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A kind of hierarchical porous polymer, preparation and application in the adsorption and/or conversion of carbon dioxide
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A carbon dioxide and polymer technology, applied in educts, other chemical processes, chemical instruments and methods, etc., can solve the problems of unfavorable material transfer, limited application, poor adsorption capacity of microporous and nanoporous structure, and achieve rich mesoporous and The effect of micropores, rich functional groups, and enhanced adsorption capacity
Inactive Publication Date: 2019-07-16
CENT SOUTH UNIV
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[0006] Among the existing materials, most of the materials with high-efficiency adsorption capacity usually take advantage of their high proportion of microporous and nanoporous structure characteristics, but the microporous and nanoporous structure is not conducive to material transfer, which limits its application in the catalytic conversion of carbon dioxide.
On the other hand, materials with a high proportion of mesoporous and macroporous structures have poor adsorption capacity, although their mass transfer rate will increase
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Embodiment 1
[0087] Preparation of hierarchical polymer TFM
[0088] Weigh 0.387 g of tris(4-aldehyde phenyl)amine and 0.15 g of melamine, and measure 15 mL of dimethyl sulfoxide. The three were mixed in a 50 mL flask and dispersed uniformly by ultrasound. Blow with nitrogen for 15 minutes, then under the protection of nitrogen, continue to stir and react for 72 hours, where the reaction temperature is 180°C. After the reaction is complete, cool to room temperature, filter to obtain the precipitate formed by the reaction, wash the precipitate with excess acetone, tetrahydrofuran and dichloromethane respectively three times, and then freeze-dry the precipitate to finally obtain a yellow-white multi-porous polymer TFM, which The yield is 60% (see figure 1 ,2).
[0089] The elemental analysis is: C, 34.16, H, 4.48, N, 42.40, O, 17.68%.
[0090] The microporous structure content is 41.2%; the mesoporous structure content is 58.8%.
Embodiment 2
[0092] Hierarchical porous polymer Zn coordinated with zinc ions 2+ -Preparation of TFM
[0093] Weigh 50 mg of TFM prepared in Example 1 and 30 mg of zinc acetate. First, disperse zinc acetate in 50 mL of methanol. After the dispersion is uniform, add TFM to the solution while stirring vigorously. Then under the protection of nitrogen, the reaction was refluxed for 24 hours. After the reaction was completed, it was cooled to room temperature, and the precipitate was separated by centrifugation. Wash the precipitate with hot methanol several times, then freeze-dry it to obtain Zn 2+ -TFM. The loading of zinc ions is 1.44wt% (see figure 1 ,2).
Embodiment 3
[0095] TFM and Zn 2+ -TFM carbon dioxide adsorption
[0096] Weigh TFM and Zn respectively 2+ -TFM 100mg, and then use 99.999% carbon dioxide gas to test the gas adsorption capacity at 273K and 298K respectively on the gas adsorption instrument. Obtain the adsorption curve of carbon dioxide under 0~1bar (see image 3 ). It was found that under the condition of 1 bar pressure, the adsorption capacity of carbon dioxide reached 7.9 wt% at 273K. At 298K, its carbon dioxide adsorption capacity reached 5.5wt%.
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Abstract
The invention discloses a multi-stage porous polymer. The invention also discloses a preparation method of the multi-stage porous polymer as well as application to gas adsorption. In addition, the invention also discloses a polymer-based catalyst with catalytic activity, which is prepared by performing coordination on the multi-stage porous polymer and metal ions. For example, the catalyst is usedfor catalyzing cyclization of the carbon dioxide and an epoxy compound. The polymer takes a triazine ring as a carbon dioxide affiliative group and is applied to selective adsorption of the carbon dioxide, and the adsorption quantity of the arbon dioxide reaches to 7.9 percent by weight under 273 K. The polymer can effective enrich carbon dioxide molecules in a pore channel of the polymer to promote conversion of the carbon dioxide. The polymer-based catalyst is prepared by utilizing the coordination interaction of the polymer and zinc ions and serves as a catalyst for converting the carbon dioxide into a carbonate ester compound, and the catalytic conversion rate on epoxypropane and carbon dioxide cyclization reaction is up to 99 percent. The polymer and the metal complex thereof can bewidely applied to trapping and catalytic conversion of the carbon dioxide.
Description
Technical field [0001] The invention relates to the technical field of organic polymer application, in particular to the preparation of a triazine ring-containing hierarchical pore organic polymer and its application in the capture and conversion of carbon dioxide. Background technique [0002] In the past few decades, excessive emissions of carbon dioxide have led to the problem of global warming. This has also led to many other problems, such as extreme weather and acid rain. On the other hand, because of its low price, wide range of sources and non-toxicity, carbon dioxide can be used as a C1 chemical unit and converted into useful fine chemicals and chemical dyes. Therefore, in order to solve the global greenhouse effect and the availability of resources and other issues. The capture and conversion of carbon dioxide has attracted more and more attention. [0003] For the capture and conversion of carbon dioxide, many porous materials are used in this field. Such as zeolite,...
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