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Method for preparing super capacitor based on biogas residue active carbon produced after biomass anaerobic dry fermentation

A technology for preparing supercapacitors and activated carbon, applied in the field of electrochemistry, can solve the problems of accumulation of heavy metal antibiotics in biogas residues, limited utilization of biogas residue aquaculture, low product yield, etc., and achieves simple and feasible operation methods, high repeatability, and developed pores. Effect

Inactive Publication Date: 2018-01-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current utilization of biogas residues is mainly divided into aquaculture and land use, but the use of biogas residues in aquaculture is increasingly restricted due to food safety considerations
Because the use of various additives may cause the accumulation of heavy metals and antibiotics in biogas residues, the long-term use of biogas residues in farmland ecosystems has the potential of pollution
However, there are very few studies on the use of biogas residues to prepare chemical raw materials or energy products. ): 253), biopesticide (Journal of Agricultural Engineering, 2013,29 (8): 212-217), the defect is that the yield of the product is low, and the preparation process still produces waste biogas residue

Method used

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  • Method for preparing super capacitor based on biogas residue active carbon produced after biomass anaerobic dry fermentation

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Effect test

Embodiment 1

[0029] In this embodiment, the supercapacitor was prepared as follows:

[0030] (1) Wash the collected biomass after anaerobic dry fermentation with deionized water, then dry it at 105° C. for 10 hours, crush it through a 40-mesh sieve, and obtain spare biogas residue particles.

[0031] (2) Take 10g of the spare biogas residue obtained in step (1) and place it in a quartz boat and put it in a high-temperature tube furnace. Under the protection of inert gas nitrogen, the temperature is raised to 400°C at a heating rate of 10°C / min, and carbonized at a constant temperature 0.5h, then stop heating, continue to cool to room temperature under the protection of inert gas, take it out and grind into powder to obtain carbonized material powder;

[0032] (3) Take 3g of the carbonized material powder obtained in step (2) and 12g of solid powder KOH and dissolve it in 100mL of deionized water, then disperse uniformly by ultrasonic, then heat it in a water bath at 80℃ for 10h, and finally put i...

Embodiment 2

[0039] In this embodiment, the supercapacitor was prepared as follows:

[0040] (1) The collected biomass after anaerobic dry fermentation is soaked in dilute sulfuric acid with a mass concentration of 0.75% and stirred for 3 hours, then washed with deionized water until it is neutral, and then dried at 105°C 10h, crush through a 40-mesh sieve to obtain spare biogas residue particles;

[0041] (2) Take 10g of the spare biogas residue obtained in step (1) and place it in a quartz boat and put it in a high-temperature tube furnace. Under the protection of inert gas nitrogen, the temperature is raised to 400°C at a heating rate of 10°C / min, and carbonized at a constant temperature 0.5h, then stop heating, continue to cool to room temperature under the protection of inert gas, take it out and grind into powder to obtain carbonized material powder;

[0042] (3) Take 3g of the carbonized material powder obtained in step (2) and 12g of the activator KOH and dissolve it in 100mL of deionize...

Embodiment 3

[0049] In this embodiment, the supercapacitor was prepared as follows:

[0050] (1) After anaerobic dry fermentation of the collected biomass, the biogas residue is soaked in a sodium hydroxide solution with a mass concentration of 20% and stirred for 3 hours, then washed with deionized water until it is neutral, and then at 105°C Dry for 10 hours and smash through a 40-mesh sieve to obtain spare biogas residue particles.

[0051] (2) Take 10g of the spare biogas residue obtained in step (1) and place it in a quartz boat and put it in a high-temperature tube furnace. Under the protection of inert gas nitrogen, the temperature is raised to 400°C at a heating rate of 10°C / min, and carbonized at a constant temperature 0.5h, then stop heating, continue to cool to room temperature under the protection of inert gas, take it out and grind into powder to obtain carbonized material powder;

[0052] (3) Take 3g of the carbonized material powder obtained in step (2) and 12g of KOH solid powder...

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Abstract

The invention discloses a method for preparing a super capacitor based on biogas residue active carbon produced after biomass anaerobic dry fermentation. The method for preparing the super capacitor based on the biogas residue active carbon after biomass anaerobic dry fermentation performs preprocessing on the biogas residues after biomass anaerobic dry fermentation, then performs high temperaturecarbonization and activation, and immerse an obtained activated product with acid and wash and dry the obtained activated product to obtain an activated carbon as a material of the electrode of the super capacitor. The active carbon prepared through the invention has an aperture structure on which micro holes and middle holes are distributed, has a relatively high specific surface area and has relatively high specific capacitance and cycling stability and is a relatively ideal electrode material of the super capacitor. The method for preparing the super capacitor based on biogas residue active carbon produced after biomass anaerobic dry fermentation uses the biogas to prepare a super capacitor so as to realize high value utilization of the biogas residual and the obtained active carbon isstable in structure and developed in pores, has a relatively high specific capacitance and cycle stability and is a relatively ideal electrode material of the super capacitor.

Description

Technical field [0001] The invention relates to the field of electrochemistry, in particular to a method for preparing supercapacitors based on biogas residue activated carbon after anaerobic dry fermentation of biomass. Background technique [0002] my country is a large agricultural country, with an annual production of more than 4 billion tons of agricultural solid waste, of which more than 3 billion livestock manure, 700 million tons of crop straw, and 1-150 million tons of vegetable waste. These wastes are both a serious source of pollution and valuable biomass energy. But today, most of these wastes are burned, discarded or directly discharged into the environment, causing environmental pollution and waste of resources. How to effectively dispose of agricultural waste has become a major environmental problem that must be faced at home and abroad. [0003] At present, anaerobic fermentation technology is one of the more mature agricultural waste resource utilization technolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/44H01G11/86C01B32/342C01B32/324
CPCY02E60/13
Inventor 岳正波王策吴文涛
Owner HEFEI UNIV OF TECH
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