Preparation method and application of carbon nanofiber-bimetal composite catalyst

A composite catalyst, nano carbon fiber technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. problems, to achieve the effect of reducing the preparation cost, improving the conversion rate and high pore structure

Active Publication Date: 2017-02-15
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0005] Technical problem: the purpose of the invention is in order to solve existing catalyst in CH 4 / CO 2 It is easy to sinter during the reforming process, the service life is low, and the carrier pores are easily blocked during the preparation process of the impregnation method. A preparation method for nano-carbon fiber / bimetallic composite catalyst is provided, and nano-fibers containing alkaline earth metals are prepared by electrospinning Raw silk, the raw silk is mixed with nitric acid and transition metal salt for impregnation, washed to neutral, and dried

Method used

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  • Preparation method and application of carbon nanofiber-bimetal composite catalyst

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Embodiment example 1

[0026] (1) First weigh a certain amount of magnesium sulfate and dissolve it in the acetic acid solution, then weigh 3~5g lignin and mix, heat and stir the above mixed solution, set the end temperature to 60~80℃, and add it with a needle during the stirring process 3 to 5 mL of 10wt% polyvinyl alcohol solution. After continuing to stir for a period of time, turn off the heating device, naturally cool down to room temperature and transfer to the syringe;

[0027] (2) Spinning the above-mentioned spinning solution on an electrostatic spinning machine, and then combine the nanofibers with Ni(NO 3 ) 2 Mix and soak overnight and evaporate to dryness. Then wash until neutral and dry.

[0028] (3) Put the above-obtained dried composite in a horizontal tube furnace, at an air flow rate of 150mL / min, and a heating rate of 0.3~1℃ / min, the temperature will be increased to 200~250℃, and then the temperature will be pre-oxidized for a period of time. , After the temperature drops to room temp...

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Abstract

The invention discloses a preparation method and an application of a carbon nanofiber-bimetal composite catalyst. Specifically, alkaline earth metal salt is mixed in a spinning solution for spinning, proto-filaments are mixed with nitric acid, and transition metal salt is impregnated. Obtained bimetal composite proto-fibers are subjected to peroxidation and carbonization, and the carbon nanofiber-bimetal composite catalyst is prepared. Active components are fixed under the mutual action of alkaline earth metal and transition metal embedded in the fibers at the high temperature during spinning, high dispersion and high-temperature sintering resistance of active components on the carrier surface are guaranteed, and meanwhile, the conversion rate is ensured to be about 95% at 800 DEG C by using the characteristic that alkaline earth metal adsorbs activated CO2 in the CH4/CO2 reforming process.

Description

Technical field [0001] The invention belongs to the field of composite catalyst preparation and gasification reforming, and relates to a preparation method of nano carbon fiber / bimetal composite catalyst and its application in CH 4 / CO 2 Application in the restructuring process. Background technique [0002] With the increasing depletion of oil resources, high oil prices, and increasingly severe environmental pollution, the development and utilization of clean and cheap fuel resources has become an urgent issue. At present, the cleanest fuel is natural gas, which has low pollution (about 1 / 800 of coal and 1 / 40 of oil) and is also an ideal chemical raw material. Methane is the main component of natural gas (90%). Its chemical properties are stable, and it has the advantages of environmental friendliness, low cost, and sufficient resources. Its rational use has attracted wide attention from scientific researchers in various countries. At the same time, the global extreme climate ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J23/34B01J23/08B01J35/06C01B3/40
CPCC01B3/40B01J23/08B01J23/34B01J23/78B01J35/06C01B2203/0238Y02P20/52
Inventor 宋敏卫月星于磊毛瑞鑫刘洋徐玉叶
Owner SOUTHEAST UNIV
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