Bimetal catalyst for hydrogenation dehydrogenation as well as preparation method and application of bimetallic catalyst
A bimetallic catalyst, hydrodehydrogenation technology, applied in the directions of metal/metal oxide/metal hydroxide catalyst, hydrogenation to hydrocarbon, molecular sieve catalyst, etc., can solve the problem of low activity and selectivity of hydrodehydrogenation catalyst, low cost It can improve the catalyst carbon deposition and coke deactivation, reduce the loss of the carrier, and improve the stability.
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[0018] The embodiment of the present application provides a specific method for preparing a bimetallic catalyst for hydrodehydrogenation, comprising the following steps:
[0019] 1) Dispersing the stabilizer, pore-forming agent and activator in the reaction medium to form an activation solution; the activator contains the first metal ion;
[0020] 2) uniformly mixing the carrier with the activation solution, and performing crystallization treatment to obtain an activated carrier;
[0021] 3) uniformly mixing the activated carrier with a solution containing a catalytically active metal ion, drying, and calcining to obtain a precursor; the catalytically active metal ion includes a noble metal ion and a second metal ion;
[0022] 4) reducing the precursor to prepare a bimetallic catalyst for hydrodehydrogenation.
[0023] In a specific embodiment, the stabilizer is selected from one or more of sodium citrate, sodium oxalate and sodium salicylate.
[0024] In a specific embodime...
Embodiment 1
[0066] This embodiment provides a method for preparing a bimetallic catalyst for hydrodehydrogenation, comprising the following steps:
[0067] 1) Weigh 0.2816g sodium citrate and 0.3825g tin chloride pentahydrate in 1.5ml deionized water to prepare solution A, then dissolve 8.2365g magnesium nitrate hexahydrate and 7.7171g urea in 18ml deionized water to prepare solution B , Add the prepared A solution and B solution dropwise to 10.0035g of porous alumina, stir at room temperature for 1h, transfer to a hydrothermal kettle, crystallize in an oven at 130°C for 12h, then suction filter, and then transfer to an oven for 80 After drying for 12 hours at °C, the catalyst carrier was obtained by grinding;
[0068] 2) Dissolve 0.1036g of nickel nitrate hexahydrate and 0.007g of platinum chloride in deionized water and stir evenly, add 10g of the carrier obtained in step 1) and stir for 12 hours at room temperature, then raise the temperature to 80°C, evaporate the water to dryness, an...
Embodiment 2
[0072] This embodiment provides a method for preparing a bimetallic catalyst for hydrodehydrogenation, comprising the following steps:
[0073] 1) Weigh 0.1462g sodium oxalate and 0.3173g nickel nitrate hexahydrate in 1.5ml deionized water to prepare solution A, then dissolve 8.2365g magnesium nitrate hexahydrate and 10.7944g sodium bicarbonate in 18ml deionized water to prepare solution B , Add the prepared A solution and B solution dropwise into 10.0035g molecular sieve SAPO-11, stir at room temperature for 1 hour, transfer to a hydrothermal kettle, crystallize in an oven at 100°C for 48 hours, then suction filter, and then transfer to an oven After drying at 80°C for 12 hours, the catalyst carrier was obtained by grinding.
[0074] 2) Dissolve 0.1036g of nickel nitrate hexahydrate and 0.007g of palladium chloride in deionized water and stir evenly, add 10g of the carrier obtained in step 1) and stir for 12 hours at room temperature, then raise the temperature to 80°C, evapo...
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