Preparation method for double-functionalized KIT-6/ZSM-5 for adsorbing carbon dioxide in smoke

A technology of carbon dioxide and KIT-6, applied in the field of materials, can solve the problems of no research reports and achieve the effects of less environmental pollution, low production cost, and easy operation

Inactive Publication Date: 2017-11-24
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far there is no information on the use of microporous-mesoporous composite molecular sieve KIT-6 / ZSM-5 as the carrier, triaminosilane coupling agent as the primary modifier in the grafting process, tetraethylenepentamine (TEPA) or polyethylene Amine (PEI) is the secondary modifier in the impregnation process, and the method of grafting first and then impregnating is used to synthesize the bifunctional KIT-6 / ZSM-5 composite molecular sieve, and there is no report on the bifunctional KIT-6 / ZSM Research Report on Adsorption of Carbon Dioxide in Flue Gas by -5 Composite Molecular Sieve

Method used

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  • Preparation method for double-functionalized KIT-6/ZSM-5 for adsorbing carbon dioxide in smoke
  • Preparation method for double-functionalized KIT-6/ZSM-5 for adsorbing carbon dioxide in smoke
  • Preparation method for double-functionalized KIT-6/ZSM-5 for adsorbing carbon dioxide in smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the preparation of KIT-6 / ZSM-5 composite molecular sieve

[0023] Mix 16.87ml H 2 O and 4.54g tetrapropylammonium hydroxide (TPAOH), stirred at room temperature and 350r / min for 0.5h, added 0.167g aluminum isopropoxide and stirred evenly. Then 13.6ml tetraethyl orthosilicate (TEOS) was gradually added into the solution, vigorously stirred at 35°C and 450r / min for 2h, then aged in an autoclave at 150°C for 10h, cooled to room temperature, and the S 1 . Dissolve 4 g of P123 in 125 ml of H 2 O and 6.36ml of HCl, stirred at 35°C and 350r / min for 2h, then added 4.95ml of n-butanol (BuOH), continued to stir for 1h, and recorded the mixed solution as S 2 . Will S 1 Evenly added dropwise to S 2 In order to prepare a gel with a certain molar composition, the final gel molar composition is TEOS:P123:BuOH:HCl:Al:H 2 O=1:0.017:1.31:1.83:0.02:195:0.138. The gel was continuously stirred at 40°C and 450r / min for 24h, then transferred to the reactor, heated at 10...

Embodiment 2

[0024] Example 2: Preparation of KIT-6 / ZSM-5 grafted with triaminosilane coupling agent

[0025] Add 1 g of the KIT-6 / ZSM-5 composite molecular sieve obtained in Example 1 into a round-bottomed flask equipped with 60 ml of toluene and mix well, then add 1 ml of triaminosilane with a density close to 1.0 g / ml with a pipette gun The above mixed sample was heated and condensed to reflux for 12 hours, vacuum filtered and washed repeatedly with absolute ethanol. Finally, the slurry obtained after suction filtration was dried in an oven at 100° C. for 12 hours to obtain KIT-6 / ZSM-5 grafted with a triaminosilane coupling agent.

Embodiment 3

[0026] Example 3: Preparation of bifunctional KIT-6 / ZSM-5

[0027] Add 700 mg of the KIT-6 / ZSM-5 grafted with the triaminosilane coupling agent obtained in Example 2 into a conical flask filled with 25 ml of absolute ethanol and mix well, add 300 mg of TEPA or PEI with a mass fraction of 30% , mixed evenly, placed in a magnetic heating stirrer, stirred at 400r / min and room temperature for 7h, then placed in an oven at 80°C to evaporate the solvent, then placed in a ventilated drying oven, and dried at 100°C to obtain a bifunctional KIT -6 / ZSM-5.

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Abstract

The invention discloses a preparation method for double-functionalized KIT-6 / ZSM-5 for adsorbing carbon dioxide in smoke. The method comprises the following steps: grafting a silane coupling agent and diethylenetriamine propyl trimethoxysilane (AAAPTS) of which the mass rate to the KIT-6 / ZSM-5 is 1.0 on a KIT-6 / ZSM-5 composite molecular sieve, and impregnating TEPA or PEI with 30%-60% of the mass fraction on the triamido-grafted KIT-6 / ZSM-5 composite molecular sieve, and synthesizing the double-functionalized KIT-6 / ZSM-5 composite molecular sieve. The method of first grafting and second impregnating is used for effectively fixing the amido on the high-stability double-advantage micropore-mesopore composite molecular sieve combined with a reconcilable micropore material with the larger mesopore diameter. The stability and adsorptive property of the material are strengthened. The production condition of the preparation process of the adsorbent is simple, the operation is convenient, the production cost is low, the adsorption effect is good, the environment pollution is small, and the adsorbent has the good application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a bifunctional KIT-6 / ZSM-5 for absorbing carbon dioxide in flue gas. Background technique [0002] Since the Industrial Revolution, human activities have increased carbon dioxide emissions year by year, causing global average temperature rises and average altitude increases, affecting the health of humans, animals and plants. Therefore, how to reduce the emission of carbon dioxide in flue gas is an important environmental protection work. Common carbon dioxide separation technologies include ammonia solution absorption, cryogenic distillation, porous solid adsorption, and membrane purification. Among them, the porous solid adsorption method has become a promising method for adsorbing carbon dioxide due to the advantages of low price of adsorbent, fast adsorption / desorption rate, long service life, and renewable cycle. [0003] Since the adv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/26B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/18B01J20/22B01J20/265Y02C20/40
Inventor 魏建文林志峰耿琳琳梅德均刘乐乐廖雷
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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