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Porous carbon nano fiber material for adsorbing carbon dioxide and preparation method thereof

A carbon dioxide and nanofiber technology, applied in the field of nanomaterials and environmental governance, can solve the problems of less micropore and ultramicropore content, small carbon dioxide adsorption capacity, and low specific surface area, and achieve fast adsorption kinetics and mild desorption conditions , the effect of ultra-high specific surface area

Active Publication Date: 2017-08-18
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the above-mentioned composite electrospun carbon nanofiber material as a carbon dioxide adsorbent, the specific surface area is low, the porosity is low, the content of micropores and ultramicropores is small, and the carbon dioxide adsorption capacity is small, etc., to provide a carbon dioxide adsorption. The carbon nanofiber material and its preparation method, while exempting from activation treatment, prepare a porous carbon nanofiber material with high specific surface area, high porosity, high micropore and ultramicropore content, improve its carbon dioxide adsorption capacity, and obtain Efficient carbon dioxide adsorbent

Method used

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  • Porous carbon nano fiber material for adsorbing carbon dioxide and preparation method thereof
  • Porous carbon nano fiber material for adsorbing carbon dioxide and preparation method thereof
  • Porous carbon nano fiber material for adsorbing carbon dioxide and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Porous carbon nanofiber material for carbon dioxide prepared from PAN and PMMA.

[0032] (1) Weigh ~20mg of PAN and PMMA polymer powders respectively, put them into crucibles respectively, place them in a thermogravimetric analyzer, and feed N at a flow rate of 60ml / min 2 The gas is heated to 1000°C at a heating rate of 5°C / min, and the thermogravimetric analyzer automatically records the weight loss of the two polymers. Its thermogravimetric curve, such as figure 1 shown; therefore, PAN as a carbon precursor, PMMA as an organic pore former.

[0033] (2) Weigh PAN and PMMA with a mass ratio of 1:1 and add them to DMF. Stir continuously at room temperature until the polymer is completely dissolved to form a uniform and transparent solution. The mass fraction of the spinning solution is 15%.

[0034] (3) Transfer the spinning solution prepared in step (2) into the syringe and connect it to the autosampler, connect the needle to a high-voltage power supply for electrospi...

Embodiment 2

[0040] Porous carbon nanofiber material for carbon dioxide prepared from PAN and PMMA.

[0041] (1) Weigh PAN and PMMA with a mass ratio of 1:1 and add them to DMF. At room temperature, stir continuously until the polymer is completely dissolved to form a uniform and transparent solution. The mass fraction of the spinning solution is 15%.

[0042] (2) Transfer the spinning liquid prepared in step (1) into the syringe and connect it to the autosampler, connect the needle to a high-voltage power supply for electrospinning, and use the receiving device to receive PAN / PMMA composite electrospinning Nanofiber membrane; the flow rate is 1ml / min, the spinning voltage is 17kv, and the distance between the needle and the receiver is 15cm.

[0043] (3) The electrospun composite nanofiber membrane obtained in step (2) was placed in a vacuum drying oven, and dried in vacuum at 90° C. for 12 hours to remove residual organic solvents.

[0044] (4) Place the nanofiber membrane dried in step...

Embodiment 3

[0048] Porous carbon nanofiber material for carbon dioxide prepared from PAN and PMMA.

[0049] (1) Weigh PAN and PMMA with a mass ratio of 1:1 and add them to DMF. At room temperature, stir continuously until the polymer is completely dissolved to form a uniform and transparent solution. The mass fraction of the spinning solution is 15%.

[0050] (2) Transfer the spinning liquid prepared in step (1) into the syringe and connect it to the autosampler, connect the needle to a high-voltage power supply for electrospinning, and use the receiving device to receive PAN / PMMA composite electrospinning Nanofiber membrane; the flow rate is 1ml / min, the spinning voltage is 17kv, and the distance between the needle and the receiver is 15cm.

[0051] (3) The electrospun composite nanofiber membrane obtained in step (2) was placed in a vacuum drying oven, and dried in vacuum at 90° C. for 12 hours to remove residual organic solvents.

[0052] (4) Place the nanofiber membrane dried in step...

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Abstract

The invention discloses a porous carbon nano fiber material for adsorbing carbon dioxide (CO2) and a preparation method thereof, and belongs to the field of nano materials and environmental treatment. The preparation method comprises the following steps of screening a carbon precursor and an organic pore-forming agent by thermogravimetry; compounding a spinning solution; obtaining a composite nano fiber film by an electrostatic spinning method; obtaining the porous carbon nano fiber material with an ultrahigh specific surface area through low-temperature preoxidation and high-temperature carbonization treatment. By using the method, the activation step in the conventional preparation of a carbon material can be avoided; the cost is low; the preparation process is simple; the pore structure for regulating and controlling the porous carbon nano fiber material can be selectively obtained. The invention provides a high-efficiency carbon dioxide adsorbent. The porous carbon nano fiber material has the ultrahigh specific surface area and ultrahigh porosity, has plentiful micropores and ultramicropores, is extremely beneficial to the adsorption of the carbon dioxide, and is enabled to be high in the adsorption capacity of the carbon dioxide; meanwhile, the material has advantages that the desorption condition is mild, the material can be repeatedly utilized, and the like, and is enabled to have favorable application prospect and environmental-treatment benefit in the field of the capture of the carbon dioxide.

Description

technical field [0001] The invention discloses a porous carbon nanofiber material for carbon dioxide adsorption and a preparation method thereof, belonging to the field of nanomaterials and environmental treatment. Background technique [0002] In recent years, the greenhouse effect has been a hot issue in the environmental field, mainly caused by the enrichment of greenhouse gases in the atmosphere. Carbon dioxide is an important component of greenhouse gases. With the increasing frequency of human economic activities and the massive consumption of fossil fuels, the concentration of carbon dioxide in the atmosphere is increasing year by year; the impact of the greenhouse effect on the global climate is becoming more and more serious, resulting in global warming, extreme Climate anomalies such as occur from time to time; therefore, the reduction of carbon dioxide emissions and the capture of carbon dioxide are extremely important. [0003] As a commonly used solid adsorbent...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/205B01J20/28023Y02C20/40
Inventor 熊瑶郑煜铭钟鹭斌
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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