Catalytic cracking gasoline adsorption desulfurization catalyst and preparation method thereof
A catalytic cracking gasoline, adsorption desulfurization technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of large octane number loss, reduced adsorption activity, low sulfur capacity, etc., and achieve stability Good results
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Embodiment 1
[0021] Preparation of cerium-zirconium solid solution: Weigh 38.8g of cerium nitrate and 33.9g of zirconium nitrate according to the stoichiometric ratio and put them in a beaker to prepare a mixed solution, then add 4g of sodium polyacrylate, and drop into the mixed solution while stirring continuously Add ammonia water or sodium carbonate solution to carry out co-precipitation reaction, then filter with suction, dry, roast at 840°C for 6 hours, then crush and grind into powder.
[0022] The preparation of catalyst: (1) 67.4g nickel nitrate, 136g zinc nitrate are dissolved in nitric acid, and add 16g sodium polyacrylate, obtain the acid solution containing nickel zinc; (2) configuration contains the acid solution of 5.5g sodium polyacrylate, Add 23g ZSM-5 molecular sieve, 17g macroporous alumina, and 5.7g cerium-zirconium solid solution into the acid solution containing sodium polyacrylate, and stir evenly to obtain a mixture slurry containing ZSM-5 molecular sieve, macroporou...
Embodiment 2
[0024] The preparation of the cerium-zirconium solid solution is the same as in Example 1, and the preparation steps of the catalyst are the same as in Example 1. In terms of metal oxides, the mass percentage of the pore-enlarging agent in the acid solution containing nickel and zinc is higher than that containing ZSM-5 molecular sieve, macroporous The mass percentage of the pore-enlarging agent in the mixture slurry of alumina and cerium-zirconium solid solution is 3.2 times, and the composition of the catalyst is shown in Table 1.
Embodiment 3
[0026]The preparation of the cerium-zirconium solid solution is the same as in Example 1, and the preparation steps of the catalyst are the same as in Example 1. In terms of oxides, the mass percentage of the pore-enlarging agent in the acid solution containing nickel and zinc is higher than that containing ZSM-5 molecular sieve, macroporous oxidation The mass percentage of the pore-enlarging agent in the mixture slurry of aluminum and cerium-zirconium solid solution is 3.8 times. After the catalyst is obtained, the nickel salt and the zinc salt are dissolved in deionized water, the surface of the catalyst is impregnated, and then dried and calcined to obtain a catalyst modified by the nickel and zinc surfaces. The mass percent content of nickel oxide and zinc oxide on the surface of the catalyst is 0.9 times higher than the mass percent content of nickel oxide and zinc oxide inside the catalyst. The composition of the catalyst is shown in Table 1.
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