A method for preparing high-activity nickel-based catalyst by using self-growing carbon nanotubes
A technology of nickel-based catalysts and carbon nanotubes, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc. Catalyst preparation costs are high, achieving the effects of low preparation cost, simple operation, and application promotion
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Embodiment 1
[0021] A method for preparing a highly active nickel-based catalyst by utilizing self-grown carbon nanotubes, the specific steps are as follows:
[0022] Preparation of Ni / α-Al by Impregnation 2 o 3 Catalyst, its nickel loading is 10wt%, take 0.3g Ni / α-Al 2 o 3 The catalyst was placed in a fixed bed reactor under 50% H 2 / N 2 Reduction treatment at 700°C under atmosphere for 1h, switch to nitrogen atmosphere, the internal temperature of the reactor is stabilized at 700°C, inject water vapor and toluene vapor into the reactor under the nitrogen flow, and the molar ratio of injected water vapor to carbon in toluene is 3:1, that is, the molar ratio of water molecules to toluene molecules is 21:1, the reaction temperature is 700°C, the reaction time is 60min, and the carbon nanotubes in Ni / α-Al 2 o 3 The surface of the catalyst grows, and during the growth process, surface nickel particles migrate to the top and tube wall of the carbon nanotube, and a highly active nickel-ba...
Embodiment 2
[0030] A method for preparing a highly active nickel-based catalyst by utilizing self-grown carbon nanotubes, the specific steps are as follows:
[0031] Preparation of Ni / SiO by impregnation method 2 Catalyst, its nickel loading is 5wt%, take 0.3g Ni / SiO 2 The catalyst was placed in a fixed bed reactor under 50% H 2 / N 2 Reduction treatment at 700°C for 2 hours in the atmosphere, switch to nitrogen atmosphere, the internal temperature of the reactor is stabilized at 700°C, inject water vapor and phenol vapor into the reactor under the nitrogen flow, and the molar ratio of the injected water vapor to the carbon in toluene is 3:1, that is, the molar ratio of water molecules to phenol molecules is 18:1, the reaction temperature is 700°C, and the reaction time is 60min. Carbon nanotubes in Ni / SiO 2 The surface of the catalyst grows, and during the growth process, surface nickel particles migrate to the top and tube wall of the carbon nanotube, and a highly active nickel-based ...
Embodiment 3
[0034] A method for preparing a highly active nickel-based catalyst by utilizing self-grown carbon nanotubes, the specific steps are as follows:
[0035] Preparation of Ni-Fe / SiO by Deposition and Precipitation 2 Catalyst, its nickel loading is 20wt%, take 0.3gNi-Fe / SiO 2 The catalyst was placed in a fixed bed reactor under 50% H 2 / N 2Reduction treatment at 700°C for 2 hours in the atmosphere, switch to nitrogen atmosphere, the internal temperature of the reactor is stabilized at 700°C, inject water vapor and acetylene into the reactor under the nitrogen flow, and the molar ratio of the injected water vapor to the carbon in the acetylene is 3:1, that is, the molar ratio of water molecules to phenol molecules is 6:1, the reaction temperature is 700°C, the reaction time is 60min, carbon nanotubes in Ni-Fe / SiO 2 The surface of the catalyst grows, and during the growth process, surface nickel particles migrate to the top and tube wall of the carbon nanotube, and a highly activ...
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