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Method for preparing porous carbon material from allyl wastes and application

A waste and porous carbon technology, which is applied in the field of biochar material preparation, can solve the problems of environmental pollution, strong irritating odor of garlic residue, waste of resources, etc., and achieve good wettability, improved electrochemical performance, and low time constant. Effect

Active Publication Date: 2018-09-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The abandonment of these garlic residues not only causes a great waste of resources, but also seriously pollutes the environment due to the strong pungent odor of garlic residues.

Method used

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  • Method for preparing porous carbon material from allyl wastes and application
  • Method for preparing porous carbon material from allyl wastes and application
  • Method for preparing porous carbon material from allyl wastes and application

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preparation example Construction

[0047] In yet another embodiment of the present invention, a method for preparing a garlic-based waste porous carbon material for supercapacitors is provided, the method comprising:

[0048] S1. Heat and carbonize the garlic-based waste in an inert atmosphere, the carbonization temperature is 400-800°C, and the carbonization time is 80min-150min;

[0049] S2. Pickling the product obtained in step S1, and then washing it with water until neutral;

[0050] S3. Immersing the product obtained in step S2 in a chemical activator;

[0051] S4. The product obtained in step S3 is heated and activated at a heating temperature of 700-900° C. for 60-140 minutes; after pickling, water washing and drying, a garlic-based waste porous carbon material is obtained.

[0052] In yet another specific embodiment of the present invention, in the step S1,

[0053] Before the garlic-based waste is heated and carbonized, it is washed, dried, crushed and sieved;

[0054] Further, the drying treatment...

Embodiment 1

[0087] The present embodiment relates to a method for preparing porous carbon for supercapacitors based on garlic waste, comprising the steps of:

[0088] Step 1: Rinse the raw garlic seedlings with clean water to remove impurities, dry them at 105°C for 24 hours, crush them, and pass through an 80-mesh sieve.

[0089] Step 2: Take the garlic seedling powder obtained in Step 1 and place it in a tube furnace for carbonization at 600° C. for 2 hours. The protective gas is nitrogen, and the flow rate is 1 L / min. The heating rate was 5°C / min.

[0090] Step 3: Take the carbonized product obtained in Step 2 and 10wt% hydrochloric acid and place it in a water bath at 80°C for 30 minutes with magnetic force, then wash it with deionized water until it becomes neutral, and dry the obtained product in a blast drying oven at 105°C.

[0091] Step 4: Take the product obtained in Step 3 and mix it with KOH at a mass ratio of 1:4, and place it in an atmosphere muffle furnace for activation a...

Embodiment 2

[0095] The present embodiment relates to a method for preparing porous carbon for supercapacitors based on garlic waste, comprising the steps of:

[0096] Step 1: Rinse the garlic dregs raw material with clean water to remove impurities, dry at 105°C for 24 hours, pulverize, and pass through a 120-mesh sieve.

[0097] Step 2: Take the garlic seedling powder obtained in Step 1 and place it in a tube furnace for carbonization at 600°C for 2 hours. The protective gas is nitrogen, and the flow rate is 1.5 L / min. The heating rate is 10°C / min.

[0098] Step 3: Take the carbonized product obtained in Step 2 and 20wt% hydrochloric acid and place it in a water bath at 80°C for 30 minutes with magnetic force, then wash it with deionized water until it becomes neutral, and dry the obtained product in a blast oven at 105°C.

[0099] Step 4: Take the product obtained in Step 3 and mix it with KOH at a mass ratio of 1:5, and place it in an atmosphere muffle furnace for activation at 750°C ...

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Abstract

The invention discloses a method for preparing a porous carbon material from allyl wastes and application. The preparation method comprises the following steps: S1, heating and carbonizing the allyl wastes in an inert atmosphere, wherein the carbonizing temperature is 400-800 DEG C, and the carbonizing time is 80-150 min; S2, carrying out acid pickling on the product prepared in step S1, and washing the product until the product is neutral; S3, dipping the product prepared in step S2 in a chemical activating agent; and S4, heating and activating the product prepared in step S3, wherein the heating temperature is 700-900 DEG C, and the time is 60-140 min; and carrying out acid pickling, washing and drying to obtain an allyl waste porous carbon electrode material. The method is high in professional applicability, a design process is simple, and industrialization is easy to realize. While the porous carbon material is prepared, the allyl wastes are utilized at high quality, and an obtained porous carbon super-capacitor is excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of biochar material preparation, and in particular relates to a method and application for preparing porous carbon materials from garlic-based waste. Background technique [0002] Since mankind entered the 21st century, energy shortage and environmental problems have gradually become two major problems affecting human survival. Traditional non-renewable fossil energy will be replaced, and clean and pollution-free new energy will become the mainstream of use. However, some new energy sources such as solar energy, wind energy, and tidal energy are intermittent, have low energy utilization rate, and poor power generation stability. Therefore, a matching energy storage device should be vigorously developed. Supercapacitor is a new type of energy storage device between traditional capacitors and secondary batteries. It has high power density, fast charge and discharge speed, and long cycle life. Electrode mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/348H01G11/44H01G11/34H01G11/86
CPCC01B32/324C01B32/342C01B32/348H01G11/34H01G11/44H01G11/86Y02E60/13
Inventor 韩奎华李金晓李明牛胜利王永征赵建立李英杰韩旭东高扬
Owner SHANDONG UNIV
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