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Preparation method and application of amine-modified hydrophobic activated carbon fiber adsorbent

An activated carbon fiber, hydrophobic technology, applied in the field of carbon capture, can solve the problems of poor selectivity and water resistance, and achieve the effect of improving adsorption selectivity and water resistance

Inactive Publication Date: 2021-12-14
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Activated carbon adsorbs CO 2 When there is the problem of poor selectivity and water resistance, the present invention uses aminosilane coupling agent solution to modify the activated carbon fiber, and then washes and dries to make the surface of the activated carbon fiber simultaneously through one-step reaction. Increase the amino functional groups and hydrophobic hydrocarbon chains to improve the CO 2 The adsorption selectivity and water resistance of the molecule are beneficial to the production of activated carbon fiber runners and the CO 2 The promotion and application of adsorption

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  • Preparation method and application of amine-modified hydrophobic activated carbon fiber adsorbent
  • Preparation method and application of amine-modified hydrophobic activated carbon fiber adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of preparation method of amine modified hydrophobic activated carbon fiber, such as figure 1 shown, including the following steps:

[0020] Step 1, configure a mixed solution of absolute ethanol and 18mol / L concentrated sulfuric acid at a volume ratio of 5:1, add 60% of the mixed solution weight to pre-cleaned and dried activated carbon fibers, and magnetically stir at 180r / min at 80°C under the reaction;

[0021] Step 2, after the reaction is finished, after cooling down to room temperature, wash and dry with absolute ethanol to obtain oxidatively modified activated carbon fiber (OACF);

[0022] Step 3, the oxidized modified activated carbon fiber (OACF) obtained in step 2 and the cyclohexane solvent are added in the there-necked flask in a volume ratio of 1:3, stirred evenly, and 50wt% of activated carbon fiber with hydrophobicity is added dropwise under stirring conditions. and CO 2 Adsorb the selective aminosilane coupling agent KH-550, heat up for reflux ...

Embodiment 2

[0025] A preparation method for amine-modified hydrophobic activated carbon fibers, comprising the following steps:

[0026] Step 1, configure a mixed solution of absolute ethanol and 18mol / L concentrated sulfuric acid at a volume ratio of 5:1, add 60% of the mixed solution weight to pre-cleaned and dried activated carbon fibers, and magnetically stir at 180r / min at 80°C under the reaction;

[0027] Step 2, after the reaction is finished, after cooling down to room temperature, wash and dry with absolute ethanol to obtain oxidatively modified activated carbon fiber (OACF);

[0028] Step 3, the oxidized modified activated carbon fiber (OACF) obtained in step 2 and the cyclohexane solvent are added in the there-necked flask in a volume ratio of 1:3, stirred evenly, and 50wt% of activated carbon fiber with hydrophobicity is added dropwise under stirring conditions. and CO 2 Adsorb selective aminosilane coupling agent KH-602, heat up for reflux reaction, then wash and dry the sa...

Embodiment 3

[0031] A preparation method for amine-modified hydrophobic activated carbon fibers, comprising the following steps:

[0032] Step 1, step 1, configure a mixed solution of absolute ethanol and 18mol / L concentrated sulfuric acid at a volume ratio of 5:1, add 60% of the mixed solution weight to pre-cleaned and dried activated carbon fibers, and magnetically stir at 80°C React at 180r / min;

[0033] Step 2, after the reaction is finished, after cooling down to room temperature, wash and dry with absolute ethanol to obtain oxidatively modified activated carbon fiber (OACF);

[0034] Step 3, the oxidized modified activated carbon fiber (OACF) that obtains in step 2 and hexanaphthene solvent are added in the there-necked flask by 1:3 volume ratio, stir evenly, drip the dropwise addition of activated carbon fiber 50wt% under stirring condition and have Hydrophobicity and CO 2 Adsorb selective aminosilane coupling agent KH-792, heat up for reflux reaction, then wash and dry the sample...

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Abstract

The invention discloses a preparation method and application of an amine-modified hydrophobic activated carbon fiber adsorbent. The preparation method comprises the following steps: 1, preparing a mixed solution from absolute ethyl alcohol and concentrated acid according to a volume ratio of 5: 1, adding activated carbon fibers which are washed and dried in advance and account for 60% of the weight of the mixed solution, and carrying out a reaction under the condition of 80 DEG C and magnetic stirring at 180 r / min; 2, after the reaction in the step 1 is finished, cooling to room temperature, washing and drying to obtain oxidation modified activated carbon fibers; and 3, adding the oxidation modified activated carbon fibers obtained in the step 2 and a cyclohexane solvent into a container according to a volume ratio of 1: 3, uniformly stirring, dropwise adding a silane coupling agent accounting for 50% of the weight of the activated carbon fiber under a stirring condition, heating to 70 DEG C, carrying out a reflux reaction for 6 h, and washing and drying a sample to obtain the final product.

Description

technical field [0001] The invention belongs to the technical field of carbon capture, in particular to a preparation method of an amine-modified hydrophobic activated carbon fiber adsorbent and its use in CO 2 application in capture. Background technique [0002] Sustained large amounts of CO 2 Emissions lead to the intensification of global climate change, and countries around the world have begun to gradually strengthen carbon emission reduction through a variety of administrative, economic and technical means. In the context of the global joint response to climate change, carbon capture is regarded as an important solution to reduce greenhouse gas emissions. Among the many carbon capture technologies, the absorption method has the advantages of mature technology, simple process and equipment, but there are also problems such as high energy consumption of absorbent regeneration and easy corrosion of equipment, which limit its industrial application. Compared with the a...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01J20/28B01D53/02
CPCB01J20/20B01J20/22B01J20/28023B01D53/02B01J2220/4806B01J2220/4812B01J2220/46B01D2253/102B01D2253/20B01D2257/504Y02C20/40
Inventor 宋夫交李娜许琦陈天明曹燕杨百忍严金龙
Owner YANCHENG INST OF TECH