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Heteroatom-containing carbon nanomaterial as well as preparation method and application thereof, and hydrocarbon dehydrogenation reaction method

A nano-carbon material and heteroatom technology, which is applied in the field of hydrocarbon dehydrogenation reaction, can solve the problem of insufficient catalytic activity, and achieve the effects of good catalytic activity, good stability and little structural influence.

Active Publication Date: 2017-08-04
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the technical problem that the catalytic activity of existing nano-carbon materials is still not high enough when they are used as catalysts for the oxidative dehydrogenation of hydrocarbons, and to provide a heteroatom-containing nano-carbon material, which contains heteroatom-containing nano-carbon materials When used as a catalyst for the oxidative dehydrogenation of hydrocarbons, it can not only obtain high catalytic stability, but also significantly improve the catalytic activity

Method used

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  • Heteroatom-containing carbon nanomaterial as well as preparation method and application thereof, and hydrocarbon dehydrogenation reaction method
  • Heteroatom-containing carbon nanomaterial as well as preparation method and application thereof, and hydrocarbon dehydrogenation reaction method
  • Heteroatom-containing carbon nanomaterial as well as preparation method and application thereof, and hydrocarbon dehydrogenation reaction method

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preparation example Construction

[0049] According to a second aspect of the present invention, the present invention provides a method for preparing a heteroatom-containing nano-carbon material, the method comprising:

[0050] Step A1, contacting the raw carbon nanomaterial with at least one oxidizing agent to obtain an oxidized carbon nanomaterial;

[0051] Step B1, contacting the oxidized nano-carbon material with at least one reducing agent under reducing reaction conditions.

[0052] According to the method of the present invention, the raw material nano carbon material contains oxygen element, hydrogen element and carbon element, based on the total amount of the raw material nano carbon material, in terms of elements, the content of the oxygen element is 0.1-1 weight %, preferably 0.5-0.9% by weight; the content of the hydrogen element is 0.1-1% by weight, preferably 0.3-0.6% by weight; the content of the carbon element is 98-99.8% by weight, preferably 98.5-99.2% by weight %. The content of each eleme...

Embodiment 1

[0117] (1) 5g of multi-walled carbon nanotubes (diameter range of 1-8nm, specific surface area of ​​273m2) as raw material nano-carbon material 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°C 500 ,w 500 / w 800 0.13, the peroxy group content is 0mol / g, purchased from Chengdu Organic Chemistry Co., Ltd., Chinese Academy of Sciences) and 250mL acid solution (H 2 SO 4 The concentration is 1380g / L, HNO 3 The concentration of the acid solution is 227.5g / L, the solvent of the acid solution is water), and the obtained dispersion is placed in an ultrasonic cleaner for ultrasonic treatment, wherein the temperature of the dispersion in the ultrasonic cleaner is controlled to be 50°C, and the ultrasonic treatment The duration is 6 hours and the frequency of the ultrasound is 45kHz. After the ultrasonic treatment is completed, the dispersion liquid is filtered, and the collected solid matter is wash...

Embodiment 2

[0120] Adopt the same method as Example 1 to prepare heteroatom-containing nano-carbon materials, the difference is that in step (2), 2g of oxidized nano-carbon materials are dissolved in 40mL tetrahydrofuran solution of lithium aluminum hydride (lithium aluminum hydride) The concentration is 0.05 mol / L, and the molar ratio of lithium tetrahydrogen to the content of oxygen in the oxidized nano-carbon material is 0.1:1), and reflux at a temperature of 70° C. for 12 hours. The composition and property parameters of the prepared heteroatom-containing carbon nanomaterials are listed in Table 1.

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Abstract

The invention discloses a heteroatom-containing carbon nanomaterial as well as a preparation method and application thereof, and a hydrocarbon dehydrogenation reaction method. The heteroatom-containing carbon nanomaterial contains oxygen, hydrogen and carbon; the concentration of a peroxide group in the heteroatom-containing carbon nanomaterial is 0.1*10<-6>mol / g to 3*10<-6>mol / g. The heteroatom-containing carbon nanomaterial shows good catalytic activity in an oxidative dehydrogenation reaction of hydrocarbons, still maintains the good characteristics of carbon nanomaterials, and has better stability. The preparation method of the heteroatom-containing carbon nanomaterial can stably regulate and control the content and existence form of heteroatoms in the carbon nanomaterial, and has little influence on the structure of the carbon nanomaterial.

Description

technical field [0001] The invention relates to a heteroatom-containing nano-carbon material and its preparation method and application, and also relates to a hydrocarbon dehydrogenation reaction method. Background technique [0002] Carbon materials exist in various morphological structures, including carbon nanotubes, graphite, graphene, nanodiamonds, activated carbon, onion carbon, etc. Compared with traditional metal oxide catalysts, carbon materials have the advantages of being environmentally friendly, renewable, and low energy consumption. Carbon materials also have good thermal conductivity, so the energy utilization rate is high, which is conducive to reducing the reaction temperature and improving product selectivity. At present, various types of carbon materials have been reported to be used in catalytic reactions such as alkane activation and oxidative dehydrogenation. For example, in the 1960s and 1970s, researchers found that coke can catalyze the oxidative deh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B82Y30/00C07C5/48C07C11/08C07C11/167
CPCB82Y30/00C07C5/48B01J21/18B01J21/185C07C2521/18B01J35/613B01J35/615C07C11/08C07C11/167
Inventor 李嘉权荣峻峰于鹏谢婧新史春风
Owner CHINA PETROLEUM & CHEM CORP