Adsorbent for adsorbing n-alkanes and preparation method and application thereof
A technology of n-paraffin and adsorbent, which is applied in the field of modified 5A molecular sieve adsorbent and its preparation, can solve the problems affecting selective adsorption performance, orifice effect, etc., and achieve the effect of improving selective adsorption performance
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Embodiment 1
[0028] (1) Weigh an appropriate amount of spherical 5A molecular sieve ((commercial goods, the main properties are as follows: specific surface: 680cm 2 / g Pore volume: 0.18cm 3 / g, average pore diameter: 1.7nm, particle diameter: 1.6mm~2.3mm), the 5A molecular sieve was protected and impregnated with a glucose solution with a mass concentration of 10%, dried at 110°C for 3h after impregnation, and roasted at 450°C for 4h under a nitrogen atmosphere. ;
[0029] (2) Under the condition of 60°C, saturate and impregnate the material in step 1 with a 35% ammonium carbonate aqueous solution by mass for 1 hour;
[0030] (3) The material in step (2) was vacuum-dried at 120° C. for 4 hours, calcined at 600° C. for 4 hours, and calcined in an air atmosphere to obtain a modified 5A molecular sieve.
[0031] Static performance evaluation of modified 5A molecular sieve adsorbent: After drying, the modified 5A molecular sieve adsorbent was activated at 350°C for 2 hours, and cooled to ro...
Embodiment 2
[0034] (1) Weigh an appropriate amount of spherical 5A molecular sieve ((commercial goods, the main properties are as follows: specific surface: 680cm 2 / g Pore volume: 0.18cm 3 / g, average pore diameter: 1.7nm, particle diameter: 1.6mm~2.3mm), 5A molecular sieves were protected and impregnated with a sucrose solution with a mass concentration of 25%, dried at 140°C for 1h after impregnation, and roasted at 300°C for 8h under a nitrogen atmosphere. ;
[0035] (2) Under the condition of 90°C, saturate and impregnate the material in step (1) with a 20% aqueous solution of ammonium bicarbonate by mass for 1 hour;
[0036] (3) The material in step (2) was vacuum-dried at 80°C for 8 hours, calcined at 400°C for 8 hours, and calcined in an air atmosphere to obtain a modified 5A molecular sieve.
[0037] Static performance evaluation of modified 5A molecular sieve adsorbent: After drying, the modified 5A molecular sieve adsorbent was activated at 350°C for 2 hours, and cooled to ro...
Embodiment 3
[0040] (1) Weigh an appropriate amount of spherical 5A molecular sieve ((commercial goods, the main properties are as follows: specific surface: 680cm 2 / g Pore volume: 0.18cm 3 / g, average pore diameter: 1.7nm, particle diameter: 1.6mm~2.3mm), the 5A molecular sieve was protected and impregnated with a fructose solution with a mass concentration of 15%, dried at 125°C for 2.5h after impregnation, and roasted at 380°C under a nitrogen atmosphere 6h;
[0041] (2) Under the condition of 75°C, use a phosphoric acid aqueous solution with a mass content of 30% to saturate the impregnation treatment step (1 material 2h;
[0042] (3) The material in step (2) was vacuum-dried at 120°C for 8 hours, calcined at 500°C for 8 hours, and calcined in an air atmosphere to obtain a modified 5A molecular sieve.
[0043] Static performance evaluation of modified 5A molecular sieve adsorbent: After drying, the modified 5A molecular sieve adsorbent was activated at 350°C for 2 hours, and cooled ...
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