A kind of hydrogen selective oxidation catalyst and preparation method thereof
An oxidation catalyst and selective technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of high loss rate of hydrocarbons, large loading of precious metals, poor reaction stability, etc., to reduce Effects of production cost, narrow particle size distribution, and easy process control
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Embodiment 1
[0027] The preparation method of the hydrogen selective oxidation catalyst of this embodiment includes the following steps:
[0028] (1) Add HCl, anhydrous ethanol and templating agent to water in sequence, heat to 50℃ and stir for 40min; under stirring at 2500r / min, slowly add TEOS and nickel acetylacetonate to the above system, after the addition is complete Continue to stir for 12h;
[0029] The above template is a mixture of P123 and 1-butyl-3-methylimidazole leucine salt, and the molar ratio of P123 to 1-butyl-3-methylimidazole leucine salt in the mixture is 2:1 ;
[0030] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(Ni source): n(SiO 2 Source): n (templating agent): n (HCl): n (H 2 O): n (ethanol) = 0.1:1:0.01:6:10:135, sealed and moved into an oven at 100°C for 26h, the resulting system was filtered, and the resulting filter cake was washed and dried at 2°C The heating ra...
Embodiment 2
[0036] The preparation method of the hydrogen selective oxidation catalyst of this embodiment includes the following steps:
[0037] (1) Add HCl, anhydrous ethanol and templating agent to water in sequence, heat to 70℃ and stir for 30min; under stirring at 1000r / min, slowly add TEOS and nickel acetylacetonate to the above system, after the addition is complete Continue stirring for 36h;
[0038] The above template is a mixture of P123 and 1-butyl-3-methylimidazole leucine salt, and the molar ratio of P123 to 1-butyl-3-methylimidazole leucine salt in the mixture is 2:1 ;
[0039] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(Ni source): n(SiO 2 Source): n (templating agent): n (HCl): n (H 2 O): n (ethanol) = 0.3:1:0.05:6:15:135, sealed and moved into an oven at 130°C for 24h, the resulting system was filtered, and the resulting filter cake was washed and dried at 5°C The heating r...
Embodiment 3
[0045] The preparation method of the hydrogen selective oxidation catalyst of this embodiment includes the following steps:
[0046] (1) Add HCl, anhydrous ethanol and templating agent to water in sequence, heat to 60℃ and stir for 35min; under stirring at 1500r / min, slowly add TEOS and nickel acetylacetonate to the above system, after the addition is complete Continue stirring for 20h;
[0047] The above template is a mixture of P123 and 1-butyl-3-methylimidazole leucine salt, and the molar ratio of P123 to 1-butyl-3-methylimidazole leucine salt in the mixture is 2:1 ;
[0048] (2) Transfer the system obtained in step (1) to a hydrothermal reactor, where the components and their molar ratios in the hydrothermal reactor are n(Ni source): n(SiO 2 Source): n (templating agent): n (HCl): n (H 2 O): n (ethanol) = 0.1:1:0.02:6:12:135, sealed and moved into an oven at 120°C for 25h, the resulting system was filtered, and the resulting filter cake was washed and dried at 3°C The heating r...
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