Preparation method and application of co-pyrolyzed biochar of pig bones and bamboo wood

A co-pyrolysis and biochar technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve the problems of mixed wastewater treatment without co-pyrolysis biochar, and achieve enhanced physical adsorption effect, repeatable The effect of high rate and easy availability of raw materials

Active Publication Date: 2019-06-21
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, there is no research on the use of bone charcoal and bamboo for co-pyrolysis to

Method used

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  • Preparation method and application of co-pyrolyzed biochar of pig bones and bamboo wood
  • Preparation method and application of co-pyrolyzed biochar of pig bones and bamboo wood
  • Preparation method and application of co-pyrolyzed biochar of pig bones and bamboo wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for preparing pig bone and bamboo co-pyrolysis biochar, comprising the following steps:

[0036] 1: Remove impurities, stir and scald the obtained bamboo and pig bones in hot water at 80-100°C to remove impurities;

[0037] 2: drying, the bamboo and pork bones after the impurities are placed in an oven at 105°C for drying;

[0038] 3: Grinding. Grinding the dried bamboo and pig bones with a universal grinder, the grinding time is 1-2min, and the interval is 1-2min. Repeat this 20-30 times to make bone powder and bamboo with a particle size of 130-150μm. Powder, as the raw material of adsorbent;

[0039] 4: Pyrolysis, the prepared bamboo powder and pig bone powder are mixed at a mass ratio of 2:3 and then co-pyrolyzed in a vacuum tube furnace at 550°C in a nitrogen atmosphere for 2-2.5h, and the heating rate is 10°C / min, the nitrogen gas flow rate was 50mL / min, and then it was naturally cooled to room temperature and taken out to obtain co-pyrolysis biochar. ...

Embodiment 2

[0041] A method for preparing pig bone and bamboo co-pyrolysis biochar, comprising the following steps:

[0042]1: Remove impurities, stir and scald the obtained bamboo and pig bones in hot water at 80-100°C to remove impurities;

[0043] 2: drying, the bamboo and pork bones after the impurities are placed in an oven at 120°C for drying;

[0044] 3: Grinding. Grinding the dried bamboo and pig bones with a universal grinder, the grinding time is 1-2min, and the interval is 1-2min. Repeat this 20-30 times to make bone powder and bamboo with a particle size of 110-130μm. Powder, as the raw material of adsorbent;

[0045] 4: Pyrolysis, mix the prepared bamboo powder and pig powder with a mass ratio of 3:7, and then carry out co-pyrolysis in a vacuum tube furnace at 700°C in a nitrogen atmosphere for 2-2.5h, and the heating rate is 7°C / min , the nitrogen gas flow rate was 40mL / min, and then it was naturally cooled to room temperature and then taken out to obtain co-pyrolysis bioc...

Embodiment 3

[0047] A method for preparing pig bone and bamboo co-pyrolysis biochar, comprising the following steps:

[0048] 1: Remove impurities, stir and scald the obtained bamboo and pig bones in hot water at 80-100°C to remove impurities;

[0049] 2: drying, the bamboo and pork bones after the impurities are placed in an oven at 80°C for drying;

[0050] 3: Grinding. Grinding the dried bamboo and pig bones with a universal grinder, the grinding time is 1-2min, and the interval is 1-2min. Repeat this 20-30 times to make bone powder and bamboo with a particle size of 75-100μm. Powder, as the raw material of adsorbent;

[0051] 4: Pyrolysis, mix the prepared bamboo powder and pig powder with a mass ratio of 1:3, and then carry out co-pyrolysis in a vacuum tube furnace at 600°C in a nitrogen atmosphere for 2-2.5h, and the heating rate is 8°C / min , the rate of nitrogen gas feeding was 60mL / min, and then it was naturally cooled to room temperature and then taken out to obtain co-pyrolysis...

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Abstract

The invention relates to the technical field of biochar, in particular to a preparation method and application of co-pyrolyzed biochar of pig bones and bamboo wood. The preparation method comprises the following steps: (1) impurity removal: stirring and scalding the pig bones and the bamboo wood respectively in water of a certain temperature to remove impurities; (2) drying: drying the pig bones and bamboo wood after the impurities are removed at a certain temperature; (3) pulverizing: pulverizing the dried pork bones and bamboo wood respectively to obtain pork bone powder and bamboo powder; (4) co-pyrolysis: mixing the prepared pork bone powder with the bamboo powder in a certain ratio, then co-pyrolyzing at a certain temperature, and then cooling to room temperature to obtain the co-pyrolyzed biochar. The preparation method provided by the invention is simple, the raw materials are easy to obtain, the method is high in stability, the repeatability is high, the industrial production is facilitated, and the prepared co-pyrolyzed biochar of the pig bones and the bamboo wood combines the advantages of bone charcoal and bamboo charcoal, so that the effect of effectively treating mixedwastewater can be realized, and the effect is higher than that of single bone charcoal or bamboo charcoal.

Description

technical field [0001] The invention relates to the technical field of biochar, in particular to a method for preparing biochar by co-pyrolyzing pig bones and bamboo and its application. Background technique [0002] Biochar (Biochar is a carbonaceous material produced by pyrolysis of biomass under complete or partial anoxic conditions. Biochar is rich in carbon and has a developed pore structure, which brings it a large specific surface area and ion exchange Due to its high physical and chemical properties, it is considered to be an efficient adsorption material. [0003] Bone black is a kind of amorphous carbon, containing 7%-11% carbon, about 80% calcium phosphate and other inorganic salts. It is produced by carbonization in multiple processes such as sorting. Hydroxyapatite extracted from bone char can remove heavy metals very effectively. Its advantage lies in its ability to eliminate the negative effects of hardness in water, thereby eliminating heavy metals. With ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 刘艳艳毛卫康
Owner WUHAN UNIV OF TECH
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