Amine modified porous molecular sieve for efficiently capturing carbon dioxide as well as preparation method and application of amine modified porous molecular sieve
A carbon dioxide, molecular sieve technology, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve the problems of poor stability of organic amines, slow adsorption rate, low molecular sieve adsorption capacity, etc., to achieve good CO2 adsorption rate and Adsorption capacity, effect of increasing adsorption rate and adsorption capacity, increasing loading amount and loading rate
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Embodiment 1
[0030] The preparation process in this example is as follows. Measure 2 ml of triethylenetetramine, 3 ml of diethylenetriamine and 1 g of piperazine into a 50 ml conical flask, then add 6 ml of ethanol and 6 ml of water, stir and mix thoroughly , 0.464 g of magnesium chloride was added to the mixed solution, and the mixture was stirred for 2 hours to obtain a mixed solution. Weigh 5 grams of spherical Y-shaped molecular sieve, add it to the organic amine solution, and shake it in a shaker for 4 hours (40°C, 60 rpm); after suction filtration, place the obtained solid sample in a vacuum drying oven at 90°C After vacuum drying for 12 hours, an amine-modified porous molecular sieve capable of efficiently capturing carbon dioxide was obtained, denoted as A-Y. In this example, by adjusting the proportion of mixed amine and adding appropriate metal salt, the viscosity of the mixed amine liquid can be controlled, so that a higher content of amine can modify the surface and pores of th...
Embodiment 2
[0032] The preparation process in this example is as follows. Weigh 2 ml of triethylenetetramine and 4 ml of diethylenetriamine into a 50 ml conical flask, then add 6 ml of ethanol and 6 ml of water, stir and mix thoroughly, add to the mixed solution 0.5 g of manganese chloride was added, and the mixture was stirred for 2 hours to obtain a mixed solution. Weigh 5 grams of spherical sodium 4A molecular sieve particles, add them to the organic amine solution, and shake in a shaker for 24 hours (60°C, 60 rpm); after suction filtration, place the obtained solid sample in a vacuum drying oven Vacuum-drying at 90°C for 12 hours to obtain an amine-modified porous molecular sieve for efficiently capturing carbon dioxide, denoted as A-Na4A.
Embodiment 3
[0034] The preparation process in this example is as follows. Weigh 2 ml of triethylenetetramine and 1 g of piperazine into a 50 ml conical flask, then add 6 ml of ethanol and 6 ml of water, stir and mix thoroughly, and add 0.3 ml of ethanol to the mixture. g ferric nitrate, stirred for 2 hours to obtain a mixed solution. Weigh 5 grams of rod-shaped ZSM-5 molecular sieve particles, add them to the organic amine solution, and shake in a shaker for 24 hours (20°C, 60 rpm); after suction filtration, place the obtained solid sample into vacuum drying Vacuum-drying at 140° C. in an oven for 12 hours to obtain an amine-modified porous molecular sieve for efficiently capturing carbon dioxide, denoted as A-ZSM-5.
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