Coal heat-treatment process and system
AssigneePneumatic Processing Technologies, LLC
InventorMichael A. Jones
Life of this patent
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Abstract
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.
Claims29
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.
A method for flash-heating production of activated carbon from a particulate lignitic or subbituminous coal suitable for forming same, comprising the steps of:
- a. mixing a particulate lignitic or subbituminous coal feedstock with an activation medium in a mixer such that the water content of said particulate lignitic or subbituminous coal feedstock is equal to or greater than that of said lignitic or subbituminous coal feedstock's naturally occurring state of about 15% to about 37% internal moisture;
- b. pneumatically conveying the particulate lignitic or subbituminous coal feedstock with said water content from the mixer 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.
Dependencies are inferred from the claim text.