Method for preparing activated carbon from coal-to-oil industrial waste

A technology for preparing activated carbon and industrial waste, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc. High, low cost, low environmental pollution effect

Inactive Publication Date: 2019-04-16
仲兴行(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a method for preparing activated carbon based on coal-to-oil industrial waste to overcome the disadvantages of low specific capacity and short charge-discharge cycle life of existing activated carbon

Method used

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  • Method for preparing activated carbon from coal-to-oil industrial waste
  • Method for preparing activated carbon from coal-to-oil industrial waste
  • Method for preparing activated carbon from coal-to-oil industrial waste

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preparation example Construction

[0029] In the process of preparing activated carbon, the first step is to pre-treat the waste from the coal-to-liquid industry. Under high temperature conditions, the impurity elements such as Si and Al react with KOH to be removed. At the same time, C and KOH can form pores to form micro Pores (average pore diameter less than 2nm).

[0030] Specifically, the process of using coal-to-liquid industrial waste to prepare activated carbon includes steps such as pretreatment, generation of porous materials, activation, and removal of impurities.

[0031] The first is preprocessing. Make it contain carbon (C) and carbon-hydrogen bond (-CH m ) Coal-to-liquid industrial waste and potassium hydroxide (KOH) are placed in a reactor according to a mass ratio of 1: (1-10) and mixed uniformly to form an alkaline mixture. The mass ratio of coal-to-liquid industrial waste to potassium hydroxide (KOH) is preferably 1:(1~3).

[0032] Fill the reactor with inert gas and fill the reactor with inert ga...

Embodiment 1

[0047] This embodiment provides a supercapacitor prepared from waste from the coal-to-liquid industry. The specific preparation method is as follows:

[0048] Step a): Mix the coal-to-liquid industrial waste and KOH uniformly in a mass ratio of 1:2; place the mixture in a reaction vessel, and the reaction vessel is filled with inert gas nitrogen; The heating is carried out at a temperature of 1000°C, the holding time is 1h, and the heating rate during heating is 10°C / min.

[0049] Step b): Place the product obtained in step a) in a reaction vessel, and pass high-temperature steam into the reaction vessel at a constant rate for a period of time, wherein the temperature of the steam is 800°C, and the holding time is 2h. The flow rate of water vapor is 10ml / min.

[0050] Step c): Fully dry the product obtained in step b); mix the dried product with 30ml of HF acid for every 10g, boil and wash for 3h, then wash with a lot of water to make it neutral, where, The mass fraction of HF acid...

Embodiment 2

[0053] This embodiment provides a supercapacitor prepared from waste from the coal-to-liquid industry. The specific preparation method is as follows:

[0054] Step a): Mix the coal-to-liquid industrial waste and KOH uniformly in a mass ratio of 1:4; place the mixture in a reaction vessel, and the reaction vessel is filled with inert gas nitrogen; The heating is carried out at a temperature of 1200°C, the holding time is 3h, and the heating rate during heating is 10°C / min.

[0055] Step b): Place the product obtained in step a) in a reaction vessel, and pass high-temperature steam into the reaction vessel at a constant speed for a period of time, wherein the steam temperature is 650°C, and the holding time is 4h. The flow rate of water vapor is 60ml / min.

[0056] Step c): Fully dry the product obtained in step b); mix the dried product with 70ml of HF acid per 10g uniformly; boil and wash for 6 hours, then wash with a large amount of water to make it neutral, where, The mass fractio...

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Abstract

The invention provides a method for preparing activated carbon through coal-to-oil industrial waste. The method comprises the following steps that firstly, the coal-to-oil industrial waste is pretreated, then subjected to vapor activation, subjected to impurity removal and dried at last to obtain super capacitation activated carbon. The pore structure of the super capacitation activated carbon prepared through the method is developed, the capacity of the activated carbon can reach 300 F / g or above when the current density is 0.5 A / g, and after 5,000-time charging and discharging, the capacityretention ratio of the activated carbon can reach 90% or above.

Description

Technical field [0001] The present invention relates to a method for preparing activated carbon, in particular to a method for preparing activated carbon based on industrial waste from coal to oil. Background technique [0002] With the improvement of people's living standards, people's demand for energy is increasing. Nowadays, fossil energy is continuously depleted, and new energy has not yet been found. In the current environment, people's demand for green energy production and storage systems is higher than ever before for energy. [0003] In this case, supercapacitors came into being. Supercapacitors have many advantages such as high charge and discharge efficiency, environmental friendliness, and long cycle life. They have become a hot spot for many scientists. [0004] The electrode material of a supercapacitor is an important factor affecting its own energy density and cost. People expect to develop an electrode material with low price and excellent performance for the supe...

Claims

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Application Information

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IPC IPC(8): C01B32/336C01B32/33B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/33C01B32/336
Inventor 郭承晓李雅浩李汉辰陈冬
Owner 仲兴行(北京)科技有限公司
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