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A compact hydrogen generator is coupled to or integrated with a fuel cell for portable power applications. Hydrogen is produced via thermocatalytic decomposition (cracking, pyrolysis) of hydrocarbon fuels in oxidant-free environment. The apparatus can utilize a variety of hydrocarbon fuels, includin

A compact hydrogen generator is coupled to or integrated with a fuel cell for portable power applications. Hydrogen is produced via thermocatalytic decomposition (cracking, pyrolysis) of hydrocarbon fuels in oxidant-free environment. The apparatus can utilize a variety of hydrocarbon fuels, including natural gas, propane, gasoline, kerosene, diesel fuel, crude oil (including sulfurous fuels). The hydrogen-rich gas produced is free of carbon oxides or other reactive impurities, so it could be directly fed to any type of a fuel cell. The catalysts for hydrogen production in the apparatus are carbon-based or metal-based materials and doped, if necessary, with a sulfur-capturing agent. Additionally disclosed are two novel processes for the production of two types of carbon filaments, and a novel filamentous carbon product. The hydrogen generator can be conveniently integrated with high temperature fuel cells to produce an efficient and self-contained source of electrical power.

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I claim: 1. A method of cleaning-up oil spills on a water surface with carbon particles, comprising the steps of: forming carbon particles in a process consisting of passing electrical current through catalytic material that consists solely of carbon black, heating the catalytic material consisting

I claim: 1. A method of cleaning-up oil spills on a water surface with carbon particles, comprising the steps of: forming carbon particles in a process consisting of passing electrical current through catalytic material that consists solely of carbon black, heating the catalytic material consisting solely of the carbon black from about 850° C. to about 1200° C., and passing a stream of hydrocarbon fuel through the catalytic material consisting solely of carbon black with production of hydrogen-rich gas and a plurality of carbon particles with a filamentary surface deposited on the surface of the catalytic material and recovering the carbon particles having a structure of loose curved elongated worm shaped filaments, with a hollow portion, and each of the filaments having a tubular, longitudinal uniformity, of graphitic structure, each of filaments being approximately one micron in mean diameter; scattering the carbon particles on a water surface having an oil layer; breaking the oil layer into a plurality of oil and carbon isles; and removing the plurality of the oil and carbon isles from the water surface. 2. The method of claim 1, wherein the removing step includes the step of: removing the plurality of oil and carbon isles from the water surface hy brushing with a net. 3. The method of claim 1 further comprising the step of: capturing excess oil by a press separator. 4. A method of cleaning-up oil spills on a water surface with carbon particles, comprising the steps of: forming carbon particles in a process consisting of passing electrical current through catalytic material that consists solely of iron and aluminum oxide (Fe-alumina), heating the catalytic material consisting solely of the Fe-alumina from about 850° C. to about 1200° C., and passing a stream of hydrocarbon fuel through the catalytic material consisting solely of Fe-alumina with production of hydrogen-rich gas and a plurality of carbon particles with filamentary surface deposited on the surface of the catalytic material and recovering the carbon particles having the structure or loose curved elongated worm shaped filaments, with a hollow portion, and each of the filaments having a tubular, longitudinal uniformity, of graphitic structure; scattering the carbon particles on a water surface having an oil layer; breaking the oil layer into a plurality of oil and carbon isles; and allowing the oil and carbon isles to sink and remain under water until oil is consumed microbiologically.