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Novel preparation method of mesoporous active carbon

A mesoporous activated carbon and surfactant technology, applied in chemical instruments and methods, bulk chemical production, inorganic chemistry, etc., can solve the problems of poor thermal stability and high content of porous carbon functional groups, and achieve good thermal stability , easy to recycle, inhibit aggregation effect

Inactive Publication Date: 2013-10-23
XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such porous carbon functional groups such as hydroxyl and carbonyl have high content and poor thermal stability

Method used

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  • Novel preparation method of mesoporous active carbon
  • Novel preparation method of mesoporous active carbon
  • Novel preparation method of mesoporous active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 2g of glucose and add it to 20g of 1-butylsulfonic acid-3-methylimidazolium bisulfate, dissolve at 60°C for 30min, heat to 150°C for carbonization for 5h, and obtain a solid that is washed and dried to obtain primary activated carbon. The primary activated carbon yield was 37.8%, and its elemental composition was: C, 61.22%; H, 4.33%; O, 32.31%; S, 1.57%; N, 0.38%. Then the primary activated carbon was placed in a tubular carbonization furnace, and CO was introduced at a flow rate of 15ml / min. 2 The air was replaced for 15 min, and then heated to 500 °C for 2 h at a heating rate of 10 °C / min to obtain mesoporous activated carbon with a yield of 54.7% of the primary activated carbon sample, and its elemental composition was: C, 85.24%; H, 3.08%; O , 10.00%; S, 0.10%; N, 0.28%.

[0030] The specific surface area analysis results show that the specific surface area of ​​the obtained mesoporous activated carbon is 454m 2 / g, the pore size is 3.55nm. Raman spectrosc...

Embodiment 2

[0032] Repeat Example 1, with the following differences: the selected starting material is cellulose, and the obtained primary activated carbon yield is 50.4%, and its elemental composition is: C, 61.66%; H, 4.78%; O, 32.25%; S , 1.85%; N, 0.77%. Then the primary activated carbon is activated by the same method as in Example 1 to obtain mesoporous activated carbon, the yield is 54.7% of the primary activated carbon sample, and its elemental composition is: C, 84.88%; H, 3.65%; O, 11.19%; S, 0.17 %; N, 0.58%. The specific surface area analysis results show that the specific surface area of ​​the obtained mesoporous activated carbon is 465m 2 / g, the pore size is 3.58nm.

Embodiment 3

[0034] Repeat Example 1, with the following differences: the selected starting material is lignin, and the obtained primary activated carbon yield is 28.8%, and its elemental composition is: C, 55.33%; H, 5.12%; O, 30.70%; S , 6.10%; N, 2.45%. Then the primary activated carbon is activated by the same method as in Example 1 to obtain mesoporous activated carbon, the yield is 50.4% of the primary activated carbon sample, and its elemental composition is: C, 84.45%; H, 2.95%; O, 10.19%; S, 0.14 %; N, 0.58%. The specific surface area analysis results show that the specific surface area of ​​the obtained mesoporous activated carbon is 289m 2 / g, the pore size is 3.58nm.

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Abstract

The invention discloses a novel preparation method of mesoporous active carbon. The novel preparation method comprises the step that carbohydrate, wood or bamboo as raw materials undergo a reaction in the presence of an acidic ionic liquid as an ion heat carbonization solvent and a catalyst; and the reaction product is activated by CO2 to form the mesoporous active carbon. The mesoporous active carbon has a specific surface area of 289-469m<2> / g and an aperture size of 3.55-3.62nm. The mesoporous active carbon has a rod-shaped, spherical or membrane-shaped structure because of different surfactants. The ionic liquid has a strong biomass dissolution capability, does not volatilize, can be recovered easily and has good heat stability. The ion heat carbonization reaction is adopted so that a reaction temperature is low; pressurization is avoided; and operation is simple. The mesoporous active carbon can be used in fields of environmental protection, energy storage, catalysis, foods and medicine.

Description

technical field [0001] The invention belongs to the technical field of renewable energy production, in particular to a method of using "ion thermal carbonization-CO 2 Activation" two-step method to prepare mesoporous activated carbon. Background technique [0002] Activated carbon has attracted attention due to its high specific surface area, microporous-macroporous structure, and low density. At present, it has been widely used in technical fields such as catalyst carrier, energy storage, adsorption and separation. Biomass including coconut shells, bamboo chips and wood can be used as raw materials for the production of activated carbon. The surface morphology and pore structure morphology of activated carbon determine its application in emerging fields. Therefore, it is particularly important to design and construct a special structure of activated carbon. As an alternative to high-temperature pyrolysis (~800°C), hydrothermal carbonization (>200°C) has been used to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/10C01B32/336
CPCY02P20/54
Inventor 郭峰方真
Owner XISHUANGBANNA TROPICAL BOTANICAL GARDEN CHINESE ACAD OF SCI
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