Dehydrogenation catalyst and preparation method thereof
A technology for dehydrogenation catalysts and hydrogen storage materials, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor stability, low activity, and easy coking, and achieve high dispersion and high activity , to avoid the effect of coking
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Embodiment 1
[0050] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 15ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.
[0051] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.
[0052] The obtained catalyst is ground into a particle size of 12-20 mesh, evaluated in an isothermal fixed-bed reactor...
Embodiment 2
[0056] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 19ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.
[0057] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.
[0058] Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.
Embodiment 3
[0060] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 33ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.
[0061] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.
[0062] Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.
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