NOVELTY - An alcohol reformer comprises: a conduit including a wall having an exterior surface and an interior surface at least partially defining an interior chamber through which alcohol vapor flows along an alcohol flow path; a set of fins extending generally radially outward from the exterior surface of the conduit wall; a catalyst stage in the interior chamber of the conduit, where the catalyst stage is configured to allow alcohol vapor to flow through the catalyst stage along the alcohol flow path.    USE - The alcohol reformer is useful for reforming alcohol to a mixture of gas including hydrogen (claimed).    ADVANTAGE - The alcohol reformer is highly improved and reliable.    DETAILED DESCRIPTION - An alcohol reformer comprises: a conduit including a wall having an exterior surface and an interior surface at least partially defining an interior chamber through which alcohol vapor flows along an alcohol flow path, the conduit wall comprising a thermally conductive material; a set of fins extending generally radially outward from the exterior surface of the conduit wall, the fins comprising thermally conductive material, where the fins and the conduit wall are in thermal contact; a catalyst stage in the interior chamber of the conduit, where the catalyst stage is configured to allow alcohol vapor to flow through the catalyst stage along the alcohol flow path, the catalyst stage including an alcohol reforming catalyst, and a heat transfer member comprising thermally conductive material, where the heat transfer member is in thermal contact with the conduit wall and the alcohol reforming catalyst, where heat is transferable from the set of fins to the alcohol reforming catalyst to enable reforming of the alcohol vapor as it flows through the catalyst stage. INDEPENDENT CLAIMS are included for:    (1) an alcohol reforming system comprising: an outer reformer housing defining a generally horizontal exhaust channel through which exhaust gas flows along an exhaust gas path; and an alcohol reformer received in the exhaust channel, the reformer including: a conduit including a wall having an exterior surface and an interior surface at least partially defining an interior chamber through which alcohol vapor flows along an alcohol flow path, where the conduit wall comprising a thermally conductive material, the interior chamber being free from fluid communication with the exhaust channel; a set of fins extending generally radially outward from the exterior surface of the conduit wall and located within the exhaust channel, the fins comprising thermally conductive material, where the fins and the conduit wall are in thermal contact; and a catalyst stage in the interior chamber of the conduit, where the catalyst stage is configured to allow alcohol vapor to flow through the catalyst stage along the alcohol flow path, the catalyst stage including an alcohol reforming catalyst, and a heat transfer member comprising thermally conductive material, where the heat transfer member is in thermal contact with the conduit wall and the alcohol reforming catalyst, where heat from the exhaust gas flowing in the exhaust chamber is transferable from the set of fins to the alcohol reforming catalyst to enable reforming of the alcohol vapor as it flows through the catalyst stage; and    (2) a method of reforming an alcohol comprising: introducing an alcohol into a conduit of an alcohol reformer so that the alcohol flows through a catalyst stage within the conduit, the catalyst stage including an alcohol reforming catalyst, and a heat transfer member comprising thermally conductive material, where the heat transfer member is in thermal contact with the conduit and the alcohol reforming catalyst; and delivering, simultaneously with the introducing an alcohol, exhaust gas from an internal combustion engine into an exhaust channel, where the exhaust gas in the exhaust channel contacts fins extending outward from the conduit so that heat from the exhaust gas is transferred through the fins, the conduit, and the heat transfer member to the alcohol reforming catalyst.