Method for producing capacitive carbon from rice husks

A technology of capacitive carbon and rice husk, applied in chemical instruments and methods, silicate, inorganic chemistry, etc., can solve problems such as safety production accidents, easy pollution of the environment, and great difficulties, so as to increase energy density and avoid danger and pollution Environment, the effect of reducing the molecular weight of tar

Active Publication Date: 2016-02-17
旗禾科技(吉林)有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of industrial production, a large amount of potassium or sodium vapor is produced. If it is not treated in time, it will cause an explosion when it encounters water after enrichment, and it is easy to cause a safety production accident.
[0012] 3. The tail gas contains potassium or sodium vapor, alkali vapor, hydrogen, carbon monoxide and small molecule organic flammable gases. If not treated, it is easy to pollute the environment and there is a hidden danger of combustion and explosion
[0013] 4. Rice husk contains about 20wt% silicon dioxide, which has a natural nanostructure. After pyrolysis, it can be used as a template with rice husk carbon, which has the natural advantage of being a capacitor carbon. However, it is the presence of silicon dioxide that can produce capacitors. It is very difficult to reduce the ash content below 0.3wt% when using charcoal

Method used

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  • Method for producing capacitive carbon from rice husks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] (1) Mixing the screened and purified rice husk and sodium hydroxide in a ratio of 100:3 on a dry basis, adding the pyrolysis tower through a Dou elevator, adjusting the induced draft fan speed, and controlling the oxygen content entering the pyrolysis zone, so that The temperature of the pyrolysis section is kept at 650°C, and the pyrolysis is performed for 1.0 hour, and the rice husk is catalyzed and pyrolyzed into pyrolysis gas and pyrolysis charcoal;

[0109] (2) The 650°C pyrolysis gas and pyrolysis charcoal obtained in step (1) continue to descend along the pyrolysis tower, keep the constant temperature for tar removal for 1.0 hour, and the newly generated tar-free pyrolysis gas and pyrolysis charcoal enter the thermal In the water-cooled cooling section of the decomposition tower, the temperature is lowered to 300°C, and separated by a cyclone separator to produce pyrolysis gas with a calorific value of 2100 kcal and pyrolytic carbon containing 2wt% volatile matter...

Embodiment 2

[0113] Change the catalyst to potassium hydroxide, and the remaining conditions are as in Example 1, producing pyrolysis gas with a calorific value of 2200 kcal and pyrolytic carbon containing 1.5wt% volatile matter;

Embodiment 3

[0115] The pyrolytic charcoal obtained in Example 1 is added into the horizontal reaction kettle through a screw propeller, and 5% aqueous sodium hydroxide solution is added in a ratio of 1:5 to the solid-liquid ratio, and the horizontal reaction kettle is rotated to make the pyrolytic charcoal Uniformly mix with lye, pass into Example 1 to obtain boiler steam, keep the steam pressure at 5 atmospheres, react for 3 hours, discharge the material under pressure, put the mixed hydraulic pressure into the No. 1 storage tank, and separate the solid and liquid through the No. 1 centrifuge , recover the sodium silicate solution, the solid enters the No. 2 storage tank through the conveyor belt, adds 80°C purified tap water, stirs and dissolves for 20 minutes, and separates the solid from the liquid through the No. 2 centrifuge, and the solid enters the No. 3 storage tank through the conveyor belt, and adds 70°C purified tap water , stirred and dissolved for 20 minutes, separated from t...

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Abstract

The invention discloses a method for producing capacitive carbon from rice husks and belongs to the technical field of the biomass energy chemical industry. The method comprises the following steps: 1, the rice husks and a catalyst are mixed uniformly and subjected to pyrolysis, and pyrolytic gas and pyrolytic carbon are produced; 2, the pyrolytic gas and the pyrolytic carbon are subjected to constant-temperature catalytic decoking, volatile components of the pyrolytic carbon are reduced, and tar is pyrolysed into small molecules; 3, a horizontal reaction kettle is adopted and rotated, the pyrolytic carbon and alkali liquor are mixed uniformly, and a mixture is subjected to hot-pressing desilicication, washing and drying; 4, template carbon and an activator are ground, stirred at a high speed for homogenization and uniformly distributed; 5, a push type activation furnace is adopted, the heating rate and activation time are controlled, and an activation material is prepared; 6, the activation material is washed, pickled and washed to be neutral; 7, a product is dried, graded and packaged. The rice husks are adopted to produce the capacitive carbon, biomass is used for producing renewable energy sources and chemicals, the cost is low, the method is environment-friendly, a production process is safe and pollution-free, and large-scale production can be realized.

Description

technical field [0001] The invention belongs to the technical field of biomass energy chemical industry, and in particular relates to a preparation method of capacitor carbon. Background technique [0002] Renewable energy instead of fossil energy has attracted widespread attention from all walks of life around the world. With the industrial development of electric vehicles and wind power generation with the industrialization of renewable energy, there is a huge market demand for supercapacitors and energy storage batteries. [0003] Lead-carbon batteries are the most advanced technology in the field of lead-acid batteries, and are also the development focus of the international new energy storage industry, with very broad application prospects. Energy storage battery technology is one of the key technologies restricting the development of new energy storage industry. Energy storage fields such as photovoltaic power station energy storage, wind power energy storage and gri...

Claims

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Application Information

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IPC IPC(8): C01B31/10C01F11/18C01B33/24C01B32/336
CPCY02P20/133C01F11/18C01B33/24C01P2006/40C01P2006/82C01P2006/90
Inventor 王子忱李洪坤
Owner 旗禾科技(吉林)有限责任公司
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