Method for preparing conductive carbon black and hydrogen by plasma technology

A technology of conductive carbon black and plasma, applied in chemical instruments and methods, hydrogen, chemical/physical/physical-chemical processes of applied energy, etc., can solve problems such as failure, achieve convenient shutdown and load regulation, and be beneficial to the environment Protective, wide-ranging effects

Inactive Publication Date: 2011-06-29
SUZHOU NAKANGNAMI MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Norway's CB&H process uses thermal plasma to prepare conductive carbon black. It has been reported that the annual output can reach 2,000 tons, but the project failed in the end.
Over the years, the French Ecole des Mines de Paris and the IMP laboratory of the French National Center for Scientific Research and the Swiss Timcal company have vigorously developed thermal plasma technology, but they have not been successful.

Method used

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  • Method for preparing conductive carbon black and hydrogen by plasma technology
  • Method for preparing conductive carbon black and hydrogen by plasma technology
  • Method for preparing conductive carbon black and hydrogen by plasma technology

Examples

Experimental program
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Embodiment 1

[0018] Embodiment 1: A method for producing conductive carbon black using methane as a raw material, using hydrogen as a carrier gas, adding methane into the carrier gas, discharging at a voltage of 360V, a current of 20A, and a discharge gap of 2 to 3 mm, using needle tip discharge Mode; the molar ratio of carbon source to hydrogen is 1:5, the residence time of the gas in the plasma generator is 0.01 second and then enters an insulated fluidized bed reactor; the primary plasma generator and fluidized bed reaction are adopted device. Its reaction scheme sees appendix figure 1 shown. In the test, it is measured by using a high-temperature radiometer. Under the above-mentioned working conditions, the temperature in the reactor is about 1200-1600 degrees, and the single-pass conversion rate of methane is about 30%. The SEM and TEM of the prepared product are as attached figure 2 And attached image 3 shown.

Embodiment 2

[0019] Embodiment 2: A method for producing conductive carbon black with propane as a raw material, using hydrogen as a carrier gas, adding propane to the carrier gas to carry out a cracking reaction, the voltage is 560-580V, the current is 25-30A, and the discharge gap is 3-5 mm, using pin-ring discharge mode; the molar ratio of carbon source to hydrogen is 1:5, the residence time of the gas in the plasma generator is 0.01 seconds and then enters an insulated fluidized bed reactor; the primary plasma is used generators and fluidized bed reactors. Its reaction scheme sees appendix figure 1 shown. It is found that there are many carbon nanotubes in the product conductive carbon black, and its HRTEM is as attached Figure 4 shown. The conversion of propane is about 50% per pass.

Embodiment 3

[0020] Embodiment three: a kind of method that is raw material production conductive carbon black and pure hydrogen with methane, use hydrogen as carrier gas, add methane in the carrier gas, the voltage of the first plasma generator is at 5kV, and electric current is at 10A, and discharge gap is 1.5 cm, using the needle ring discharge mode; the molar ratio of carbon source to hydrogen is 1:5, the residence time of the gas in the plasma generator is 0.02 seconds and then enters an insulated fluidized bed reactor; using three-stage plasma Combination of bulk generator and fluidized bed reactor, the voltage of the second plasma generator is 5kV, and the current is 8A; the voltage of the third plasma generator is 5kV, and the current is 5A. The purity of the final hydrogen is about 96%, with the remainder being unconverted methane.

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PUM

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Abstract

The invention discloses a low-cost, high-dispersibility and high-conductivity carbon black and hydrogen preparation method, which is characterized in that: a gas or gasifiable carbon-containing raw material is selected, hydrogen is used as a carrier gas, a gas hydrocarbon compound is added into the carrier gas, a secondary gas hydrocarbon compound is added into a plasma wake flame, and a high-voltage, low-current and long-gap-discharge mode is adopted; the gases in plasma generators have high space velocity and short reaction dwell time; the reactants are filled in a thermal-insulation fluid bed reactor, and the dwell time of carbon black in the thermal-insulation fluid bed reactor is several seconds to several minutes; after the separation of the carbon black from the gas, part of the gas circularly enters the first plasma generator and the first fluid bed reactor, and the rest gas enters a second plasma generator and a second fluid bed reactor; and if to obtain purer hydrogen, a third plasma generator and a third fluid bed reactor can be used to obtain low-cost, high-dispersibility, high-graphitization and high-conductivity conductive carbon black and pure hydrogen.

Description

technical field [0001] The invention relates to a method for preparing conductive carbon black and pure hydrogen with low cost, high dispersibility and high conductivity, in particular to a method for preparing conductive carbon black and pure hydrogen using low-temperature plasma technology and a fluidized bed reactor . Conductive carbon black is used in the preparation of rubber and plastic products, coatings, inks, batteries, electronic devices, etc., and hydrogen is a new type of clean energy. Background technique [0002] A nanometer is one billionth of a meter. When the scale of a material enters the nanoscale, it has many special properties, such as surface effects, volume effects, and quantum effects. Carbon black is one of the few nanomaterials that has been mass-produced very early. It has the characteristics of low price, high chroma, non-toxicity and good chemical stability. 80% of the world's carbon black is consumed in the automobile industry. Today, my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/50C01B3/30B01J19/08
Inventor 洪若瑜王月英朱青翁金凤王若渟
Owner SUZHOU NAKANGNAMI MATERIALS
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