NOVELTY - The chemical reactor comprises a flow channel configured to house catalytic reaction converting a portion of a first nanofluid entering the channel into a second nanofluid exiting the channel, a source that is present in fluid communication with an entrance of the flow channel and is configured to contain a first chemical reactant serving as a first base fluid for the first nanofluid, and a destination in fluid communication with an exit of the flow channel receiving a second chemical reaction product serving as a base fluid for the second nanofluid.    USE - The chemical reactor is useful in a fuel system (claimed), which is useful for powering fuel cell vehicles, automotive vehicles, motorized land, sea or aerial travelling vehicles and aerospace vehicles such as hypersonic or near-earth aerospace vehicles.    ADVANTAGE - The chemical reactor enhances operational efficiency of the fuel system.    DETAILED DESCRIPTION - The chemical reactor comprises a flow channel configured to house catalytic reaction converting a portion of a first nanofluid entering the channel into a second nanofluid exiting the channel, a source that is present in fluid communication with an entrance of the flow channel and is configured to contain a first chemical reactant serving as a first base fluid for the first nanofluid, and a destination in fluid communication with an exit of the flow channel receiving a second chemical reaction product serving as a base fluid for the second nanofluid. The flow channel includes a compressible tabulating flow channel element disposed axially along a portion of the flow channel. Catalytic nanoparticles are dispersed in the first nanofluid and are configured to catalytically react the first chemical reactant into the second chemical reaction product in the flow channel. The tabulating flow channel element: is resiliently secured in the flow channel; includes thermally conductive tabulator elements that are secured to one another and non-uniformly distributed around a central axis of the flow channel; and is a flexible screw auger. An outer surface of the tabulating flow channel element includes a porous, chemically inert and thermally conductive coating. INDEPENDENT CLAIMS are included for:    (1) a fuel system; and    (2) a method of providing vehicle fuel to a motive engine.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a fuel system.    First fuel source (12')    Fuel transport channel (14')    Transport channel element (16')    Second fuel destination (18')    First fuel nanofluid. (20A')