A kind of propane dehydrogenation catalyst and preparation method thereof
A propane dehydrogenation and catalyst technology, applied in the direction of catalysts, carbon compound catalysts, chemical instruments and methods, etc., can solve problems such as segregation, loss of reactivity, high cost, etc.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] 1.1 Preparation of carrier
[0029] Weigh 6.44g of aluminum nitrate and dissolve it in 150mL of deionized water, add dropwise 0.6mL of triethylamine as a structure-directing agent, then add 1.96g of precipitant urea, stir for 0.5h; transfer the clear and transparent solution to a 180mL hydrothermal kettle , hydrothermally treated in an oven at 150°C for 48h; centrifuged, washed with water and ethanol to obtain a white precipitate, which was dried in an oven at 80°C for 12h; the white powder obtained after drying was roasted at 600°C for 2h to obtain γ-Al 2 o 3 Nanofibers, transmission electron microscope pictures as figure 1 Shown is a typical nanofiber-like morphology.
[0030] 1.2 Catalyst preparation
[0031] Dissolve 0.25 mg of phosphoric acid and 13.27 mg of chloroplatinic acid precursor in 642 μl of ethanol solution and impregnate an equal volume into the above 1 g Al 2 o 3 On the nanofiber carrier, after impregnation, let stand at room temperature for 2h, dr...
Embodiment 2
[0037] Weigh 13.27mg of chloroplatinic acid and 2.53mg of phosphoric acid, dissolve in 642 μl of ethanol solution, and impregnate equal volumes into 1gAl prepared in 1.1 of Example 1 2 o 3On the nanofiber carrier, after impregnation, let stand at room temperature for 2h, dry overnight at 50°C, and store in 20vol%O 2 / N 2 Calcined at 500°C for 4h in the atmosphere, then in 20vol%H 2 / N 2 Atmosphere, 590°C reduction for 2h, to obtain PtP / Al 2 o 3 Catalyst, take 100mgPtP / Al 2 o 3 Catalyst, evaluate propane dehydrogenation performance according to 1.3 in the embodiment 1, the results are shown in Table 2.
[0038] Table 2 PtP / Al obtained in Example 2 2 o 3 Catalyst propane conversion and propylene selectivity
[0039] Reaction time / h 0.5 1 1.5 2 2.5 3 4 6 Propane conversion / % 38.9 37.2 36.0 35.1 33.9 32.5 31.1 29.2 Propylene selectivity / % 92.1 93.7 93.9 94.4 94.8 95.3 95.6 96.0
Embodiment 3
[0041] Weigh 13.27mg of chloroplatinic acid and 12.5mg of phosphoric acid, dissolve in 642 μl of ethanol solution, and impregnate equal volumes into 1gAl prepared in 1.1 of Example 1 2 o 3 On the nanofiber carrier, after impregnation, let stand at room temperature for 2h, dry overnight at 50°C, and store in 20vol%O 2 / N 2 Calcined at 500°C for 4h in the atmosphere, then in 20vol%H 2 / N 2 Atmosphere, 590°C reduction for 2h, to obtain PtP / Al 2 o 3 catalyst. Take 100mgPtP / Al 2 o 3 Catalyst, evaluate propane dehydrogenation performance according to 1.3 in the embodiment 1, the results are shown in Table 3.
[0042] Table 3 PtP / Al obtained in Example 3 2 o 3 Catalyst propane conversion and propylene selectivity
[0043] Reaction time / h 0.5 1 1.5 2 2.5 3 4 6 Propane conversion / % 36.4 35.6 35.0 34.3 33.8 31.1 30.5 28.2 Propylene selectivity / % 92.3 93.1 94 94.6 95.1 95.7 96.1 96.7
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More