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US 9,121,606 B2Granted
Method of manufacturing carbon-rich product and co-products
OwnerSrivats Srinivasacharinventor
Life of this patent
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Abstract
A method in which a parent hydrocarbon-rich material is processed so as to produce both a carbon-rich solid material that has a higher carbon to hydrogen ratio than that of the parent material and a carbon-deficient combustible gas that has a lower carbon to hydrogen ratio than the parent material. In the process, the material is activated by exposing it to a hot gas stream having elevated levels of one or both of carbon dioxide and water vapor. The combustible gas is combusted to produce heat. At least about 80% of the heat is used in one or more endothermic steps that include drying coal or biomass.
Claims9
A method comprising:
- a) providing a parent hydrocarbon-rich solid material;
- b) activating the parent material by exposing it to a hot gas stream at atmospheric pressure, the gas stream resulting from partial oxidation of the parent material using air along with additional carbon dioxide and/or steam, to produce activated carbon with a surface area of at least about 200 m2/gm, and a hydrogen-rich carbon-deficient combustible gas that has a lower carbon to hydrogen ratio than the parent material;
- c) adding supplemental fuel to the combustible gas and then combusting at least some of the combustible gas to produce heat;
- and
- d) using at least about 70% of the energy content of the combustible gas to dry additional coal or biomass other than that used in step a).
2 more elements
Dependencies are inferred from the claim text.