Preparation method of catalyst for preparing olefin from synthetic gas
A catalyst and synthesis gas technology, which is applied in the field of high activity and stability supported iron-based synthesis gas to low-carbon olefin catalyst and its preparation, can solve the problem that the activity stability of the low-carbon olefin catalyst needs to be further improved, the catalyst cost is high, and the CO conversion problems such as low rate, to achieve the effect of outstanding comprehensive performance, improved conversion rate, and improved selectivity
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example 1
[0025] Weigh commercially available alumina (pore volume is 0.96ml / g, specific surface area is 286.81m 2 / g, saturated water absorption is 145ml / g, provided by Fushun Branch of Sinopec Catalyst Co., Ltd., the following examples and comparative examples all use the alumina), the mass concentration is 5% ammonium carbonate aqueous solution saturated spray dipping oxidation Aluminum, immediately after drying at 95°C for 1 hour, the adsorption capacity of the dried ammonium carbonate aqueous solution is 60% of the saturated absorption solution of the alumina carrier, aging at 60°C for 7 hours, drying at 100°C for 24 hours, and then drying at 300°C Calcined for 5 hours to prepare a modified alumina carrier. The above-mentioned modified alumina carrier was impregnated with an aqueous zinc nitrate solution with a mass fraction of 5% by unsaturated spray impregnation method, the immersion temperature was 50°C, the immersion time was 3h, the impregnation amount was 20% of the saturated ...
example 2
[0028] Weigh commercially available alumina, saturate spray and impregnate alumina with a mass concentration of 20% ammonium acetate aqueous solution, and immediately dry at 110°C for 0.5h after drying until the adsorption amount of ammonium acetate aqueous solution is the amount of saturated absorption solution of the alumina carrier 40%, aged at 80°C for 4 hours, dried at 120°C for 8 hours, and then calcined at 400°C for 3 hours to obtain a modified alumina carrier. The above-mentioned modified alumina carrier is impregnated with an aqueous solution of zinc sulfate with a mass fraction of 10% by an unsaturated impregnation method. Dry for 10h, and bake at 900°C for 4h. The unsaturated carrier after roasting is sprayed and dipped in morphine aqueous solution. The spray volume of morphine aqueous solution is 10% of the total saturated water absorption of the carrier used. The mass content of morphine in the morphine aqueous solution is 2% of the carrier mass. Dry at 90°C for ...
example 3
[0030] Except that 5% ammonium citrate was added to the impregnated ferric nitrate aqueous solution, the rest was the same as in Example 1, and the prepared catalyst was denoted as C-3, and the 300h evaluation results were shown in Table 1.
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