Method for desulphurizing gasoline
A gasoline and removal technology, applied in chemical instruments and methods, refined hydrocarbon oil, petroleum industry, etc., to achieve the effects of strong controllability, refined gasoline desulfurization and high exchange degree
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[0022] Preparation of ammonium and hydrogen molecular sieves: first configure the concentration to 1mol·L -1 Then mix the synthesized NaBeta molecular sieve with the ammonium chloride solution in a solid-liquid ratio of 1:15, stir in a water bath at 90°C for ammonium exchange for 1 hour, and then filter with suction and fully use deionized water After washing until no chloride ions can be detected in the washing liquid (which can be measured with silver chloride solution), the filter cake is dried at 393K for 2h, and the second exchange is performed under the same conditions. After the two exchanges, 393K is dried to obtain an ammonium Beta molecular sieve. Further, the ammonium type Beta molecular sieve was calcined in a muffle furnace at 823K for 3 hours to prepare the hydrogen type Beta molecular sieve (Hβ).
[0023] Adsorption desulfurization experiment: room temperature and normal pressure conditions, completed on a fixed bed adsorption device. The adsorption column uses a t...
Embodiment 1
[0026] Accurately weigh 10g of hydrogen-type Beta molecular sieve, add 1.5g CuCl and 1.0g of cerium nitrate metal salt, respectively, and mix the mixture uniformly, and then conduct sufficient grinding for 30 minutes, and then transfer the mixture to a quartz tube reactor. Under the protection of nitrogen, the temperature program is used for solid-phase ion exchange reaction. The specific heating procedure for preparing the adsorbent is as follows. The flow rate of nitrogen is 50ml / min and the heating rate is 10℃ / min: room temperature is raised to 120℃, 120℃ Keep it at 350℃ for 2h; then keep it at 350℃ for 2h; keep it at 450-650℃ for 6h, and get Cu after natural cooling + / Ce 2+ Beta molecular sieve adsorbent for ion exchange. For model compounds for adsorption desulfurization, the maximum saturated sulfur capacity is 0.550mmol·g -1 , And the breakthrough sulfur capacity is 0.2500mmol·g -1 .
Embodiment 2
[0028] Accurately weigh 5g of hydrogen type Beta molecular sieve and add 1.0g AgNO respectively 3 After mixing with 1.0 g of cerium nitrate metal salt, the mixture was thoroughly ground for 30 minutes, and then the mixture was transferred to a quartz tube reactor. Under the protection of nitrogen, the temperature program is used for solid-phase ion exchange reaction. The specific heating procedure for preparing the adsorbent is as follows. The flow rate of nitrogen is 50ml / min and the heating rate is 10℃ / min: room temperature is raised to 120℃, 120℃ Keep it under pressure for 2h; then keep it at 350℃ for 2h; keep it at 450-650℃ for 6h, and get Ag after automatic cooling + / Ce 2+ Beta molecular sieve adsorbent for ion exchange. The maximum penetration sulfur capacity for desulfurization of the model compound is 0.2625mmol·g -1 , The saturated sulfur capacity is 0.5250mmol·g -1 .
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