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Method for continuously preparing carbon material

A carbon material and carbon source technology, applied in chemical instruments and methods, nano-carbon, carbon compounds, etc., can solve the problems of extremely strict control of process conditions and various influencing factors, and achieve simple and easy preparation process and meet environmental protection requirements , high catalytic efficiency

Active Publication Date: 2014-06-18
SUZHOU FIRST ELEMENT NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]Currently, chemical vapor deposition is a common method for preparing carbon fibers or carbon nanotubes, but this method requires extremely strict control of process conditions, and there are many influencing factors

Method used

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  • Method for continuously preparing carbon material
  • Method for continuously preparing carbon material
  • Method for continuously preparing carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepare small balls of Fe, Co, Ni, W, Mg alloys, take small and large alloy balls with diameters of 7mm and 35mm respectively according to the mass ratio of 1:4 and put them into the rotary furnace, start the rotary furnace, and feed hydrogen and nitrogen mixed gas at the same time Make the partial pressure of oxygen in the furnace cavity less than 500ppm, and when the temperature of the furnace cavity reaches 650°C, acetylene gas is introduced to react, and the flow rates of the mixed gas and acetylene gas are respectively 7 sccm and 1 sccm to obtain the carbon fiber.

[0027] Carbon fiber is analyzed by scanning electron microscope, and SEM pictures are obtained, such as figure 1 As shown, the diameter uniformity of carbon fibers is good. The carbon fiber is analyzed by an X-ray diffractometer, and an X-ray diffraction pattern is obtained, such as figure 2 As shown, the (002) peak of carbon and the peak of catalyst appear. The purified carbon fiber was analyz...

Embodiment 2

[0029] To prepare small balls of Fe, Co, Ni, and W alloys, take small and large alloy balls with diameters of 10mm and 35mm respectively according to the mass ratio of 1:5 and put them into the rotary furnace, start the rotary furnace, and simultaneously feed hydrogen and nitrogen mixed gas to make the furnace The partial pressure of oxygen in the cavity is less than 500ppm. When the temperature of the furnace cavity reaches 700°C, acetylene gas is introduced to react. The flow rates of the mixed gas and acetylene gas are 7sccm and 1sccm, respectively, to obtain the carbon fiber.

[0030] The carbon fiber was analyzed by a scanning electron microscope, and the SEM photo obtained showed that the diameter of the carbon fiber was uniform. The degree of graphitization of the purified sample was 96.3%, and the water absorption rate was 0.085%.

[0031] Figure 5 Shown the present invention adopts the synthesizing method schematic diagram of rotary kiln, and wherein 1 is grat...

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Abstract

The invention provides a method for continuously preparing a carbon material which is a carbon nanofiber or a carbon nanotube. The preparation method comprises the steps of (1) preparing a solid catalyst, namely melting required metals in a ratio, and then casting to form spheres or cylinders, wherein the solid catalyst comprises an alloy with a composition general formula of aM1bM2cM3dM4eM5, and in the general formula, M1, M2, M3, M4 and M5 are selected from Fe, Co, Ni, W, Mo and Mg, and a, b, c, d and e are respectively more than or equal to 0 and less than or equal to 1; (2) adding the solid catalyst into a rotary furnace, and introducing a protective gas into the furnace; (3) heating the rotary furnace to a certain temperature, and then introducing a carbon source into the rotary furnace for reaction; and (4) collecting the obtained nano carbon material. The production method provided by the invention can be used for continuously producing the carbon nano material through the simple devices and steps.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a method for preparing carbon nanofibers or carbon nanotubes. Background technique [0002] As one of the most common elements in nature, carbon constitutes a huge carbon family with its unique bonding orbitals. The graphite structure is that the carbon atoms are regularly arranged in the form of a layered hexagonal grid. In the layer, the carbon atoms are covalently connected to the surrounding three carbon atoms. The distance between the carbon atoms is 0.142nm, and the bond strength between the layers is 627kJ / mol. . The Young's modulus of carbon in the form of graphite is 1000GPa along the direction of the hexagonal layer plane. Therefore, graphite with a layered hexagonal structure grows along the axis parallel to the basal plane, and carbon fibers with excellent properties can be obtained; single-layer or multi-layer Carbon nanotubes with low density, high therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y40/00C01B32/15C01B32/162
Inventor 赵海静李峰李红董明
Owner SUZHOU FIRST ELEMENT NANO TECH