Coprinus comatus mushroom dreg porous carbon adsorbent as well as preparation method and application thereof

A technology of Coprinus comatus and Coprinus comatus, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of low carbon yield, loss of surface functional groups, corrosion, etc., and achieve high carbon yield and good industrial performance. The effect of applying the foreground

Active Publication Date: 2021-04-23
TIANJIN UNIV
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Problems solved by technology

[0003] In the prior art, corrosive or toxic activators such as potassium hydroxide and zinc chloride are often used to prepare high-efficiency adsorbents from biomass, combined with high-temperature pyrolysis activation processes, and the obtained adsorbent carbon materials have a high specific surface area and adsorption capacity, but there are often problems such as low carbon yield (10% to 20%), loss of surface functional groups, and severe corrosion

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  • Coprinus comatus mushroom dreg porous carbon adsorbent as well as preparation method and application thereof
  • Coprinus comatus mushroom dreg porous carbon adsorbent as well as preparation method and application thereof

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preparation example Construction

[0025] The invention discloses a preparation method of a porous carbon adsorbent for Coprinus comatus slag, comprising:

[0026] S1, mixing Coprinus comatus scum and an activator to form a mixed slurry for hydrothermal reaction;

[0027] S2. Drying and pyrolyzing the solid obtained from the hydrothermal reaction to obtain the porous carbon adsorbent for Coprinus comatus slag.

[0028] In some embodiments of the present invention, the activator in step S1 includes at least one of ammonium phosphate, phosphoric acid, and urea.

[0029] In some embodiments of the present invention, the mass ratio of the activating agent to Coprinus comatus mushroom residue in step S1 is (2 to 4):1, for example, 2:1, 3:1, 4:1.

[0030] In some embodiments of the present invention, the reaction temperature of the hydrothermal reaction in step S1 is 100 to 180°C, such as 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C °C, 180 °C; the reaction time is 6 to 12h, such as 6h, 7h, 8h, 9h, 10h, 1...

Embodiment 1

[0060] 1. Biomass raw material pretreatment

[0061] The collected Coprinus comatus fungus residues were dried in a blast drying oven at 60°C, and the dried samples were crushed to 20 meshes by a pulverizer, and classified and packed for later use.

[0062] 2. Preparation method

[0063] (1) Hydrothermal: Weigh 5.0g of Coprinus comatus mushroom residue, pour 50mL of deionized water into it, weigh 15g (NH 4 ) 3 PO 4 Pour in the above slurry, stir at RT for 1h (300r / min), transfer to a 100mL hydrothermal reaction kettle, seal, keep the temperature in a drying oven at 180°C for 6h, open it for natural cooling, and dry at 105°C.

[0064] (2) Pyrolysis: transfer to a tube furnace at 600°C, keep the temperature constant for 1h, (heating rate 5°C / min, N2 100mL / min), after natural cooling, wash with HCl to remove ash, dry at 105°C, the charcoal yield is 64.5% .

[0065] Weigh 0.080 g of Coprinus comatus slag hydrothermal pyrolysis carbon (ie Coprinus comatus slag porous carbon ad...

Embodiment 2

[0067] 1. Biomass raw material pretreatment

[0068] The collected Coprinus comatus fungus residues were dried in a blast drying oven at 60°C, and the dried samples were crushed to 20 meshes by a pulverizer, and classified and packed for later use.

[0069] 2. Preparation method

[0070] (1) Hydrothermal: Weigh 5.0g of Coprinus comatus mushroom residue, pour 50mL of deionized water, stir evenly, transfer to a 100mL hydrothermal reaction kettle, seal, keep the temperature at 180°C for 6h in a drying oven, cool it naturally, open it, weigh 15.0g (NH 4 ) 3 PO 4 Add the above slurry, stir at RT for 1h (300r / min), and dry at 105°C.

[0071] (2) Pyrolysis: transfer to a tube furnace at 600°C, hold constant temperature for 1h (heating rate 5°C / min, N2 100mL / min), after natural cooling, wash with HCl to remove ash, dry at 105°C, the charcoal yield is 54.8%.

[0072] Weigh 0.080g of Coprinus comatus slag of 40-60 mesh hydrothermal pyrolysis charcoal, and conduct adsorption test in...

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Abstract

The invention relates to a coprinus comatus mushroom dreg porous carbon adsorbent as well as a preparation method and application thereof. The preparation method comprises the steps of mixing coprinus comatus mushroom dregs with an activating agent to form mixed slurry for hydrothermal reaction; and drying and pyrolyzing the solid obtained by the hydrothermal reaction to obtain the coprinus comatus mushroom dreg porous carbon adsorbent. According to the method, an ammonium phosphate activation process is explored, and meanwhile, the promotion effect of hydrothermal coupling low-temperature pyrolysis is compared; the yield of the ammonium phosphate hydrothermal combined low-temperature pyrolytic carbon can reach 64.84%, and the adsorption capacities of the ammonium phosphate hydrothermal combined low-temperature pyrolytic carbon on benzene and dichloroethane are as high as 85.7 mg / g-biomasses and 128.8 mg / g-biomasses; compared with different pyrolysis temperatures, it is found that low-temperature pyrolysis activation is easier to maintain a complete carbon skeleton and retain heteroatoms; and hydrothermal carbonization has an immobilization effect on the carbon skeleton, N / P heteroatoms can be effectively retained, the carbon skeleton can be effectively protected in the pyrolysis activation process through the cross-linking effect of ammonium phosphate, and finally the high carbon yield is obtained.

Description

technical field [0001] The invention belongs to the technical field of utilization of biomass solid waste resources and air pollution control, and in particular relates to a porous carbon adsorbent for Coprinus comatus mushroom residue, a preparation method and application thereof. Background technique [0002] With the acceleration of urbanization and industrialization and the rapid development of the national economy, the emission of volatile organic compounds VOCs (Volatile Organic Compounds) has increased sharply. VOCs emissions come from a wide range of sources, mainly including industrial sources, agricultural sources, traffic sources and natural sources. Among them, VOCs emissions from industrial sources are the main emission source, accounting for more than 50% of the total emission source, and the emission is expected to reach 24.46 million tons in 2020. The emission of VOCs from industrial flue gas has various types, complex components, strong toxicity, and is eas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01J20/3078B01D53/02B01J2220/4887B01D2257/708Y02A50/20
Inventor 林法伟玉洪迪陈冠益颜蓓蓓程占军崔孝强宋英今
Owner TIANJIN UNIV
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