Process for preparing catalyst for preparing propylene with propane dehydrogenation in carbonic anhydride condition and uses thereof
A carbon dioxide and propane dehydrogenation technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of poor stability, limitations, and high prices, and achieve good stability, low cost, and a preparation method simple effect
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example 1
[0021] Example 1: Zn(NO 3 ) 2 Soluble in water to make solution, Zn 2+ The concentration is 0.0021g / mL, and the HZSM-5 zeolite with a silicon-alumina ratio of 25 is treated with steam at 650°C for 6 hours, and then added to the above-mentioned Zn(NO 3 ) 2 In the solution, mix evenly to form a suspension, the liquid-solid ratio is 20mL / g when adding, heat and stir the suspension under an infrared lamp, evaporate to dryness, dry at 100°C for 24 hours, and roast at 600°C in an air atmosphere for 6 hours, Catalyst-1 was obtained, wherein the loading amount of the active component zinc oxide was 5 wt%. The reactivity of propane dehydrogenation under carbon dioxide atmosphere was determined in a continuous microreactor. The specific reaction conditions are as follows: the amount of catalyst is 0.2g, the reaction pressure is 1atm, the total flow rate of reaction gas is 20mL / min, wherein the flow rate of propane is 0.5mL / min, the flow rate of carbon dioxide is 1mL / min, and the res...
example 2
[0022] Example 2: Utilize the method of example 1 to measure catalyst-1 in CO 2 The stability of the propane dehydrogenation reaction under the atmosphere, after 30 hours of reaction, the yield of propylene was 20.3%, and the selectivity of propylene was 65.6%.
example 3
[0023] Example 3: Zn(CH 3 COO) 2 Soluble in water to make solution, Zn 2+ The concentration is 0.0014g / mL, the HZSM-5 zeolite with a silicon aluminum ratio of 25 is treated with steam at 600°C for 5 hours, and then added to the above Zn(CH 3 COO) 2 In the solution, mix evenly to form a suspension. When adding, the liquid-solid ratio is 30mL / g. The suspension is heated and stirred under an infrared lamp, evaporated to dryness, dried at 110°C for 12 hours, and roasted at 600°C in an air atmosphere for 8 hours. Catalyst-2 was obtained, wherein the loading amount of the active component zinc oxide was 5 wt%. Utilize the method of example 1 to measure its CO 2 Propane dehydrogenation activity under atmosphere. At steady state, the propylene yield on Catalyst-2 was 21.4%, and the propylene selectivity was 74.1%.
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