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Gas phase permeation precipitation method for preparation of supported nanometer nickel hydrogenation catalyst

A nano-nickel hydrogenation catalyst and gas-phase infiltration technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of low catalytic efficiency, low nickel content of the catalyst, sintering deactivation of nano-crystal grains, etc. Achieve the effects of simple process, easy control of conditions and high production efficiency

Inactive Publication Date: 2006-07-26
BEIJING CISRI GAONA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nickel content of the catalyst prepared by this method is low, correspondingly its catalytic efficiency is low, and high temperature roasting can easily lead to the sintering deactivation of nano-crystals

Method used

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  • Gas phase permeation precipitation method for preparation of supported nanometer nickel hydrogenation catalyst
  • Gas phase permeation precipitation method for preparation of supported nanometer nickel hydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put 5L nickel carbonyl liquid from the storage tank into the evaporator, weigh 800g gamma alumina strip carrier (φ1mm) and put it into the vapor phase infiltration / deposition tower, and then operate according to the above steps 2-6. The operating parameters are: the temperature of the evaporator water bath is 35°C; the volume mixing ratio of nickel carbonyl vapor and carrier gas is 1:6, and the carrier gas is 99.9% nitrogen; during gas phase infiltration, the temperature of the material tower is 40°C, and the time is 0.5 h; during pyrolysis deposition, the temperature of the material tower is 90°C, and the time is 0.5h; after the deposition, the baking temperature is controlled at 330°C, and the time is 1h.

[0026] After the experiment, the nickel content of the catalyst was analyzed to be 5.6 wt%, and the size of the nano-nickel was analyzed by a field emission scanning electron microscope to be 25-45nm.

Embodiment 2-5

[0027] Embodiment 2-5, experiment method is the same as embodiment 1, and experiment parameter is shown in Table 1.

[0028] Table 1

[0029]

Embodiment 6

[0031] Catalyst hydrogenation performance evaluation by continuous micro-reflector-chromatography system. The hydrogenated oil sample is a mixture of decahydronaphthalene (60%) and toluene (40%), and the catalyst consumption is 0.1 g. The catalyst was reduced at 200°C for 3h before hydrogenation. The hydrogenation reaction was carried out under normal pressure, the hydrogen flow rate was 180ml / min, the hydrogen-to-oil ratio was 1800:1, the hydrogenation temperature was 130°C, and the chromatographic sampling and analysis were carried out after 3 hours of passing the oil sample. The hydrogenation evaluation results of the catalysts of Examples 1-5 are shown in Table 2.

[0032] Toluene conversion % = (toluene content in oil sample before hydrogenation - toluene content in oil sample after hydrogenation) / toluene content in oil sample before hydrogenation × 100%

[0033] Table 2

[0034]

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Abstract

The invention, belonging to hydrogenation catalyst, relates the method for preparation of loaded nanometer nickel catalyst. The method comprises the following steps: loading the nickel carbonoxide compound into feed tower with carrier gas, nickel carbonoxide penetrating and adsorbing on the carrier, then heating, nickel carbonoxide pyrolyzing and depositing on the carrier, finally calcining the carrier and getting the loaded nanometer nickel catalyst. The method has the advantages of simple technique, easy control, high productivity, low cost, non-pollution and wide applications.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysts, in particular to a method for preparing a nano-nickel catalyst, in particular to a method for preparing a supported nano-nickel catalyst by a metal-organic chemical vapor phase infiltration deposition method. Background technique [0002] In the prior art, nano-catalysts have a thin uniform surface layer and a special crystal structure, and their unique electronic structure and excellent surface properties are conducive to the adsorption of reactants and the progress of surface chemical reactions, so nano-catalysts exhibit specific gravity Lightweight, large specific surface area, high reactivity, strong selectivity, long service life, good operating performance and other outstanding advantages, especially for catalytic oxidation, reduction and cracking reactions with high activity and selectivity. [0003] At present, the preparation methods of supported nano-nickel catalysts use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/02B01J23/755B01J32/00B01J35/02B01J35/00
Inventor 李一韩伟柳学全霍静任卫黄乃红糜家铃李红云李荣岩滕荣厚
Owner BEIJING CISRI GAONA TECH
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