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Secondary activated pomelo peel biochar material, preparation method thereof and application of biochar material in adsorption of acetone

A secondary activation, biochar technology, applied in chemical instruments and methods, carbon compounds, separation methods, etc., to achieve the effects of reuse, low price, and high yield

Pending Publication Date: 2022-03-01
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology often adopts a single high-temperature burning method to prepare pomelo peel activated carbon, and it is difficult to completely avoid the generation of tar

Method used

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  • Secondary activated pomelo peel biochar material, preparation method thereof and application of biochar material in adsorption of acetone
  • Secondary activated pomelo peel biochar material, preparation method thereof and application of biochar material in adsorption of acetone
  • Secondary activated pomelo peel biochar material, preparation method thereof and application of biochar material in adsorption of acetone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Pretreatment of pomelo peel: peel off the purchased pomelo peel, take its white part and cut it into small pieces, soak it in deionized water for 30 minutes, repeat three times, then squeeze out the water, and put it in the cold trap of vacuum freeze dryer Freeze in the middle for 8 hours, and then place it in the upper tray for vacuum freeze-drying for 36 hours to obtain the pretreated pomelo peel;

[0029] (2) Preparation of preliminary activated pomelo peel: Put 2 g of pretreated pomelo peel into the liner of a 100mL hydrothermal reaction kettle, add 60mL of deionized water, seal it and place it in a blast drying oven at 160°C for water treatment. Heat the reaction for 10 hours, wash with deionized water after the end, and dry to obtain the preliminary activated pomelo peel;

[0030] (3) Preparation of ZnCl 2 solution; take 1g of anhydrous ZnCl 2 Dissolve in 50mL deionized water, stir for 10min to completely dissolve;

[0031] (4) Preparation of secondary acti...

Embodiment 2

[0033] The method is basically the same as in Example 1, the difference is only that: the preparation of ZnCl 2 solution, anhydrous ZnCl 2 The amount increased from 1g to 2g, and the other steps remained unchanged, so the preliminary activation of pomelo peel and ZnCl 2 The mass ratio is changed from 1:1 to 1:2.

Embodiment 3

[0035] The method is basically the same as in Example 1, the difference is only that: the preparation of ZnCl 2 solution, anhydrous ZnCl 2 The amount increased from 1g to 3g, and the other steps remained unchanged, so the initial activation of pomelo peel and ZnCl 2 The mass ratio is changed from 1:1 to 1:3.

[0036] figure 1It is the physical picture of dried pomelo peel, primary activation of pomelo peel by water heat and secondary activation of pomelo peel biochar by zinc chloride. After hydrothermal activation, the color of pomelo peel (a) changes from white to yellowish brown (b), which is caused by the carbonization of part of the biomass in pomelo peel under high temperature and pressure. Pomelo peel biochar doped with zinc chloride was completely carbonized after secondary activation at high temperature (b), and the color changed from yellowish brown to black completely.

[0037] figure 2 SEM images of dry pomelo peel, primary hydrothermal activation of pomelo pe...

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Abstract

The invention discloses a secondarily activated pomelo peel biochar material, a preparation method thereof and application of the secondarily activated pomelo peel biochar material to adsorption of acetone, the method adopts a secondary activation method to treat pomelo peel, firstly, the pretreated pomelo peel is primarily activated by a hydrothermal method, and a large number of oxygen-containing functional groups are generated through hydrolysis; the preparation method comprises the following steps: firstly, preliminarily activating the shaddock peel biochar, then dipping the preliminarily activated shaddock peel biochar in a ZnCl2 solution to fully disperse ZnCl2 on the surface of the shaddock peel biochar, and finally, activating the shaddock peel biochar dipped with ZnCl2 again at high temperature in an inert gas atmosphere, so that the obtained shaddock peel biochar has a remarkably enhanced adsorption effect on acetone, and the adsorption capacity is 4 times that of commercial activated carbon.

Description

technical field [0001] The invention belongs to the technical field of volatile organic matter adsorption materials, and relates to a novel biochar material, in particular to a secondary activated pomelo peel biochar material, a preparation method thereof and an application for adsorbing acetone. Background technique [0002] Volatile organic compounds (VOCs) are precursors to the formation of photochemical smog and haze, most of which are toxic and carcinogenic. Among them, acetone is a VOC that has an anesthetic effect on the nervous system, and high-concentration exposure can cause damage to the liver, kidney, brain and nervous system of humans. At present, VOC removal technologies include adsorption, photocatalytic oxidation, low-temperature plasma treatment, thermal combustion, catalytic combustion, etc. Compared with the above prior art, adsorption is widely regarded as an effective method for removing VOCs because of their simple operation and low cost. [0003] Bio...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324B01J20/20B01D53/02B01J20/30
CPCC01B32/348C01B32/324B01J20/20B01D53/02B01J2220/4825B01J2220/4806B01D2253/102B01D2257/708
Inventor 戴帅帅唐盛颜亮沈薇莫檬嘉刘畅朱佳严云飞
Owner JIANGSU UNIV OF SCI & TECH
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