Ordered mesoporous ZrO2 supported Ni catalyst and preparation method and application thereof
A catalyst and ordered mesoporous technology, which is applied to the ordered mesoporous ZrO2 supported Ni catalyst and its preparation, and the application fields of the catalytic conversion of lignin-derived phenols, which can solve the problems of poor stability, deactivation, and active components of Ni metal catalysts. It is easy to fall off and run off, and achieve the effect of large specific surface area, cost reduction, and enhanced thermal stability.
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Embodiment 1
[0027] A kind of ordered mesoporous ZrO 2 Support Ni catalyst, take the following steps to make:
[0028] (1) Dissolve 6g of zirconium n-butoxide and 2g of P123 in 30mL of absolute ethanol as solution A, wherein the specification of P123 is: average Mn~5800;
[0029] (2) Dissolve 0.45g nickel nitrate hexahydrate and 1g nitric acid in 1mL deionized water as solution B, make Ni in solution B 2+ and Zr in solution A 2+ The molar ratio is 0.1:1, and the nitric acid concentration is 65%;
[0030] (3) Slowly add solution B dropwise to solution A while vigorously stirring to obtain a sol, dry the sol in a drying oven at 40°C for 12 hours to obtain a gel, and then raise the temperature to 100°C for 12 hours to obtain a xerogel.
[0031] (4) After the dry gel is ground, it is placed in a tube furnace and heated to 400°C in air at a rate of 2°C / min and kept for 4 hours; then heated to 600°C at a flow rate of 100mL / min in hydrogen ℃, kept for 5h, the hydrogen is high-purity hydrogen ...
Embodiment 2
[0034] A kind of ordered mesoporous ZrO 2 Support Ni catalyst, take the following steps to make:
[0035] (1) Dissolve 5g of zirconium n-butoxide and 2.5g of P123 in 30mL of absolute ethanol as solution A, wherein the specification of P123 is: average Mn~5800;
[0036] (2) Dissolve 1.6g of nickel acetate tetrahydrate and 0.5g of nitric acid in 4mL of deionized water as solution B, and make Ni in solution B 2+ and Zr in solution A 2+ The molar ratio of 0.5:1, the nitric acid concentration is 65%;
[0037] (3) Slowly add solution B dropwise to solution A while vigorously stirring to obtain a sol, dry the sol in a drying oven at 40°C for 12 hours to obtain a gel, and then raise the temperature to 100°C for 12 hours to obtain a xerogel.
[0038] (4) After the dry gel is ground, it is placed in a tube furnace and heated to 400°C in air at a rate of 2°C / min and kept for 4 hours; then heated to 600°C at a flow rate of 100mL / min in hydrogen ℃, kept for 5h, the hydrogen is high-pur...
Embodiment 3
[0041] A kind of ordered mesoporous ZrO 2 Support Ni catalyst, take the following steps to make:
[0042] (1) Dissolve 8g of zirconium n-butoxide and 3g of P123 in 30mL of absolute ethanol as solution A, wherein the specification of P123 is: average Mn~5800;
[0043] (2) Dissolve 1g of nickel chloride hexahydrate and 2g of concentrated nitric acid in 6mL of deionized water as solution B, and make Ni in solution B 2+ and Zr in solution A 2+ The molar ratio of 0.2:1, the nitric acid concentration is 68%;
[0044] (3) Slowly add solution B dropwise to solution A while vigorously stirring to obtain a sol, dry the sol in a drying oven at 40°C for 12 hours to obtain a gel, and then raise the temperature to 100°C for 12 hours to obtain a xerogel.
[0045] (4) After the dry gel is ground, it is placed in a tube furnace and heated to 400°C in air at a rate of 2°C / min and kept for 4 hours; then the temperature is raised to 600°C at a rate of 100mL / min in hydrogen gas , kept for 5h, th...
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