Nickel and zinc double metal catalyst and preparation method and application thereof
A bimetallic catalyst, nickel-zinc technology, applied in the field of nickel-zinc bimetallic catalyst and its preparation, can solve problems such as carbon deposition and deactivation, and achieve the effects of improved stability, strong interaction, and increased selectivity
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Embodiment 1
[0046] 1) Weigh 2.1810g of nickel nitrate, 0.7425g of zinc nitrate, 1.8757g of aluminum nitrate and 5g of urea and dissolve them in 80mL of water. The molar ratio of nickel, zinc and aluminum is 3:1:2. Put it into a high-pressure reactor; react at 120°C for 24 hours, take it out and centrifuge it, wash it with deionized water, dry it and store it in a sealed container to obtain nickel-zinc-aluminum hydrotalcite;
[0047] 2) The nickel-zinc-aluminum hydrotalcite of gained is placed in the atmosphere furnace, under hydrogen (H 2 ) at an initial heating rate of 2°C / min to 600°C, and the reduction reaction was carried out at this temperature for 5 hours. After the reaction was completed, hydrogen gas was continuously introduced and cooled to room temperature to obtain a NiZn bimetallic supported catalyst.
Embodiment 2
[0049] 1) Dissolve 1.4540g of nickel nitrate, 1.4850g of zinc nitrate, 1.8757g of aluminum nitrate and 5g of urea in 80mL of water. The molar ratio of nickel, zinc and aluminum is 1:1:1. Put it into a high-pressure reactor, react at 120°C for 24 hours, take it out and centrifuge it, wash it with deionized water, dry it, and store it in a sealed container to obtain nickel-zinc-aluminum hydrotalcite;
[0050] 2) the resulting nickel-zinc-aluminum hydrotalcite is placed in an atmosphere furnace, under H 2 After the temperature was raised to 600°C at an initial heating rate of 2°C / min, the reduction reaction was carried out at this temperature for 5 hours. After the reaction was completed, hydrogen was continuously passed in and cooled to room temperature to obtain a NiZn bimetallic supported catalyst.
Embodiment 3
[0052] 1) Weigh 0.7270g nickel nitrate, 2.2275g zinc nitrate, 1.8757g aluminum nitrate and 5g urea and dissolve them in 80mL of water. The molar ratio of nickel, zinc and aluminum is 1:3:2. Put it into a high-pressure reactor, react at 120°C for 24 hours, take it out and centrifuge it, wash it with deionized water, dry it, and store it in a sealed container to obtain nickel-zinc-aluminum hydrotalcite;
[0053] 2) the resulting nickel-zinc-aluminum hydrotalcite is placed in an atmosphere furnace, under H 2 After the temperature was raised to 600°C at an initial heating rate of 2°C / min, the reduction reaction was carried out at this temperature for 5 hours. After the reaction was completed, hydrogen was continuously passed in and cooled to room temperature to obtain a NiZn bimetallic supported catalyst.
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