Process for the manufacture of activated carbon from coal by mild gasification and hydrogenation
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United States of America Patent
Stats
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Feb 16, 1993
Grant Date -
N/A
app pub date -
Aug 24, 1990
filing date -
Aug 24, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is provided for forming activated carbon from coal in the particulate state. The coal is first dried at a temperature sufficiently high to effect removal of moisture therefrom but below the temperature at which contained volatile matter vaporizes. The dried coal is then heated to an elevated temperature in a substantially non-oxidizing atmosphere at substantially atmospheric pressure sufficient to volatilize and remove the contained volatile matter and produce a char thereof and the char thereafter subjected to hydrogenation at an elevated temperature and pressure for a time sufficient to form activated carbon characterized by a BET surface area of at least about 200 m.sup.2 /g and an iodine number of at least about 400.
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