Desulfurization method and system
A technology of sulfur capacity and molecular sieve, which is applied in the field of desulfurization, can solve the problems that it is difficult to balance desulfurization rate and penetration sulfur capacity, and achieve good adsorption, good regeneration performance, and the effect of promoting development
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[0047] The method for preparing the molecular sieve compound involved in the present invention comprises: in the presence of a solvent, kneading, molding, and drying the precursor of aluminum, the precursor of alkaline earth metal, the rare earth modified molecular sieve and an optional non-metallic binder and roasting, wherein, the rare earth modified molecular sieve is a molecular sieve doped with rare earth elements, and the amount of the aluminum precursor, the alkaline earth metal precursor and the rare earth modified molecular sieve makes the aluminum element, alkaline earth metal in the obtained molecular sieve composite The weight ratio among the element, the rare earth element and the molecular sieve is (8-35):(0.5-3):(2.5-10):100, wherein the weights of the aluminum element, the alkaline earth metal element and the rare earth element are calculated as oxides.
[0048] According to the method for preparing the molecular sieve composite of the present invention, the amo...
Embodiment 1
[0159] Take by weighing 800g of molecular sieve former powder (NaY molecular sieve, silicon-aluminum ratio is 5, specific surface area is 850m 2 / g, the pore volume is 0.32ml / g) is placed in a beaker, and distilled water is added to make the water / molecular sieve weight ratio reach about 8. Weigh 76g cerium chloride (CeCl 3 ·6H 2 O), 30g lanthanum chloride (LaCl 3 ) to make rare earth chloride solution. Add the rare earth chloride solution into the beaker and stir evenly, adjust the pH value to about 4 with hydrochloric acid, place the beaker in a water bath and heat it to about 80°C, exchange for 1 hour while stirring, and the exchange process ends. Cool, filter, wash, dry. In order to increase the exchange depth of the rare earth ions, the molecular sieve after the first exchange was calcined at 550° C. for 4 hours. After roasting, the molecular sieve is exchanged twice according to the above method to obtain a modified molecular sieve.
[0160] Gained modified molecul...
Embodiment 2-7
[0163] The adsorbent was prepared according to the various steps and conditions of Example 1, only the composition, preparation conditions or concentration of the impregnation solution were changed. The specific preparation conditions are shown in Table 1. The contents of each metal oxide and molecular sieve in the final adsorbent product are shown in Table 2. As shown, the measurement results of the specific surface area and the like are shown in Table 4.
[0164] Table 1
[0165]
[0166] Table 2
[0167] Example number al 2 o 3
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