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AssigneeCabot Corporation
InventorsDavid M. Matheu, Frederick H. Rumpf, Theis F. Clarke
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Methods to form carbon coated particles are described. Methods to form coated particles involve subjecting the particles to an energy source that is at least one of hot gas, microwave energy, induction energy, direct current passing through the particles, electromagnetic radiation, or solar radiation, so as to form heated particles, and feeding a hydrocarbon source that is in the form of a gas or vapor into the chamber, such that the hydrocarbon source pyrolyzes, in at least in part, in the chamber to form carbon deposits, and thereby coating the heated base particles with the carbon deposits and form the carbon coated particles. Coated particles produced by one of the methods of the present invention is further described. The advantages achieved with the methods are further described.
A method to form carbon coated base particles, said method comprising introducing base particles into a chamber and subjecting the base particles to an energy source that is at least one of hot gas, microwave energy, induction energy, direct current passing through said base particles, electromagnetic radiation, or solar radiation, so as to form heated base particles, and feeding a hydrocarbon source that comprises a gas or vapor into said chamber, wherein the hydrocarbon source pyrolyzes, in at least in part, in said chamber to form carbon deposits, and thereby coating said heated base particles with said carbon deposits and form said carbon coated base particles, wherein the base particles optionally comprise reclaimed carbon particles.
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A method to form carbon coated precipitated silica particles, said method comprising:
A method of producing hydrogen, comprising performing the method of any of the preceding claims, wherein pyrolysis of the hydrocarbon source results in the production of a gas stream comprising hydrogen.
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Carbon coated particles each comprising a base particle and carbon deposits disposed about the external surface of the base particle, the carbon coated particles having a ratio of the areas of the Raman D band (1340 cm−1) and the Raman G band (1590 cm−1) of 0.5 to 2.45, for example, from 1 to 2.45 or from 1.5 to 2.45.
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Dependencies are inferred from the claim text.