Mixed C3/C4 alkane dehydrogenation catalyst and preparation method thereof
A dehydrogenation catalyst and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of low activity of mixed low-carbon alkanes dehydrogenation catalysts
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Embodiment 1
[0032] Weigh 2 grams of SiO with a Si / Al ratio of 150 2 Carrier, add 10 ml of deionized water, pipette 0.18 ml of H 2 PtCl 6 solution, 1.80 ml of SnCl 4 solution, 3 mL NaNO 3 solution and 2.5 mL H 8 MON 2 o 4Solution, adjust the pH value of the solution to 1.5 with 2.5% ammonia water, then soak in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 550°C ℃ for 4 hours to obtain the desired catalyst. The mixed gas of propane and isobutane is adjusted by the mass flow meter, enters the preheating zone for mixing, and then enters the reaction zone. Both the preheating zone and the reaction zone of the reactor are heated by electric heating wires to make them reach the predetermined temperature. The stainless steel casing with an inner diameter of Ф9mm-Ф6mm and a length of about 400mm. After the reaction gas passes through the condensation tank, it enters the gas chr...
Embodiment 2
[0036] Weigh 2 grams of SiO with a Si / Al ratio of 150 2 Carrier, add 10 mL of deionized water, pipette 9 mL of H 2 PtCl 6 solution, 7.2 ml of SnCl 4 solution, 0.53 mL of KNO 3 solution and 2.0 mL of Nb(AC) 5 solution, use 2.5% ammonia water to adjust the pH value of the solution to 1, then soak in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample into a muffle furnace at 560°C ℃ for 4 hours to obtain the desired catalyst.
[0037] Catalyst evaluation conditions in the isothermal fixed-bed reactor are as follows: 0.5 g of catalyst is loaded into the above-mentioned isothermal fixed-bed reactor (the height of the catalyst bed is about 17mm), the reaction pressure is normal pressure, and the gas space velocity is 600 hours -1 , The reaction temperature is 560°C. The results are shown in Table 1.
[0038]
Embodiment 3
[0040] Weigh 2 grams of SiO with a Si / Al ratio of 150 2 Carrier, add 10 mL of deionized water, pipette 18 mL of H 2 PtCl 6 solution, 6 ml of Fe(NO 3 ) 3 solution, 30 ml of NaNO 3 solution and 1.5 mL Ta(AC) 5 Solution, adjust the pH value of the solution to 3.5 with 2.5% ammonia water, then soak in a water bath at 80°C for 1 hour, take out the sample for filtration, dry it in an oven at 120°C for 8 hours, and then put the sample in a muffle furnace at 560°C ℃ for 4 hours to obtain the desired catalyst.
[0041] Catalyst evaluation conditions in the isothermal fixed-bed reactor are as follows: 0.5 g of catalyst is loaded into the above-mentioned isothermal fixed-bed reactor (the height of the catalyst bed is about 17mm), the reaction pressure is normal pressure, and the gas space velocity is 600 hours -1 , The reaction temperature is 560°C. The results are shown in Table 1.
[0042]
PUM
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