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Method for producing active carbon for gasoline vapor adsorption

A production method and activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve the problems of excessive dust on the carbon surface, increase airflow resistance, shorten service life, etc. Duration, the effect of reducing mechanical wear

Inactive Publication Date: 2012-10-03
淮北市大华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heap specific gravity of this kind of wood charcoal is about 0.26g / ml to 0.28g / ml. The disadvantage is that the strength is not high and there is a lot of floating dust on the surface of the charcoal. These defects will shorten the service life and increase the airflow resistance. The adsorption capacity per unit weight is used to improve the adsorption capacity and working capacity

Method used

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  • Method for producing active carbon for gasoline vapor adsorption
  • Method for producing active carbon for gasoline vapor adsorption
  • Method for producing active carbon for gasoline vapor adsorption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Phosphoric acid is used as a chemical activator, and wood chips are used as raw materials. After the wood chips are dried, they are pulverized with a Raymond mill to a powder finer than 80 mesh. 500kg of dry wood flour is blended with 500kg of industrial phosphoric acid with a concentration of 85%. After the blend is uniform, it is soaked in a pool. After soaking for 10 hours, it is kneaded in a kneader with electric heating function. °C, kneading time 2.5 hours.

[0025] 2. The kneaded material is placed in the mold of the extruder, and the extruder is heated by electricity at a heating temperature of 120°C. The extruder extrudes strips of Φ2.5mm. It can increase the specific gravity and wear resistance of activated carbon.

[0026] 3. Put the strips into the drying furnace. The drying time of the strips in the furnace is about 6 hours, and the drying temperature is 90-140°C.

[0027] 4. Put the drying material into the rotary activation furnace, the activation ...

Embodiment 2

[0033] 1. Use undried wood chips with a moisture content of 10%. Use 675kg of wood chips and soak them in 1000 kg of phosphoric acid with a concentration of 85%. After soaking for 8 hours, knead them in a kneader at a temperature of 95°C for 3 hours.

[0034] 2. Extrude the kneading material, the extruding temperature is 120°C, and the Φ2.5mm mold is still used.

[0035] 3. Dry the strips in the dryer for 8 hours at a drying temperature of 105°C.

[0036] 4. The drying material is activated in the rotary kiln, the activation temperature is 480°C, and the activation time is 5 hours.

[0037] 5. After soaking the activated carbon in water to recover phosphoric acid, the wet carbon is put into the calciner, the temperature rises to 1050°C, and the calcining time is 40 minutes. At this time, the charcoal surface is shiny.

[0038] The technical index of gained product detection is as follows:

[0039]

Embodiment 3

[0041] 1. Provide 1000kg of wood chips and 150kg of coal powder, soak them with 2300kg of zinc chloride with a concentration of 56%, soak for 10 hours, knead in a kneader at a temperature of 95°C, and knead for 2 hours.

[0042] 2. Extrude the kneading material, the extruding temperature is 120°C, and the Φ2.5mm mold is still used.

[0043] 3. The strips are dried in the dryer for 7.5 hours at a drying temperature of 110°C.

[0044] 4. The drying material is activated in the rotary kiln, the activation temperature is 480°C, and the activation time is 6 hours.

[0045] The technical index of gained product detection is as follows:

[0046]

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Abstract

The invention discloses a method for producing active carbon for gasoline vapor adsorption. The method comprises the steps of: taking other wood material containing carbon as raw materials, and taking zinc chloride, phosphoric acid and the like as activating agents, and mixing, kneading, extruding, drying, activating, soaking and conducting other steps to prepare a finished product. According to the method disclosed by the invention, bulk specific weight can be improved effectively, namely the weight adsorption amount of the carbon is improved, so that the gasoline adsorption amount of the active carbon for gasoline vapor adsorption can be improved to be 16g / 100ml; the displacement volume is improved to be 9g / 100ml; the working volume of an adsorption plant is reduced; the application range is expanded; the abrasive resistance of the active carbon for gasoline vapor adsorption is improved to be over 93%; mechanical wear of the active carbon in the using process is reduced; the operating life is prolonged; the floating dust on the surface of the active carbon is basically removed; airflow resistance is reduced, and the method is not only used for gasoline vapor adsorption, but also suitable for recovery of benzene and high-boiling point solvents.

Description

Technical field [0001] The present invention relates to a kind of production method of activated carbon, more specifically relate to a kind of new production method of activated carbon used for gasoline vapor adsorption. Background of the invention: [0002] Activated carbon is a microcrystalline and non-graphite carbon with a large specific surface area and well-developed internal micropores. It has selective adsorption capacity. The adsorption capacity is determined by the specific surface area and the pore volume of the micropores with effective pore diameter. Activated carbon used for gasoline vapor adsorption requires high gasoline adsorption capacity, good desorption, and good strength. For example, the adsorption capacity of activated carbon for automobile canisters is stipulated in the "Automotive Gasoline Vapor Adsorption Device" standard, gasoline adsorption capacity ≥ 11g / 100ml, working capacity ≥6.5g / 100ml. At present, the activated carbon used for gasoline vap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30C01B31/12C01B32/318C01B32/342
Inventor 周之鹏周大可曹秀云
Owner 淮北市大华环保科技有限公司
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