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Method for safely producing nitrogen-containing super activated carbon

A safe production and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as super activated carbon safety hazards, safety production hazards, blocked pipelines, etc., to reduce production process steps, reduce consumption, The effect of reducing the alkali-carbon ratio

Inactive Publication Date: 2017-05-10
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Potassium is a very active metal element. It can react with moisture in the air to generate hydrogen, and release a large amount of heat, resulting in an explosion, which brings a huge safety hazard to the production of super activated carbon.
At the same time, during the escape process, elemental potassium will partially condense in the pipeline of the activation furnace, which will block the pipeline and bring hidden dangers to safe production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] After mixing charcoal and KOH in a ratio of 1:1, put it into the reactor. Nitrogen gas was introduced, and the temperature was raised to 300°C at a heating rate of 5K / min. After constant temperature for 2 hours, ammonia gas was introduced, and the heating rate was raised to 850°C at a heating rate of 3K / min, and activated for 2 hours. Then cool down to below 300°C in an ammonia atmosphere, pass in a mixed gas of air and ammonia to continue cooling to below 100°C, open the furnace door, push out the reactor, and take out the activation material. Wash the activated material with water, and wash the furnace door and condenser pipe in the furnace body with water, so as to achieve the purpose of recovering KOH. After recovering KOH, rinse the activated carbon with water for more than 5 times, and dry to produce the product activated carbon. The pore structure and element content analysis results of activated carbon are shown in Table 1. By adopting the treatment method of ...

Embodiment 2

[0028] After mixing charcoal and KOH in a ratio of 2:1, put it into the reactor. Nitrogen gas was introduced, and the temperature was raised to 300°C at a heating rate of 5K / min. After constant temperature for 2 hours, ammonia gas was introduced, and the heating rate was raised to 850°C at a heating rate of 3K / min, and activated for 2 hours. Then cool down to below 300°C in an ammonia atmosphere, pass in a mixed gas of air and ammonia to continue cooling to below 100°C, open the furnace door, push out the reactor, and take out the activation material. Wash the activated material with water, and wash the furnace door and condenser pipe in the furnace body with water, so as to achieve the purpose of recovering KOH. After recovering KOH, rinse the activated carbon with water for more than 5 times, and dry to produce the product activated carbon. The pore structure and element content analysis results of activated carbon are shown in Table 1. By adopting the treatment method of ...

Embodiment 3

[0030] After mixing petroleum coke and KOH according to the ratio of 2:1, put it into the reactor. Nitrogen gas was introduced, and the temperature was raised to 300°C at a heating rate of 5K / min. After constant temperature for 2 hours, ammonia gas was introduced, and the heating rate was raised to 800°C at a heating rate of 3K / min, and activated for 2 hours. Then cool down to below 300°C in an ammonia atmosphere, pass in a mixed gas of air and ammonia to continue cooling to below 100°C, open the furnace door, push out the reactor, and take out the activation material. Wash the activated material with water, and wash the furnace door and condenser pipe in the furnace body with water, so as to achieve the purpose of recovering KOH. After recovering KOH, rinse the activated carbon with water for more than 5 times, and dry to produce the product activated carbon. The pore structure and element content analysis results of activated carbon are shown in Table 1. By adopting the tr...

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PUM

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Abstract

The invention discloses a method for safely producing nitrogen-containing super activated carbon. The method comprises the step of feeding ammonia gas in a KOH activation process for activation; reaction between the ammonia gas and carbon at high temperature can be used for producing a developed pore structure; furthermore, reaction between the ammonia gas and potassium can be used for solving the problem of difficult release of the potassium in the KOH activation process, and the aim of doping a nitrogen element into the surface of activated carbon is fulfilled. By the adoption of the method, the nitrogen-containing activated carbon with a high specific surface area can be prepared, and the severe production safety problem caused by production and release of elemental potassium in the process of activating KOH to produce the super activated carbon can be solved; a new technical way is supplied to industrial production of the super activated carbon through a KOH activation method.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for safely producing nitrogen-containing super activated carbon. Background technique [0002] Activated carbon is a kind of highly developed pore structure and high specific surface area (usually 800 ~ 1500m 2 / g) excellent carbonaceous adsorbent, has been widely used in many fields such as environmental protection, chemical industry, food and military industry. Super activated carbon is a kind of specific surface area greater than 2000m 2 / g of new porous carbon materials, it has broad application prospects in the fields of super electric double layer capacitor electrode materials, catalyst supports, gas separation, hydrogen and natural gas storage materials. Therefore, super activated carbon has become a new type of carbon material that has been developed in the world's carbon material industry in the past 20 years. At present, the main meth...

Claims

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Application Information

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IPC IPC(8): C01B32/348
CPCC01P2006/12C01P2006/14
Inventor 左宋林张文彬王永芳
Owner NANJING FORESTRY UNIV
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