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Method for preparing modified microwave activated carbon sorbent

A technology of activated carbon adsorption and activated carbon, which is applied in the field of preparation of modified activated carbon adsorbent and modified microwave activated carbon adsorbent, to achieve the effect of easy acquisition, low cost and good separation effect

Inactive Publication Date: 2012-07-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microwave activated carbon in adsorption and separation of CO 2 / CH 4 The application in the field of gas has not been reported yet

Method used

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  • Method for preparing modified microwave activated carbon sorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: A kind of preparation method of modified microwave activated carbon adsorbent, concrete operation is as follows:

[0018] (1) Grind and sieve microwave coconut shell activated carbon to 40 mesh, take 17g of activated carbon and wash with distilled water for 3 times, dry at 100°C for 24 hours, then cool down to room temperature naturally in a drying dish;

[0019] (2) Place the treated activated carbon in 34ml of 0.5mol / L potassium carbonate solution, impregnate it for 4h at 30°C, with an ultrasonic frequency of 28KHz, and then dry it in a constant temperature drying oven at 100°C for 24h;

[0020] (3) Finally, place the activated carbon in a muffle furnace and roast it at 350°C for 4 hours, then cool it down to room temperature naturally in a drying dish to obtain the modified microwave activated carbon adsorbent.

[0021] (4) Take 2.0 g of modified microwave activated carbon adsorbent, and absorb and separate CO at 25 °C 2 and CH 4 gas, CO 2 and CH 4 Th...

Embodiment 2

[0022] Example 2: A kind of preparation method of modified microwave activated carbon adsorbent, concrete operation is as follows:

[0023] (1) Grind and sieve the microwave coal-based activated carbon to 50 mesh, take 17g of activated carbon and wash it with distilled water for 4 times, dry it at 110°C for 18 hours, and then naturally cool it down to room temperature in a drying dish;

[0024] (2) Place the treated activated carbon in 51ml of 1mol / L potassium chloride solution, impregnate it for 2h at 40°C, with an ultrasonic frequency of 35KHz, and then dry it in a constant temperature drying oven at 110°C for 18h;

[0025] (3) Finally, place the activated carbon in a muffle furnace and roast it at 200°C for 5 hours, then cool it down to room temperature naturally in a drying dish to obtain the modified microwave activated carbon adsorbent.

[0026] (4) Take 2.0 g of modified microwave activated carbon adsorbent, and absorb and separate CO at 25 °C 2 and CH 4 gas, CO 2 ...

Embodiment 3

[0027] Example 3: A kind of preparation method of modified microwave activated carbon adsorbent, concrete operation is as follows:

[0028] (1) Grind and sieve microwave coconut shell activated carbon to 60 mesh, take 17g of activated carbon and wash with distilled water for 3 times, dry at 120°C for 12 hours, then cool down to room temperature naturally in a drying dish;

[0029] (2) Place the treated activated carbon in 68ml of 2mol / L potassium hydroxide solution, impregnate it for 0.5h at 35°C and ultrasonic frequency of 45KHz, and then dry it in a constant temperature drying oven at 120°C for 12h;

[0030] (3) Finally, place the activated carbon in a muffle furnace and roast it at 650°C for 2 hours, then cool it down to room temperature naturally in a drying dish to obtain the modified microwave activated carbon adsorbent.

[0031] (4) Take 2.0 g of modified microwave activated carbon adsorbent, and absorb and separate CO at 25 °C2 and CH 4 gas, CO 2 and CH 4 The volu...

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PUM

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Abstract

The invention discloses a method for preparing a modified microwave activated carbon sorbent. The method is characterized in that microwave activated carbon is taken as the carrier, loading alkaline metal ions K are taken as active components for modification, and the modified microwave activated carbon sorbent is prepared through adoption of ultrasonic wave equivalent impregnation. The method provided by the invention is simple, easy to operate and low in cost; and the sorbent prepared through the method has a good sorption effect, and more adsorption equilibrium selection factors of CO2 / CO4 can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a modified microwave activated carbon adsorbent, in particular to a method for adsorbing and separating CO 2 and CH 4 The invention discloses a preparation method of a modified activated carbon adsorbent, which belongs to the technical field of gas separation. Background technique [0002] At present, the energy crisis and environmental problems are becoming more and more serious, and many countries have successively developed and utilized biogas as energy. Biogas is a clean energy whose main component is CH 4 and CO 2 , usually CH in biogas 4 The content is about 60% ~ 70%, CO 2 The content is about 30% to 40%, in addition to a small amount of O 2 , N 2 and other gases. Recovery and utilization of CH in biogas from landfill 4 gas, it is technically and economically feasible, and it is a good way to reduce CH 4 An efficient route for the gas. A city's concentrated landfill has a large amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/04
Inventor 易红宏李芬容唐晓龙宁平彭金辉李云东何丹李凯
Owner KUNMING UNIV OF SCI & TECH
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