Activated carbon for odor control and method for making same
AssigneeUSFilter Corporation
InventorsJames Richard Graham, Cheng Jian Yuan
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Abstract
An activated carbon-metal oxide matrix is disclosed. The activated carbon-metal oxide matrix may by obtained by a method including the steps of: preoxidizing a carbon material, grinding the preoxidized carbon material; mixing the ground preoxidized material with a metal oxide to form a carbon mixture; extruding the carbon mixture; carbonizing and activating the extrudate. The activated carbon-metal oxide matrix may be used to remove odorous compounds, acidic gases, and volatile organic compounds from a gas.
Claims33
A process for preparing a media for filtering gaseous substances, comprising:
- preoxidizing a carbon material to form preoxidized carbon;
- grinding the preoxidized carbon;
- combining the ground preoxidized carbon and a metal oxide to form a carbon mixture;
- extruding the carbon mixture to form an extrudate;
- carbonizing the extrudate to form a porous carbonaceous mixture;
- and
- activating the porous carbonaceous mixture.
A method of forming an activated carbon-metal oxide matrix comprising:
- preoxidizing a carbon material to form a preoxidized carbon;
- grinding the preoxidized carbon to form ground carbon;
- combining the ground carbon, the metal oxide and coal tar pitch to form a paste;
- extruding the paste to form an extrudate;
- carbonizing the extrudate to form a carbonaceous mixture;
- and
- activating the carbonaceous mixture with steam.
Dependencies are inferred from the claim text.