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Carbon-metal composite material and synthesis method thereof

A carbon-based material, metal source technology, applied in the direction of hydrocarbons, hydrocarbons, carbon compound catalysts, etc., can solve the problem that the selectivity and conversion rate are difficult to improve at the same time, and achieve the effect of improving selectivity and conversion rate

Active Publication Date: 2017-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when oxidative dehydrogenation of hydrocarbons is used to prepare olefins, there is a common problem that it is difficult to increase the selectivity and conversion rate at the same time.

Method used

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  • Carbon-metal composite material and synthesis method thereof
  • Carbon-metal composite material and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] At room temperature (25°C), stir and mix the solid carbon source (carbon nanotubes not containing oxygen), the precursor (iron oxalate) and water for 2 hours to obtain a mixed material, wherein the solid carbon source and hydrogen The molar ratio of iron is 1:0.3, and the weight ratio of the solid carbon source to water is 1:20; the mixed material obtained above is placed in a sealed autoclave with a polytetrafluoroethylene liner, and Hydrothermal treatment at 140°C for 24 hours under autogenous pressure, the solid in the hydrothermally treated material was separated by filtration and dried, the drying temperature was 120°C, until the solid obtained by filtration and separation maintained a constant weight (drying time was 6h), The dried material was obtained, and then the obtained dried material was calcined in air at a calcination temperature of 330° C. for 2 h, and then calcined in air at a calcination temperature of 430° C. for 2 h to obtain the carbon-based Materia...

Embodiment 2

[0076] At room temperature (25°C), stir and mix the solid carbon source (carbon nanotubes without oxygen), the precursor (iron acetate) and water for 1 hour to obtain a mixed material, wherein the solid carbon source and iron acetate The molar ratio is 1:0.02, and the weight ratio of the solid carbon source to water is 1:40. The mixed material obtained above is placed in a sealed autoclave with a polytetrafluoroethylene liner, and is heated at 180 ℃ under autogenous pressure for 24 hours, the solid in the material after the hydrothermal treatment is filtered and separated and dried, the drying temperature is 120 ℃, until the solid obtained by filtration and separation basically maintains a constant weight (the drying time is 6 hours), and the obtained The dried material is then calcined in air at a calcination temperature of 300° C. for 2 h, and then calcined in air at a calcination temperature of 400° C. for 2 h to obtain the carbon-based material of this embodiment .

Embodiment 3

[0078] At room temperature (25° C.), the solid carbon source (carbon nanotubes without oxygen), the precursor (zinc naphthenate) and water were stirred and mixed for 3 hours to obtain a mixed material, wherein the solid carbon source and The molar ratio of zinc naphthenate is 1:0.5, and the weight ratio of the solid carbon source to water is 1:8; the mixed material obtained above is placed in a sealed autoclave with a polytetrafluoroethylene liner In the process, hydrothermal treatment was carried out at 110°C for 48h under autogenous pressure, and the solids in the hydrothermally treated material were separated by filtration and dried. The drying temperature was 120°C until the mixed material basically maintained a constant weight (drying time was 6h ) to obtain the dried material, then the obtained dried material was calcined in the air for 2 h at a calcination temperature of 350 ° C, and then calcined in the air for 2 h at a calcination temperature of 450 ° C to obtain the p...

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Abstract

The invention discloses a carbon-metal composite material and a synthesis method thereof. By the total weight of a carbon-based material, the carbon-based material comprises 70-99% by weight of a carbon element, 0.2-20% by weight of an oxygen element and 0.1-15% by weight of a metal element. The invention further provides a method for preparing the carbon-metal composite material. The method comprises the following steps: (1) mixing a solid carbon source, a precursor and water so as to obtain mixed materials, wherein the precursor comprises metal sources; (2) performing hydrothermal treatment on the mixed materials obtained in the step (1) so as to obtain a material after hydrothermal treatment, and performing solid separation and drying on the material after hydrothermal treatment so as to obtain a dried material; (3) roasting the dried material obtained in the step (2). The invention further provides application of the carbon-metal composite material to catalyzing hydrocarbonoxidizing. By adopting the carbon-metal composite material, the selectivity and the conversion rate of hydrocarbonoxidizing in preparation of olefin can be simultaneously increased.

Description

technical field [0001] The present invention relates to the field of material chemistry, in particular to a carbon-based material, a method for preparing the carbon-based material and the use of the carbon-based material. Background technique [0002] Carbon-based materials include carbon nanotubes, graphene, fullerenes, carbon nanofibers, and nanodiamonds, among others. Carbon-based materials can be used as catalytic materials for oxidizing hydrocarbons, especially alkanes. For example, there are documents (Applied Catalysis, 29 (1987) 311-326) that use activated carbon as a catalyst to oxidatively dehydrogenate ethylbenzene into styrene, and there are documents (ACTA PHYSICA POLONIC A, 118 (2010) 459-464) reported the use of activated carbon as a catalyst to convert n-butane into butene and butadiene. [0003] Studies have shown that if the saturated and unsaturated functional groups containing heteroatoms such as oxygen and nitrogen are modified on the surface of carbon ...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/06B01J23/04B01J21/18B01J23/75B01J23/755B01J23/72C07C5/48C07C11/167
CPCB01J21/18B01J23/04B01J23/06B01J23/72B01J23/745B01J23/75B01J23/755C07C5/48C07C2521/18C07C2523/04C07C2523/06C07C2523/72C07C2523/745C07C2523/75C07C2523/755C07C11/167
Inventor 史春风荣峻峰于鹏谢婧新宗明生林伟国
Owner CHINA PETROLEUM & CHEM CORP
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