Method for capturing carbon dioxide from flue gas
A carbon dioxide and flue gas technology, applied in chemical instruments and methods, separation methods, alkali metal oxides/hydroxides, etc., can solve the problem of low adsorption capacity, achieve high removal depth, easy regeneration, and high selectivity sexual effect
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Embodiment 1
[0044] In a 50 mL round bottom flask, 241.6 mg (1 mmol) of Cu(NO 3 ) 2 ·3H 2 O and 197.9 mg (1 mmol) of (NH 4 ) 2 TiF 6 Dissolve in 14mL of water. In another 50 mL round bottom flask, 331.05 mg (1.3 mmol) of tris(4-pyridyl)amine (L1) was dissolved in 30 mL methanol. The methanol solution was added dropwise to the aqueous solution and stirred at 30°C for 48 hours to obtain a purple solid precipitate, which was filtered and washed with methanol. The above-mentioned solid was immersed in anhydrous methanol, and the anhydrous methanol was replaced every six hours for more than 3 times in total to remove the water molecules in the pores of the material, and the column cage metal organic framework material (CuTiF) was obtained. 6 ) 3 (L1) 4 .
[0045] (CuTiF 6 ) 3 (L1) 4 Grind into fine powder of uniform size, put it into an adsorption column with an inner diameter of 0.5 cm and a length of 5 cm, activate it at 120 °C for 10 hours, and at room temperature of 25 °C, pass ...
Embodiment 2
[0047] The adsorption column (inner diameter 0.5cm, length 5cm) of embodiment 1, at room temperature 25 ℃, the nitrogen / carbon dioxide gas mixture is passed into the adsorption column at 5mL / min, the nitrogen with extremely low carbon dioxide content is obtained in the first 26min, and the adsorption is stopped. At 50°C, the carbon dioxide gas was desorbed under vacuum. N 2 / CO 2 (v:v=85:15) mixture in (CuTiF 6 ) 3 (L1) 4 The penetration curve on the figure 2 shown.
Embodiment 3
[0049] In a 50 mL round bottom flask, 277.7 mg (1 mmol) of CuSiF 6 Dissolve in 14mL of water. In another 50 mL round bottom flask, 331.05 mg (1.3 mmol) of tris(4-pyridyl)amine (L1) was dissolved in 30 mL methanol. The methanol solution was added dropwise to the aqueous solution, and stirred at 30° C. for 48 hours to obtain a purple-red solid precipitate, which was filtered and washed with methanol. The above-mentioned solid was immersed in anhydrous methanol, and the anhydrous methanol was replaced every six hours for more than 3 times in total to remove the water molecules in the material holes to obtain a column cage-type metal organic framework material (CuSiF). 6 ) 3 (L1) 4 .
[0050] Grind the adsorbent into fine powder of uniform size, put it into an adsorption column with an inner diameter of 0.5 cm and a length of 5 cm, activate it at 120°C for 10 hours, and mix nitrogen / carbon dioxide (v:v=85:15) at room temperature of 25°C The gas was passed into the adsorption ...
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