Coal heat-treatment process and system

摘要

Methods and systems for producing activated carbon from a particulate coal feedstock that include the introduction of an activation medium such that the water content of the coal feedstock is equal to or greater than that of the feedstock's naturally occurring state. Different methods and system configurations allow the production of activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions.

主权项

1. A method for flash-activation of a particulate lignitic or subbituminous coal suitable for forming activated carbon, comprising the steps of:
a. loading a particulate lignitic or subbituminous coal feedstock with an activation medium such that the water content of said particulate lignitic or subbituminous coal feedstock is equal to or greater than that of said coal feedstock's naturally occurring state of about 15% to about 37% internal moisture; b. conveying the particulate lignitic or subbituminous coal feedstock of step (a) into a heat treatment system; and c. flash heat treating said particulate lignitic or subbituminous coal feedstock of step (b) such that at least partial activation occurs.