Vanadium oxide supported catalyst for alkane dehydrogenation
A technology for alkane dehydrogenation and catalysts, which is applied in the direction of carbon compound catalysts, catalysts, physical/chemical process catalysts, etc., and can solve problems such as low catalytic activity or service life, complex processing steps, and low conversion rate
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Embodiment 3
[0058] (vanadium oxide / K of the present invention 2 Synthesis of O-supported catalysts)
[0059] Purchased from Sasol with 137m 2 Spherical (~2.5 mm diameter) transitional alumina supports per g surface area were used for catalyst preparation. The alumina support (ca. 100 g) was heat treated in an oven at 120° C. for 16 hours in the presence of air. After cooling to room temperature, the dried alumina support was used to prepare the catalyst by incipient wetness impregnation method. The catalyst was prepared by incipient wetness impregnation of the support with an aqueous solution of vanadyl oxalate. The required amount of vanadyl oxalate (3.97 g) and potassium nitrate (0.39 g) was dissolved in water and used for incipient wetness impregnation. Impregnation was performed by contacting the impregnation solution (12.6 mL) with the alumina support (27.93 g) at room temperature. The impregnated alumina support was then kept at room temperature for 12 hours and then dried at 1...
Embodiment 4
[0061] (vanadium oxide / K of the present invention 2 Synthesis of O-supported catalysts)
[0062] Purchased from Sasol with 207m 2Spherical (~1.8 mm diameter) transition alumina per gram surface area was used for catalyst preparation. The alumina support (ca. 100 g) was heat treated in an oven at 120° C. for 16 hours in the presence of air. After cooling to room temperature, the dried alumina support was used to prepare the catalyst by incipient wetness impregnation method. The catalyst was prepared by incipient wetness impregnation of the support with an aqueous solution of vanadyl oxalate. The required amount of vanadyl oxalate (7.56 g) and the required amount of potassium nitrate (0.39 g) were dissolved in water (22.3 mL) and used for incipient wetness impregnation. Impregnation was performed by contacting the impregnation solution with an alumina support (26.2 g) at room temperature. The impregnated alumina support was then kept at room temperature for 12 hours and the...
Embodiment 5
[0064] (catalyst characterization)
[0065] The surface area (BET) of the catalyst was determined using a Micromeritics Tristar Surface Area and Porosity Analyzer (Micromeritics Instruments, Inc., USA). Before measurement, samples (~200 mg) were evacuated at 300 °C for 2 h to remove physically adsorbed water and subjected to N 2 physical adsorption. The surface area results are given in Table 1 (surface areas of Comparative Example 1 and Inventive Example 3) and Table 2 (surface areas of Comparative Example 2 and Inventive Example 4). It was determined from the data that the catalyst prepared using vanadyl oxalate as the vanadium oxide precursor had a higher surface area than the catalyst prepared using ammonium metavanadate dissolved in oxalic acid as the vanadium oxide precursor.
[0066] Table 1
[0067]
[0068]
[0069] Table 2
[0070]
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