Nanometer carbon material containing heteroatoms and preparation method and application thereof, and dehydrogenation reaction method for hydrocarbons

A nano-carbon material and heteroatom technology, applied in nanotechnology, hydrocarbons, hydrocarbons, etc., can solve problems such as lack of consensus, achieve small structural impact, improve raw material conversion rate and product selectivity, and stable performance. Effect

Active Publication Date: 2016-08-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although a lot of progress has been made in the research on the doping modification of carbon nanomaterials and their catalytic properties, there is still no consensus on some of the basic issues. conduct in-depth research

Method used

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  • Nanometer carbon material containing heteroatoms and preparation method and application thereof, and dehydrogenation reaction method for hydrocarbons
  • Nanometer carbon material containing heteroatoms and preparation method and application thereof, and dehydrogenation reaction method for hydrocarbons
  • Nanometer carbon material containing heteroatoms and preparation method and application thereof, and dehydrogenation reaction method for hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] (1) 20g of multi-walled carbon nanotubes (specific surface area is 136m 2 / g, the content of oxygen atom is 0.3% by weight, the content of nitrogen atom is 0.02% by weight, the total content of other non-metallic heteroatoms (phosphorus atom and sulfur atom) except nitrogen atom and oxygen atom is 0.01% by weight, and the total content of metal atom The content is 0.1% by weight, and the weight loss rate in the temperature range of 400-800°C is w 800 , the weight loss rate w in the temperature range of 400-500°C 500 ,w 500 / w 800 0.12, purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) and dispersed in deionized water, wherein the dispersion was carried out under ultrasonic oscillation conditions, and the ultrasonic oscillation conditions included: the frequency was 14kHz, and the time was 0.5 hours. Then, NH was added to the aqueous dispersion 3 and hydrogen peroxide, and stir well to obtain an aqueous dispersion, wherein, NH 3 and hy...

Embodiment 2

[0107] The same method as in Example 1 is used to prepare heteroatom-containing nano-carbon materials. The difference is that in step (1), the ratio of multi-walled carbon nanotubes (purchased from Shandong Dazhan Nano Materials Co., Ltd.) as raw material nano-carbon materials Surface area is 251m 2 / g, the weight loss rate w in the temperature range of 400-800°C 800 , the weight loss rate w in the temperature range of 400-500°C500 ,w 500 / w 800 is 0.33, the content of oxygen atoms is 0.62% by weight, the content of nitrogen atoms is 0.01% by weight, the total content of other non-metallic heteroatoms (phosphorus atoms and sulfur atoms) except nitrogen atoms and oxygen atoms is 0.01% by weight, and the total amount of metal atoms The content is 0.08% by weight. The composition, specific surface area and w of the prepared heteroatom-containing carbon nanomaterials 500 / w 800 Listed in Table 1.

Embodiment 3

[0109] Adopt the same method as Example 1 to prepare heteroatom-containing nano-carbon materials, the difference is that in step (2), the obtained aqueous dispersion is placed in a high-pressure reactor with a polytetrafluoroethylene liner at 80 ° C Under the temperature of , react under autogenous pressure for 24 hours. The composition, specific surface area and w of the prepared heteroatom-containing carbon nanomaterials 500 / w 800 Listed in Table 1.

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Abstract

The invention discloses a nanometer carbon material containing heteroatoms and a preparation method and application thereof. The nanometer carbon material containing heteroatoms comprises, by weight, 4 to 12% of elemental O, 2 to 16% of elemental N and 82 to 94% of elemental C. In a pattern of X-ray photoelectron spectroscopy, a ratio of the amount of elemental O determined by peaks in a range of 531.0 to 532.5 eV to the amount of elemental O determined by peaks in a range of 532.6 to 533.5 eV is 0.1 to 0.5; and a ratio of the amount of elemental N determined by peaks in a range of 398.5 to 400.1 eV to the amount of the total elemental N is 0.8 to 1. The invention also provides a method for a dehydrogenation reaction of hydrocarbons with the nanometer carbon material containing heteroatoms as a catalyst. The nanometer carbon material containing heteroatoms shows good catalytic performance in the dehydrogenation reaction of hydrocarbons and can obviously improve the conversion rate of raw materials and product selectivity.

Description

technical field [0001] The present invention relates to a kind of heteroatom-containing nano-carbon material, and the present invention also relates to a preparation method of a heteroatom-containing nano-carbon material and the heteroatom-containing nano-carbon material prepared by the method. The heteroatom-containing nano-carbon material prepared by roasting the heteroatom-containing nano-carbon material. The present invention further relates to the application of the heteroatom-containing nano-carbon material as a catalyst for hydrocarbon dehydrogenation reaction and a method for hydrocarbon dehydrogenation reaction. Background technique [0002] The dehydrogenation reaction of hydrocarbons is an important type of reaction. For example, most low-carbon alkenes are obtained through the dehydrogenation reaction of low-carbon alkanes. Dehydrogenation reactions can be divided into direct dehydrogenation reactions (ie, no oxygen participation) and oxidative dehydrogenation re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B82Y40/00C07C5/48C07C11/02C07C11/08
CPCB01J27/20B01J27/24B82Y40/00C07C5/48C07C11/08C07C2527/20C07C2527/24C07C11/06C07C15/46C07C11/02C07C11/167Y02P20/52
Inventor 史春风荣峻峰于鹏
Owner CHINA PETROLEUM & CHEM CORP
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