Hydrogen selective oxidation catalyst used in propane dehydrogenation process and preparation method thereof
An oxidation catalyst, propane dehydrogenation technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low hydrogen conversion rate and oxygen conversion rate , to achieve the effect of good catalytic activity, good technical effect and high oxygen conversion rate
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Embodiment 1
[0025] According to the weight ratio of nano-alumina and metal oxide is 80:20, take 2 grams and the specific surface is 50 meters 2 / g, Al with a pore size of 29 nm 2 o 3 and 0.8477 g Bi(NO 3 ) 3 Put it into a 500ml beaker, add 50ml of 1 mol / L dilute nitric acid, dissolve it by ultrasonication for 30 minutes, put the sample into the reaction kettle, seal it and carry out hydrothermal reaction at 120°C for 12 hours, and wait for cooling after the reaction is completed After reaching room temperature, take out the sample, wash it with water, and suction filter until the filtrate is neutral. After drying in a blast drying oven at 100°C for 6 hours, move it into a muffle furnace and roast at 550°C for 4 hours to obtain the desired metal oxide. catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: the selectivity of hydrogen in the process was 68%, the conversion rate of oxygen was...
Embodiment 2
[0027] According to the weight ratio of nano-alumina and metal oxide is 90:10, take 2 grams of specific surface to be 50 meters 2 / g, Al with a pore size of 29 nm 2 o 3 and 0.3768 g Bi(NO 3 ) 3 Put it into a 500ml beaker, add 50ml of 1 mol / L dilute nitric acid, dissolve it by ultrasonication for 30 minutes, put the sample into the reaction kettle, seal it and carry out hydrothermal reaction at 120°C for 12 hours, and wait for cooling after the reaction is completed After reaching room temperature, take out the sample, wash it with water, and suction filter until the filtrate is neutral. After drying in a blast drying oven at 100°C for 6 hours, move it into a muffle furnace and roast at 550°C for 4 hours to obtain the desired metal oxide. catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: the selectivity of hydrogen in the process was 71%, the conversion rate of oxygen was 9...
Embodiment 3
[0029] According to the weight ratio of nano-alumina and metal oxide is 50:50, take 2 grams of specific surface as 50 meters 2 / g, Al with a pore size of 29 nm 2 o 3 and 3.3907 g Bi(NO 3 ) 3Put it into a 500ml beaker, add 50ml of 1 mol / L dilute nitric acid, dissolve it by ultrasonication for 30 minutes, put the sample into the reaction kettle, seal it and carry out hydrothermal reaction at 120°C for 12 hours, and wait for cooling after the reaction is completed After reaching room temperature, take out the sample, wash it with water, and suction filter until the filtrate is neutral. After drying in a blast drying oven at 100°C for 6 hours, move it into a muffle furnace and roast at 550°C for 4 hours to obtain the desired metal oxide. catalyst. The prepared catalyst was loaded into a fixed-bed reactor, and the activity evaluation was carried out at 550°C. The results were as follows: the selectivity of hydrogen in the process was 77%, the conversion rate of oxygen was 98.2%...
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