The paper discusses the use of nonequilibrium plasma of pulsed high-voltage nanosecond discharge for enhancement of the reforming process in a partial oxidation reactor of a catalyst-free liquid fuel reformer with 30 kW of full burning power. Electrical discharge in the form of repetitive nanosecond sparks develops in the nozzle of a plasmatron serving as the inlet for the premixed reagents. The results demonstrate that the discharge is required for transient modes, including cold start-up and

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... elf-cleaning phase. During normal operation with rich mixture it initiates the first, oxygen-fuel stage of the conversion process. The second stage of the fuel conversion via partial oxidation is the high-temperature reaction of water vapour with hydrocarbons, when plasma-assisted oxidation is inefficient due to non-chain mechanism of the process. High hydrogen yield is achieved by optimal burner and reaction chamber geometry and by efficient heat management. The current prototype yields syngas with up to 20% of H2 and 22% of CO working on gasoline and diesel fuel. Such hydrogen production corresponds to 80% of the theoretical maximum.