Activated carbon composite and method of removing contaminant
AssigneeBirchtech Corp.
InventorsJohn H. Pavlish, James C. Trettel
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Abstract
A method of forming an activated carbon composite includes optionally performing a pre-treatment of a primary carbonaceous material, adding an additive composition to the primary carbonaceous material to form a composite, optionally performing a post-treatment of the composite, wherein at least one of the pre-treatment and the post-treatment are performed, to form the activated carbon composite. A method of treating water or gas includes contacting contaminated water or gas including one or more contaminants with a carbonaceous material and one or more additives to form treated water or gas having a lower concentration of the one or more contaminants than the contaminated water or gas.
Claims18
A method of forming an activated carbon composite, the method comprising:
- obtaining or providing a primary carbonaceous material comprising used granular activated carbon contaminated with a perfluoroalkyl or polyfluoroalkyl substance (PFAS);
- optionally performing a pre-treatment of the primary carbonaceous material;
- adding an additive composition to the primary carbonaceous material, to form a composite of the primary carbonaceous material and the additive composition, wherein the additive composition comprises activated carbon, alumina, activated alumina, aluminum hydroxide, iron, a binder, or a combination thereof, wherein the additive composition is 0.001 wt % to 90 wt % of the composite of the primary carbonaceous material and the additive composition;
- and
- optionally performing a post-treatment of the composite of the primary carbonaceous material and the additive composition;
- wherein at least one of the pre-treatment and the post-treatment is performed and comprises heating;
- to form the activated carbon composite.
A method of forming an activated carbon composite, the method comprising:
- adding an additive composition comprising powdered activated carbon and a binder to a primary carbonaceous material comprising virgin or used granular activated carbon, to form a composite of the primary carbonaceous material and the additive composition, wherein the additive composition is 0.001 wt % to 90 wt % of the composite of the primary carbonaceous material and the additive composition;
- shaping the composite of the primary carbonaceous material and the additive composition, to form a shaped composite of the primary carbonaceous material and the additive composition;
- and
- performing a post-treatment of the shaped composite of the primary carbonaceous material and the additive composition comprising heating to transform the binder to a char, a pyrolyzed binder, a carbonized binder, or a combination thereof, to form the activated carbon composite.
A method of forming an activated carbon composite, the method comprising:
- performing a pre-treatment of a primary carbonaceous material comprising heating;
- wherein the primary carbonaceous material comprises used activated carbon contaminated with a perfluoroalkyl or polyfluoroalkyl substance (PFAS), and wherein the primary carbonaceous material comprises a granular activated carbon;
- and
- adding an additive composition to the primary carbonaceous material, to form a composite of the primary carbonaceous material and the additive composition, wherein the additive composition comprises activated carbon, alumina, activated alumina, aluminum hydroxide, iron, a binder, or a combination thereof, wherein the additive composition is 0.001 wt % to 90 wt % of the composite of the primary carbonaceous material and the additive composition;
- to form the activated carbon composite.
Dependencies are inferred from the claim text.