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Method for auxiliary preparation of biomass-based functional active carbon material by using concentrated seawater and application thereof

A technology of biomass materials and concentrated seawater, which is applied in the direction of chemical instruments and methods, carbon compounds, and other chemical processes, and can solve problems such as difficult seawater treatment and expensive activators

Pending Publication Date: 2019-04-19
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the above-mentioned background technology, the present invention is mainly to solve the two difficulties that the desalinated seawater is difficult to handle and the expensive activator required for the preparation of activated carbon. The purpose of the present invention is to provide a method of using concentrated seawater to assist the preparation of biomass-based functional activated carbon And its application, while solving the environmental problems caused by concentrated seawater, it also turns waste into treasure for the preparation of low-priced and high-value biomass-based functional activated carbon

Method used

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  • Method for auxiliary preparation of biomass-based functional active carbon material by using concentrated seawater and application thereof
  • Method for auxiliary preparation of biomass-based functional active carbon material by using concentrated seawater and application thereof
  • Method for auxiliary preparation of biomass-based functional active carbon material by using concentrated seawater and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A method of using concentrated seawater to assist in the preparation of biomass-based functional activated carbon materials in this embodiment specifically includes the following steps:

[0062] (1) Put the sycamore bark washed with distilled water several times in an oven at 60° C. to dry for 12 hours, and then use a ball mill at 350 rpm for 2 hours to be used for later use.

[0063] (2) Proportioning 100mL of 8 times concentrated seawater: add NaCl: 21.0g; MgCl 2 : 2.2g; MgSO 4 : 2.54g; CaCl 2 : 0.942g; KCl: 0.612g; NaHCO 3 : 0.159g; NaBr: 0.071g, then dilute to 100mL.

[0064] (3) Get 10g of the sycamore bark after ball milling in step (1) and 8 times concentrated seawater of step (2) 100mL to mix and stir overnight; add liquid nitrogen quickly after stirring, and place in a freeze dryer for freeze-drying for 48h; freeze The dried sample was placed in a tube furnace and heated up to 700°C at 4°C / min under an argon atmosphere of 100mL / min, kept at 700°C for 2 hour...

Embodiment 2

[0069] A method of using concentrated seawater to assist in the preparation of biomass-based functional activated carbon materials in this embodiment specifically includes the following steps:

[0070] (1) Prepare 100mL of 8-fold concentrated seawater: add NaCl: 21.7g; MgCl 2 : 2g; MgSO 4 : 2.72g; CaCl 2 : 0.936g; KCl: 0.592g; NaHCO 3 : 0.168g; NaBr: 0.064g, then dilute to 100mL.

[0071](2) Mix 5 g of fish scales with 50 mL of 8-fold concentrated seawater prepared in step (1) and stir overnight. After the stirring is completed, quickly place it in a hydrothermal reaction kettle and keep it warm at 160° C. for 12 hours. Add liquid nitrogen to the obtained filtrate, place it in a freeze dryer and dry it for 24 hours; place the freeze-dried sample in a tube furnace and raise the temperature to 800°C at a rate of 5°C / min under an argon atmosphere of 100mL / min. Keep the temperature at 800°C for 2 hours, then cool down to room temperature naturally to obtain the carbonized prod...

Embodiment 3

[0076] A method of using concentrated seawater to assist in the preparation of biomass-based functional activated carbon materials in this embodiment specifically includes the following steps:

[0077] (1) Prepare 100mL of 8-fold concentrated seawater: add NaCl: 21.2g; MgCl 2 : 2.1g; MgSO 4 : 2.54g; CaCl 2 : 0.925g; KCl: 0.61g; NaHCO 3 : 0.172g; NaBr: 0.071g, then dilute to 100mL.

[0078] (2) Mix 3 g of tofu with 50 mL of 8-times concentrated seawater prepared in step (1) and stir overnight, and then quickly place it in a hydrothermal reaction kettle for 14 hours at 120° C. after stirring. Add liquid nitrogen to the obtained filtrate and place it in a freeze dryer to dry for 24 hours; place the freeze-dried sample in a tube furnace, raise the temperature to 900°C at 2°C / min under a nitrogen atmosphere of 100mL / min, and keep it at 900°C for 4 hours , and then naturally lowered to room temperature to obtain carbonized products. The obtained carbonized product was filtered ...

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Abstract

The invention discloses a method for auxiliary preparation of a biomass-based functional active carbon material by using concentrated seawater, which comprises the following steps of: uniformly mixinga biomass material and concentrated seawater, drying, performing high-temperature carbonization under an oxygen-free condition to obtain the biomass-based functional active carbon material, and mixing the obtained first washing liquid with the biomass material again for recycling. The carbon material prepared by the method can be used as a super capacitor electrode, an adsorption material and thelike. According to the method, two difficult points that seawater is difficult to treat after desalination and an activator required by active carbon preparation is expensive are solved; meanwhile, the washing waste liquid can be combined with the chlor-alkali industry, the Hussein alkali preparation method and the seawater bromine extraction process to prepare other products, so that resources are saved, economic cost is controlled, pollution is reduced and the purposes of industry-to-industry metabolism and green circular economic process are achieved. The method for preparing the biomass-based functional active carbon has the advantages of simple operation, low cost, large specific surface area of the prepared carbon material, multiple pore structures, and excellent electrochemical, adsorption and catalytic performances.

Description

technical field [0001] The present invention relates to the preparation method and application of bio-based functional carbon materials. More specifically, the present invention relates to a method and its application of using concentrated seawater as an activator and pore-forming agent to assist in the preparation of bio-based functional activated carbon materials. The inventive method can also realize cyclic preparation, and the prepared biomass-based functional activated carbon material can be applied to fields such as supercapacitors, adsorption materials, and catalytic materials. Background technique [0002] With the development of the economy, fresh water resources are being consumed at an alarming rate, and the shortage of fresh water resources will be an important problem facing the world. Seawater desalination is one of the effective ways to solve the water shortage. Concentrated seawater is high-concentration brine obtained in the final stage of seawater desalinat...

Claims

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Application Information

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IPC IPC(8): C01B32/348C01B32/324B01J20/20B01J20/28B01J20/30B01J21/18H01G11/34H01G11/44
CPCB01J20/205H01G11/34H01G11/44C01B32/324C01B32/348B01J20/28033B01J21/18B01J35/33Y02E60/13
Inventor 彭创于芳张伶俐
Owner WUHAN UNIV
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