Silica gel modified desulfurizer and its preparation method and application
A technology of silane modifier and desulfurizer, which is applied in chemical instruments and methods, silicon compounds, and other chemical processes, etc., can solve the problems of not improving sulfur capacity and desulfurization depth, and unable to meet the requirements of hydrogen sulfide desulfurization in coke oven gas. , to achieve the effect of excellent desulfurization performance
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Embodiment 1
[0028] Soak ordinary porous silica gel in the polar solvent acetone, put it in a thermostat, stir, and keep the temperature at 70°C for 3 hours; 2 , N 2 Purity>99%, take out the polarized silica gel, put it in a drying oven, keep the temperature at 80°C for 2.5 hours; put the dried polarized silica gel into the modifier, soak it in silane modifier B
[0029] In the middle, stir, keep the temperature at 90°C for 4 hours; pass N into the drying oven 2 , N 2 Purity>99%, take out the modified silica gel, put it into a drying oven, keep the temperature at 100°C for 3 hours, and obtain a silane-modified silica gel desulfurizer.
[0030] Described silane modifier is made according to the following steps:
[0031] 1) At room temperature, take silane C and put it into an organic container;
[0032] 2) Take alkylene oxide D, the volume of the alkylene oxide D is 1.1 to 1.5 times the volume of silane C;
[0033] 3) Mix the silane C with the alkylene oxide D, stir, and keep for 15-...
Embodiment 2
[0042] Soak ordinary porous silica gel in pyridine, put it into a thermostat, stir, and keep the temperature at 60°C for 4 hours; 2 , N 2 Purity >99%, take out the polarized silica gel, put it in a drying oven, keep the temperature at 90°C for 2.5 hours; put the dried polarized silica gel into the modifier, soak it in the silane modifier
[0043] In the middle, stir, keep the temperature at 90°C for 2.5 hours; pass N into the drying oven 2 , N 2 Purity>99%, take out the modified silica gel, put it into a drying oven, keep the temperature at 65°C for 4 hours, and obtain a silane-modified silica gel desulfurizer.
[0044] The modified silica gel desulfurizer prepared through the above steps is used for desulfurization treatment of coke oven gas. Coke oven gas indicators are as follows:
[0045] Hydrogen sulfide 800mg / Nm 3
[0046] Temperature 45°C
[0047] Pressure 12KPa (gauge pressure)
[0048] Coke oven gas is subjected to temperature swing adsorption separation opera...
Embodiment 3
[0050] Soak ordinary porous silica gel in tetrahydrofuran, put it into a thermostat, stir, and keep the temperature at 90°C for 6 hours; 2 , N 2 Purity>99%, take out the polarized silica gel, put it in a drying oven, keep the temperature at 140°C for 1 hour; put the dried polarized silica gel into the modifier, soak it in silane modifier B
[0051] In the process, stir and keep the temperature at 65°C for 6 hours; pass N into the drying oven 2 , N 2 Purity>99%, take out the modified silica gel, put it into a drying oven, keep the temperature at 145°C for 2.5 hours, and obtain a silane-modified silica gel desulfurizer.
[0052] The modified silica gel desulfurizer prepared through the above steps is used for desulfurization treatment of coke oven gas. Coke oven gas indicators are as follows:
[0053] Hydrogen sulfide 850mg / Nm 3
[0054] temperature 40°C
[0055] Pressure 9KPa (gauge pressure)
[0056] Coke oven gas is subjected to temperature swing adsorption separati...
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