal is washed three times with absolute ethanol, and the hydrothermal charcoal and The ratio of water to ethanol is 1:20; it is dried in a blast drying oven at a temperature of 100°C for 10 hours to obtain hydrothermal charcoal.

[0043] (3) Modifier impregnation treatment

[0044] Mix ...

Embodiment 2

[0052] The concrete preparation operation steps of tea dregs biochar of a kind of porous high specific surface area are as follows:

[0053] (1) Raw material pretreatment

[0054] The waste tea dregs taken from the tea factory were washed with water to remove impurities. After washing, the tea dregs were put into a blast drying oven for drying. The temperature of the blast drying oven was 105°C and the time was 15 hours. 70 mesh sieves are stored for future use.

[0055] (2) Hydrothermal treatment

[0056] Mix 4 grams of tea residue and 65 ml of pure water into a hydrothermal reaction kettle, react at 200°C for 9 hours, separate solid and liquid to obtain hydrothermal charcoal, wash hydrothermal charcoal with absolute ethanol three times, hydrothermal charcoal and anhydrous The ratio of water to ethanol is 1:20, and it is dried in a blast drying oven at a temperature of 105°C for 15 hours to obtain hydrothermal charcoal.

[0057] (3) Modifier impregnation treatment

[0058...

Embodiment 3

[0065] The concrete preparation operation steps of tea dregs biochar of a kind of porous high specific surface area are as follows:

[0066] (1) Raw material pretreatment

[0067] The discarded tea dregs taken from the tea factory were washed with water to remove impurities. After washing, the tea dregs were put into a blast drying oven for drying. The temperature of the blast drying oven was 105°C for 24 hours. 80 mesh sieves are stored for future use.

[0068] (2) Hydrothermal treatment

[0069] Mix 5 grams of tea residue and 80 milliliters of pure water into a hydrothermal reaction kettle, react at 200°C for 10 hours, separate solid and liquid to obtain hydrothermal charcoal, wash hydrothermal charcoal with absolute ethanol three times, hydrothermal charcoal and The ratio of water to ethanol is 1:20, and it is dried in a blast drying oven at a temperature of 105°C for 24 hours to obtain hydrothermal charcoal.

[0070] (3) Modifier impregnation treatment

[0071] Mix hyd...

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Abstract

The invention discloses a preparation method of porous tea residue biochar with a high specific surface area, and belongs to the field of resource reutilization of product processing wastes. Potassiumbicarbonate is used as a modifier. The method comprises the steps: washing tea residues with hot water, drying and crushing; secondly, carrying out hydro-thermal treatment on the tea residues; dryinga tea residue hydrothermal carbon solid after hydrothermal treatment; then soaking and uniformly mixing the hydrothermal carbon and potassium bicarbonate; after drying, putting the mixture into a tubular muffle furnace for pyrolysis; and carrying out acid washing, water washing, drying and ball milling on the carbonized product after pyrolysis to obtain the tea residue biochar, wherein the prepared tea residue biochar has a developed pore structure and a large specific surface area, the specific surface area is 1278-1405 m<2> / g, and the pore volume is 0.6734-0.8067 cm<3> / g. The tea residue biochar has a good removal effect on tetracycline in a water body, and the adsorption capacity of the tea residue biochar on tetracycline in the water body can reach 429-478 mg / g.

Description

technical field [0001] The invention belongs to the field of resource recycling of product processing waste, and specifically designs a method for tea dregs biochar with a porous high specific surface area and its product and application. Background technique [0002] China is a big country in tea production and consumption. With the rapid development of the tea consumption market, my country's annual tea production has reached more than 2 million tons. After the production or application of tea, a large amount of tea dregs will be produced. How to recycle the waste of tea dregs has become a hot spot in the tea industry and the field of ecological environmental protection. [0003] Currently, biochar refers to a class of carbon-rich, highly aromatized solid substances produced by low-temperature (<700°C) pyrolysis of biomass under complete or partial anoxic conditions. Because of its wide source of raw materials, large specific surface area, well-developed pores, rich in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38
CPCB01J20/20B01J20/28045B01J20/28066B01J20/28073C02F1/283C02F2101/38
Inventor 范世锁李斌梅杨璐王毅王振唐俊
Owner ANHUI AGRICULTURAL UNIVERSITY
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