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A heteroatom-containing carbon material, its preparation method and application, and a method for oxidative dehydrogenation of hydrocarbons

A carbon material and heteroatom technology, applied in the field of heteroatom-containing carbon materials and their preparation, can solve the problems of low product selectivity and the like

Active Publication Date: 2021-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to overcome the technical problem of low product selectivity of the existing carbon materials when used as catalysts for the oxidative dehydrogenation of hydrocarbons, and provide a heteroatom-containing carbon material, which can be used in the oxidative dehydrogenation of hydrocarbons Remarkably improved product selectivity was shown in the reaction

Method used

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  • A heteroatom-containing carbon material, its preparation method and application, and a method for oxidative dehydrogenation of hydrocarbons
  • A heteroatom-containing carbon material, its preparation method and application, and a method for oxidative dehydrogenation of hydrocarbons
  • A heteroatom-containing carbon material, its preparation method and application, and a method for oxidative dehydrogenation of hydrocarbons

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preparation example Construction

[0034] According to the second aspect of the present invention, the present invention provides a method for preparing a heteroatom-containing carbon material, the method comprising: calcining the raw carbon material at a temperature of 400-1200°C in a reactive atmosphere .

[0035] According to the method described in the second aspect of the present invention, the raw carbon material contains oxygen element, hydrogen element and carbon element, based on the total amount of the raw carbon material and in terms of elements, the content of the oxygen element is 0.2-12% by weight, the content of the hydrogen element is 0.05-3% by weight, and the content of the carbon element is 85-99.75% by weight. From the perspective of further improving the product selectivity of the final prepared heteroatom-containing carbon material as a catalyst for the oxidative dehydrogenation of hydrocarbons, the content of the oxygen element is based on the total amount of the raw carbon material and c...

Embodiment 1

[0070] Activated carbon (purchased from Green World Activated Carbon Co., Ltd., with a volume average particle size of 200 μm) as a raw carbon material, and its property parameters are listed in Table 1. In the X-ray diffraction spectrum of the raw carbon material, at a 2θ angle of 20 °-30° and between 40°-50°, there are diffuse peaks respectively, and there are no diffraction peaks and sharp peaks in the rest of the position) placed in a tube furnace and roasted at 500°C for 5h, during the roasting process continued to the tube Pass into the reactive atmosphere (wherein, the content of ammonia gas is 3 volume %, the content of steam is 2 volume %) that is made up of ammonia, water vapor and nitrogen in the furnace, after roasting finishes, keep above-mentioned reactive atmosphere, will The temperature of the tube furnace was naturally cooled to room temperature to obtain the heteroatom-containing carbon material (volume average particle size of 205 μm) according to the present...

Embodiment 2

[0072] Adopt the same method as Example 1 to prepare heteroatom-containing carbon materials, the difference is that the temperature of calcination is 700 ° C, so as to obtain heteroatom-containing carbon materials according to the present invention (volume average particle size is 210 μm), and its property parameters are in As listed in Table 1, in the X-ray diffraction spectrum of the heteroatom-containing carbon material, there are diffuse peaks at 2θ angles of 20°-30° and 40°-50°.

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Abstract

The invention discloses a heteroatom-containing carbon material, its preparation method and application, and a hydrocarbon oxidative dehydrogenation method. The heteroatom-containing carbon material contains oxygen, nitrogen, hydrogen and carbon elements. The heteroatom-containing carbon material has X In the ray diffraction pattern, there are diffuse peaks between 20°-30° and 40°-50° at the 2θ angle, and the surface oxygen content determined by X-ray photoelectron spectroscopy is a, determined by elemental analysis The content of bulk oxygen is b, a / b≥2. As a catalyst for the oxidative dehydrogenation reaction of hydrocarbons, the heteroatom-containing carbon material can obtain significantly improved olefin selectivity, reduce the amount of raw materials for ineffective combustion, and improve raw material utilization and reaction safety. Also, the heteroatom-containing carbon material according to the present invention is low in cost and easy to obtain.

Description

technical field [0001] The invention relates to a heteroatom-containing carbon material and its preparation method and application. The invention also relates to a hydrocarbon oxidation dehydrogenation method using the heteroatom-containing carbon material as a catalyst. 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. [0003] Currently, various types of carbon materials have been reported for catalytic reactions such as alkane activation and oxidative dehydrogenation. For example, in the 1960s an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08C07C5/48C07C11/08C07C11/02
CPCB01J27/24B01J37/08C07C5/48C07C11/08C07C11/02
Inventor 谢婧新荣峻峰于鹏林伟国宗明生
Owner CHINA PETROLEUM & CHEM CORP
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