pt/α-moc 1-x Application of Supported Catalysts in Catalytic Hydrogenation
A supported catalyst, -moc1-x technology, applied in physical/chemical process catalysts, preparation of organic compounds, organic chemistry, etc., can solve problems such as increasing the cost of catalytic hydrogenation reactions
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Embodiment 1
[0061] Preparation of carrier α-MoC 1-x
[0062] Grind 1g of molybdenum trioxide to less than 60 mesh, place it in a quartz tube, program the temperature to 700°C in an ammonia gas reaction atmosphere, keep it for 1 hour, and then cool it down to room temperature in an ammonia gas reaction atmosphere; wherein, the heating rate is 10 °C / min, the flux of ammonia gas is 20mL / min;
[0063] Switch the reaction atmosphere to methane and hydrogen, program the temperature to 700°C, keep it for 1 hour, and then cool down to room temperature in the atmosphere of methane and hydrogen; wherein, the heating rate is 10°C / min, and the flux of methane and hydrogen is 20mL / Minutes, the volume ratio of methane and hydrogen is 3:7;
[0064] Switch the reaction atmosphere to a passivation atmosphere, program the temperature to 700°C, keep it for 1 hour, and then cool it down to room temperature in the passivation atmosphere; wherein, the heating rate is 10°C / min, and the flux of the passivatio...
Embodiment 2
[0066] Pt / α-MoC with 0.2% loading 0.8 Supported catalyst (referred to as 0.2%Pt / α-MoC 0.8 )Synthesis
[0067] The carrier α-MoC prepared by the method of Example 1 0.8 (0.2g) was put into a flask, and 10mL of deionized water was added to make the carrier all under the liquid surface. Dissolve 1 g of the platinum precursor salt chloroplatinic acid hexahydrate in 10 mL of water to prepare a Pt solution; take 25 μL of the Pt solution and add it to the carrier α-MoC 0.8 The flask was stirred for 2 hours, the water in the flask was evaporated with a rotary evaporator, and then the sample was placed in a freeze dryer to freeze-dry overnight. Then the catalyst precursor was in CH 4 / H 2 Carbonization in an atmosphere (the volume ratio of methane to hydrogen is 3:17), the temperature is raised to 300°C at a rate of 10°C / min, kept at 300°C for one hour, and then raised to 590°C at a rate of 10°C / min, and Leave on for 120 minutes. Finally, the loading was determined to be about 0...
Embodiment 3
[0069] Pt / α-MoC with 0.5% loading 0.8 Supported catalyst (referred to as 0.5%Pt / α-MoC 0.8 )Synthesis
[0070] The carrier α-MoC prepared by the method of Example 1 0.8 (0.2g) was put into a flask, and 10mL of deionized water was added to make the carrier all under the liquid surface. Dissolve 1 g of the platinum precursor salt chloroplatinic acid hexahydrate in 10 mL of water to prepare a Pt solution; take 25 μL of the Pt solution and add it to the carrier α-MoC 0.8 After stirring for 2 hours, the water in the flask was evaporated with a rotary evaporator, and then the sample was placed in a freeze dryer to freeze-dry overnight. Then the catalyst precursor was in CH 4 / H 2 Carbonization in an atmosphere (the volume ratio of methane to hydrogen is 3:17), the temperature is raised to 300°C at a rate of 10°C / min, kept at 300°C for 1 hour, and then raised to 590°C at a rate of 10°C / min, And keep it for 120 minutes. The loading was finally determined to be about 0.5% by ICP....
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