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Preparation method of macadimia nut shell biochar

A technology of biochar and nut shells, applied in chemical instruments and methods, ion exchange regeneration, chemical/physical processes, etc., can solve problems such as poor quality and poor adsorption capacity, and achieve the effect of improving quality and improving adsorption capacity

Pending Publication Date: 2022-01-04
YUNNAN INST OF TROPICAL CROPS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology, a large number of discarded macadamia nut shells will be made into nut shell biochar, and the original macadamia nut shell biochar in the prior art has no effect on pb in aqueous solution 2+ and Cd 2+ The adsorption capacity of macadamia nut shell is relatively poor, resulting in the relatively poor quality of the original macadamia nut shell biochar product. The invention proposes a method for preparing macadamia nut shell biochar

Method used

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  • Preparation method of macadimia nut shell biochar
  • Preparation method of macadimia nut shell biochar
  • Preparation method of macadimia nut shell biochar

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Embodiment 1

[0033] Such as Figure 1 to Figure 6 Shown, the preparation method of a kind of macadamia nut shell biochar of the present invention, the method comprises the following steps:

[0034] S1: After air-drying the discarded macadamia nut shells for one week, place them in an oven at 65°C and dry them to constant weight;

[0035] S2: Select an appropriate amount of dried macadamia nut shells to fill a quartz boat, put them into a tube furnace, perform pyrolysis treatment in an oxygen-deficient environment, and cool to room temperature to obtain macadamia nut shell biochar;

[0036] S3: Crush and sieve the macadamia nut shell biochar, take the biochar material with a particle size of 1 mm, dry it, and store it in a sealed container for later use;

[0037] S4: performing nano-magnesia modification on the biochar material prepared in S3 to obtain nano-magnesia-loaded biochar.

[0038] As an embodiment of the present invention, in the above S2, the anoxic environment in the tube furn...

Embodiment approach

[0039] As an embodiment of the present invention, in said S4, the nano-magnesia modification treatment method comprises the following steps:

[0040] A1: Mixed and dried macadamia nut shell biochar, magnesium chloride solution and ammonia water mixture (nano-magnesium hydroxide impregnation solution) in proportion;

[0041] A2: Prepare nano-magnesium hydroxide impregnation solutions with different concentration gradients by using different amounts of ammonia water;

[0042] A3: Filtrate the homogeneously mixed macadamia nut biochar and nano-magnesium hydroxide impregnation solution to obtain a biochar material;

[0043] A4: Take the biochar material prepared in A3 and dry it in an oven to constant weight, put it in a quartz boat and put it into a tube furnace for high-temperature pyrolysis treatment to obtain nano-magnesia-loaded biochar.

[0044] As an embodiment of the present invention, in the A1, the dried macadamia nut shell biochar, magnesium chloride solution and ammon...

Embodiment 2

[0050] Such as Figure 1 to Figure 6 Shown, the preparation method of a kind of macadamia nut shell biochar of the present invention, the method comprises the following steps:

[0051] S1: After air-drying the discarded macadamia nut shells for one week, place them in an oven at 65°C and dry them to constant weight;

[0052] S2: Select an appropriate amount of dried macadamia nut shells to fill a quartz boat, put them into a tube furnace, perform pyrolysis treatment in an oxygen-deficient environment, and cool to room temperature to obtain macadamia nut shell biochar;

[0053] S3: Crush and sieve the macadamia nut shell biochar, take the biochar material with a particle size of 1 mm, dry it, and store it in a sealed container for later use;

[0054] S4: performing nano-magnesia modification on the biochar material prepared in S3 to obtain nano-magnesia-loaded biochar.

[0055]As an embodiment of the present invention, in the above S2, the anoxic environment in the tube furna...

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Abstract

The invention belongs to the technical field of biochar, and particularly relates to a preparation method of macadamia nut shell biochar. The preparation method comprises the following steps: S1, air-drying selected waste macadamia nut shells for one week, and drying the macadamia nut shells in a drying oven at the temperature of 65 DEG C until the weight of the macadamia nut shells is constant; S2, selecting a proper amount of the dried macadamia shells to fill the quartz boat, putting the quartz boat into a tubular furnace, performing pyrolysis treatment in an anoxic environment, and cooling to room temperature to obtain macadamia shell biochar; and S3, crushing and sieving macadamia nut shell biochar, drying a biochar material with the particle size of 0.15-1 mm, and sealing and storing for later use. The waste macadimia nut shells are treated in a traditional mode and prepared into the macadimia nut shell biochar, nano magnesium oxide modification treatment is conducted on the macadimia nut shell biochar, nano magnesium oxide loaded biochar is prepared, the quality of the macadimia nut shell biochar is further improved, and the adsorption capacity of the nanometer magnesium oxide loaded biochar on Pb<2+> and Cd<2+> in an aqueous solution is improved to a certain degree.

Description

technical field [0001] The invention belongs to the technical field of biochar, in particular to a preparation method of macadamia nut shell biochar. Background technique [0002] Biochar is a product obtained by pyrolysis of waste biomass materials. Its main component is carbon molecules, and biochar has broad application prospects in agriculture. [0003] Macadamia nuts, also known as macadamia nuts, are nuts with high nutritional value. As a by-product of processing, macadamia nut shells are hard and can be used as raw materials for the preparation of activated carbon and biochar. [0004] In the existing technology, due to the sharp increase in the planting area and harvesting area of ​​macadamia nuts, the output of macadamia nuts will also increase exponentially. After processing, a large amount of macadamia nut shells will be produced, and some discarded macadamia nut shells will be made into nut shell biochar. However, the original macadamia nut shell biochar in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D15/08
CPCB01J20/20B01J20/041B01J20/3078B01D15/08B01J2220/4887
Inventor 耿建建贺熙勇陶亮李志强岳海宫丽丹吴超马静
Owner YUNNAN INST OF TROPICAL CROPS