Preparation method of active carbon based on cellulose aerogel, and applications thereof

A cellulose aerogel, activated carbon technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of low utilization rate of resources, waste of resources, low economic coefficient, etc. The effect of adsorption capacity and high specific surface area

Inactive Publication Date: 2017-02-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the size of corn stalks is huge, its economic coefficient is low and the resource utilization rate is low
According to relevant statistical data, the annual output of corn stalks in my country is as high as 2×10 8 tons, of which 42.2% of corn stalks are left unused or burned on site, resulting in serious waste of resources and environmental pollution [8]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment １

[0031] Embodiment 1: the preparation method of the activated carbon based on corn leaf / coated cellulose airgel, concrete operation is as follows:

[0032] (1) Preparation process of corn leaves / clothing

[0033] The corn leaves and corn coats are separated from the stalks and corn fruits, collected, mixed, and air-dried, wherein the water content of the air-dried raw materials is 5%, the mixed raw materials are crushed, sieved with a standard sieve, and passed through a 100-mesh sieve. However, the part of the 200-mesh sieve is a qualified raw material;

[0034] (2) Extraction process of cellulose

[0035] Cellulose separation conditions are: potassium hydroxide dosage 5.0%, hydrogen peroxide dosage 0.5%, material treatment concentration 8.0%, reaction time 5.0h, treatment temperature 90°C;

[0036] The specific steps are: mix 10.0g of absolute dry corn leaf / clothes powder raw material (if the moisture content of air-dried raw material is 5.00%, weigh 10.5g of air-dried mate...

Embodiment 2

[0046] Embodiment 2: the preparation method based on the activated carbon of corn leaf / coated cellulose aerogel, concrete operation is as follows:

[0047] (1) Preparation process of corn leaves / clothing

[0048] The corn leaves and corn coats are collected, mixed, and air-dried. The water content of the air-dried raw materials is 15%. The mixed raw materials are crushed and sieved with a standard sieve. For qualified raw materials.

[0049] (2) Extraction process of cellulose

[0050] The cellulose separation conditions are as follows: the dosage of potassium hydroxide is 12.0%, the dosage of hydrogen peroxide is 3.0%, the material treatment concentration is 10.0%, the reaction time is 12.0h, and the treatment temperature is 55°C.

[0051] The specific steps are: mix 10.0g of absolute dry corn leaf / clothes powder raw material (if the moisture content of air-dried raw material is 15.00%, weigh 11.8g of air-dried material) with 6.0mL of potassium hydroxide solution (concentra...

Embodiment 3

[0061] Embodiment 3: the preparation method based on the activated carbon of corn leaf / coated cellulose airgel, specific operation is as follows:

[0062] (1) Preparation process of corn leaves / clothing

[0063] The corn leaves and corn coats are collected, mixed, and air-dried, wherein the water content of the air-dried raw materials is 25%, the mixed raw materials are crushed, sieved with a standard sieve, and the part passing through the 350-mesh sieve but not the 500-mesh sieve is taken For qualified raw materials.

[0064] (2) Extraction process of cellulose

[0065] The cellulose separation conditions are as follows: the dosage of potassium hydroxide is 20.0%, the dosage of hydrogen peroxide is 5.0%, the material processing concentration is 15.0%, the reaction time is 24.0h, and the processing temperature is 25°C.

[0066] The specific steps are: mix 10.0g of absolute dry corn leaf / clothes powder raw material (if the moisture content of air-dried raw material is 25.00%...

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Abstract

The invention discloses a preparation method of active carbon based on cellulose aerogel. The preparation method comprises following steps: air-dried corn leaf and corn skin are collected via peeling, and are subjected to shearing, mixing, grinding, and sieving so as to obtain a qualified raw material; the qualified raw material is subjected to hydrogen peroxide/potassium hydroxide treatment so as to obtain corn biomass cellulose; the corn biomass cellulose is subjected to swelling via low temperature sodium hydroxide/urea method, and is subjected to heating to realize gelatinization, and low temperature liquid nitrogen treatment is carried out so as to prepare a cellulose aerogel; the cellulose aerogel is subjected to segment heating carbonization drying in nitrogen, and high temperature activation of the processed cellulose aerogel with carbon dioxide is carried out, so that the carbonaceous adsorbent with relatively large specific surface area and pore volume is obtained. The active carbon prepared via the preparation method possesses a black large particle structure, and possesses relatively high adsorption capacity on carbon dioxide.

Description

technical field [0001] The invention relates to a method for preparing and absorbing carbon dioxide (CO 2 ) technology of granular activated carbon, which belongs to the technical field of natural polymer modified materials. Background technique [0002] Currently CO 2 The greenhouse effect caused by CO has become a global environmental problem. 2 Capture, utilization and storage is the key to controlling CO 2 Effective means of emission has become a hot spot for efficient and clean utilization of fossil energy. CO 2 capture is to achieve CO 2 The premise of utilization and storage, the development of high-efficiency and low-cost CO 2 Capture technology has become the focus of current research. Capture CO 2 The methods mainly include solvent absorption method, membrane separation method, cryogenic method, adsorption method, etc. [1] . Among them, the adsorption method has the advantages of simple process, low energy consumption, good stability, high operating flexi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01J20/20B01J20/28016B01J20/28054B01D2257/504B01J2220/4825Y02C20/40
Inventor 高欣张恒陈克利何洁
Owner KUNMING UNIV OF SCI & TECH
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