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Method for preparing nano biochar

A biochar and nanotechnology, applied in the fields of biofuel, special dry distillation, petroleum industry, etc., can solve the problems of a large amount of smog, air pollution, and high loss rate of nano-scale biochar, and achieve the goal of reducing loss and increasing output rate Effect

Pending Publication Date: 2020-05-26
SUN YAT SEN UNIV
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Problems solved by technology

Nano-scale biochar can also be obtained by traditional biomass combustion method plus dry ball milling, but the loss rate of nano-scale biochar is high, the yield is low, and a large amount of smoke is generated, which seriously pollutes the air environment

Method used

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  • Method for preparing nano biochar
  • Method for preparing nano biochar

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Embodiment

[0023] First, please refer to Figure 1-2 , with regard to a method for producing nano-biochar by using straws in an embodiment of the present invention:

[0024] S1) Dry the rice straw at 60°C for 48 hours, crush it into a muffle furnace, keep burning at 550°C for 2 hours, grind and sieve (100 mesh) after calcining, and dry to obtain biochar powder;

[0025] S2) Put the sieved biochar powder into a ball mill, add ultrapure water just to wet the sample, use a ball mill to wet-grind for 72 hours, freeze it in a -80°C refrigerator after grinding, and freeze and air-dry it with a lyophilizer to obtain biochar. carbon sample;

[0026] S3) Take 7.5 g of the frozen and air-dried biochar sample and add it to a beaker containing 500 ml of ultrapure water. After stirring gently, use an ultrasonic cell disruptor (660W, model JY98-IIIDN) to sonicate the biochar sample for 30 minutes To stably disperse the biochar suspension;

[0027] S4) Take 40ml of the biochar suspension in each of ...

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Abstract

The invention discloses a method for quickly preparing a large amount of nano biochar, which reduces the loss of biochar nanoparticles, increases the yield of nano biochar, and purifies biochar suspension by reverse osmosis to obtain high-purity nano biochar particles for quickly preparing a large amount of biochar nanoparticles.

Description

technical field [0001] The invention relates to the field of biomass energy, in particular to a method for producing nano biochar. Background technique [0002] According to the definition of the International Biochar Initiative (IBI), biochar (biochar) is a substance formed by high-temperature pyrolysis of biomass under anoxic conditions, and these substances are applied to the soil to obtain agricultural and environmental benefits. A large number of studies in recent years have shown that the application of biochar in the soil can effectively sequester CO2 in the atmosphere, and can be used in many aspects (pH, CEC, nutrient use efficiency, water use efficiency, bioavailability of heavy metals and organic pollutants, etc.) ) improve soil quality and increase crop yields. It is estimated that the global agricultural soil sequestration of biochar can be as high as 428 billion tons. Therefore, there will be a huge global market demand for biochar for agriculture in the futu...

Claims

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Application Information

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IPC IPC(8): C10B53/02
CPCC10B53/02Y02E50/10
Inventor 黄彩怡张妙月赵曼丰灿戴湲丁铿博尹威仇荣亮
Owner SUN YAT SEN UNIV
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