A kind of monolithic propane catalytic combustion catalyst and preparation method thereof
A monolithic catalyst and catalytic combustion technology, applied in the field of a propane catalytic combustion monolithic catalyst, can solve problems such as narrow application range, and achieve the effects of low cost, easy control, and improved activity and stability
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Embodiment 1
[0022] Prepare 0.5mol / L sodium carbonate and cobalt nitrate aqueous solutions respectively, and add 0.5mol / L sodium carbonate solution dropwise to 0.5mol / L cobalt nitrate aqueous solution under the condition of stirring at 50°C, and continue stirring for 0.5h The precipitate was filtered and washed, dried at 50°C for 12 hours, ground into powder, calcined at 300°C for 2 hours, and the catalyst was passed through a 100-mesh sieve as an active component for future use.
Embodiment 2
[0024] Weigh 0.25g of the cobalt tetroxide powder catalyst prepared in Example 1 and add it to 18g of deionized water, ultrasonically disperse it for 10-15 minutes and then add 10.25g of γ-Al 2 o 3 Continue ultrasonic dispersion for 10-15 minutes, place the dispersed suspension on a magnetic stirrer and add 1.5g pseudo-boehmite while stirring, add 1mol / L nitric acid aqueous solution to adjust the pH to 3-4, and continue stirring for 0.5h -1h; under vacuum conditions, the slurry was coated on the cordierite honeycomb ceramic carrier (diameter 6.25mm × height 50mm, volume 1.5mL) after ultrasonic cleaning; Roast 4h in ℃ of air, make fresh catalyst 1#; Slurry solid content, catalyst coating rate and its use in propane catalytic oxidation activity (T 50 , the reaction temperature when the conversion rate is 50%; T 90 , the reaction temperature when the conversion rate is 90%) are shown in Table 1, Table 2 and Table 3 respectively.
Embodiment 3
[0026] Weigh 0.5g of the cobalt tetroxide powder catalyst prepared in Example 1 and add it to 18g of deionized water, ultrasonically disperse it for 10-15 minutes and then add 10g of γ-Al 2 o 3 Continue ultrasonic dispersion for 10-15 minutes, and other preparation processes are the same as in Example 2 to obtain catalyst 2#. See Table 1, Table 2 and Table 3 for the solid content of slurry, catalyst coating rate and its catalytic activity for propane oxidation.
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