Preparation method of a fluorine-doped carbon-based adsorbent material that preferentially adsorbs ethane
An adsorption material, preferential adsorption technology, applied in selective adsorption, chemical instruments and methods, adsorption purification/separation, etc., can solve the problems of high energy consumption, low adsorption capacity and selectivity, etc., and achieve high adsorption capacity and reproducibility. Good, structurally stable effect
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Embodiment 1
[0030] (1) Dissolve 4g of starch in 40ml of water, carry out carbonization reaction at 180°C for 10h, and centrifuge the obtained product with deionized water and then dry to obtain crude carbon material;
[0031] (2) Mix 0.3g of carbon material and KOH in a mass ratio of 1:4, and grind it thoroughly. Add 0.3g of raw material tape to the solid mixture obtained by grinding to mix (the mass ratio of raw material tape to carbon material is 1 1) Put the mixed materials in a porcelain boat, put them in a high-temperature tube furnace, and control the heating rate to 5℃ / min under a nitrogen atmosphere, and then carry out the surface doping reaction with fluorine for 1h after rising to 800℃. After cooling, the crude fluorine-doped carbon-based adsorbent is washed with distilled water and dried to obtain a fluorine-doped carbon-based adsorbent, named as carbon 1#.
Embodiment 2
[0033] (1) Dissolve 2g of starch in 50ml of water, carry out carbonization reaction at 140°C for 24h, and centrifuge. The obtained product is centrifuged and washed with deionized water and then dried to obtain crude carbon material;
[0034] (2) Mix 0.3 g of carbon material and KOH at a mass ratio of 1:1, and grind it thoroughly. Add 1.8 g of raw material tape to the solid mixture obtained by grinding to mix (the mass ratio of raw material tape to carbon material is 6: 1) Put the mixed material in a porcelain boat, put it in a high-temperature tube furnace, and control the heating rate to 2°C / min in an argon atmosphere. After raising it to 550°C, perform a surface doping reaction with fluorine for 3h. After cooling, the crude fluorine-doped carbon-based adsorbent material is washed with distilled water and dried to obtain a fluorine-doped carbon-based adsorbent material, named as carbon 2#.
Embodiment 3
[0036] (1) Dissolve 1g of starch in 80ml of water, carry out carbonization reaction at 180°C for 4h, and centrifuge. The obtained product is centrifuged and washed with deionized water and dried to obtain crude carbon material;
[0037] (2) Mix 0.3g of carbon material and KOH in a mass ratio of 1:5, and grind it thoroughly, add 6g of raw material tape to the solid mixture obtained by grinding to mix (the mass ratio of raw material tape to carbon material is 20: 1) Put the mixed material in a porcelain boat, put it in a high-temperature tube furnace, and control the heating rate to 10°C / min under an argon-nitrogen mixed gas atmosphere, and then perform surface doping after rising to 850°C Fluorine reacts for 0.5h, and after cooling, the crude fluorine-doped carbon-based adsorbent is washed with distilled water and dried to obtain a fluorine-doped carbon-based adsorbent, named as carbon 3#.
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Abstract
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