Dry removal of metal impurities in CNT, graphite, and carbon black using Cl2/HCl.
In the high purification of carbon powder, metal impurities such as Fe, Ni, Al, and Cu can affect conductivity, battery characteristics, catalytic activity, and the quality after graphitization treatment.
Our small chlorine furnace can explore conditions for the dry removal of metal impurities remaining in CNTs, carbon black, synthetic graphite, conductive additives, etc., as volatile chlorides through selective chlorination using Cl2/HCl.
Unlike wet processing, it reduces the need for washing water, waste liquid treatment, and drying processes, making it suitable for carbon materials that dislike moisture and for powder processing where re-agglomeration and re-contamination after drying should be avoided.
Additionally, by considering negative pressure operation and oxygen partial pressure in the furnace configuration, it is possible to explore impurity removal conditions while suppressing the oxidation and wear of the carbon substrate.
【Features】
■ Compatible with selective chlorination using Cl2/HCl
■ Capable of examining the removal of Fe/Ni/Al in CNTs, graphite, and carbon black
■ Reduces waste liquid and drying processes associated with wet processing
■ Suppresses the impact on the carbon substrate through negative pressure operation and oxygen partial pressure management
■ Allows comparison of temperature, gas concentration, and processing time with small sample sizes
*For more details, please download the materials or contact us.
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