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US 12,448,293 B2Granted
Methods for producing graphene from coal
AssigneeCarbon Holdings Intellectual Properties, LLC
InventorsCharles Agee Atkins, Garrett W. Lindemann, Matthew Targett
Life of this patent
Estimating the term…
Abstract
A method of preparing graphene from coal can include thermally processing raw coal and, after the coal has been at least partially cooled from thermal processing, forming reduced graphene oxide from the coal.
Claims13
A method of producing reduced graphene oxide from coal, the method comprising:
- thermally processing coal at a temperature of at least 310° F. and not to exceed 350° F.;
- oxidizing the thermally processed coal to form coal oxide;
- transferring the coal oxide to a mercury removal reactor and heating the coal in the mercury removal reactor to a second temperature of at least 500° F. and not to exceed 700° F.;
- contacting the coal oxide with an inert gas to remove greater than 70% of mercury present in the coal;
- cooling the coal oxide to a third temperature in the mercury removal reactor, the third temperature being below 300° F.;
- and
- forming reduced graphene oxide from the coal oxide, the reduced graphene oxide comprising a predetermined concentration of less than about 15 atomic % of one or more impurity atoms, the one or more impurity atoms comprising cadmium, selenium, or chromium.
4 more elements
A synthetic graphene formed from an amount of coal, the synthetic graphene comprising:
- a predetermined concentration between about 0.1 atomic % and about 2 atomic % of dopant atoms, the dopant atoms comprising cadmium or chromium;
- and
- a carbon nanotube chemically bonded to the synthetic graphene with chemical linkers, and comprising a metal dopant different from the dopant atoms.
A synthetic reduced graphene oxide formed from an amount of coal, the synthetic reduced graphene oxide comprising:
- a predetermined concentration between about 0.1 atomic % and about 2 atomic % of one or more impurity atoms, the one or more impurity atoms comprising cadmium or chromium;
- and
- a carbon nanotube chemically bonded to the synthetic reduced graphene oxide with chemical linkers, and comprising a dopant different from the one or more impurity atoms.
Dependencies are inferred from the claim text.