NOVELTY - Preparation (P1) of a hybrid fuel involves: introducing a first reactant to a reactor, where the first reactant comprises at least one light gas; exposing the first reactant to non-thermal plasma under conditions sufficient to generate syngas and free radicals; introducing a first liquid feed fuel to the reactor; and intimately contacting the syngas and the free radicals generated from the first reactant with the first liquid feed fuel in the reactor to produce a modified liquid fuel.    USE - For the preparation of a hybrid fuel, particularly biofuel; for refining of oil; for reforming light gas selected from methane or natural gas (claimed). Also useful for the production of liquid fuels including mineral-, plant-, and animal-based hydrocarbons.    ADVANTAGE - The processes for making hybrid fuels are flexible, fully integrated, and can be readily adapted to the available feedstocks on-hand as well as adapted to the type of hybrid fuel desired. The hybrid fuels obtained from the process have reduced greenhouse gas emissions, reduced particulate emissions, and have feedstocks comprising materials produced by the consumption of carbon dioxide (e.g. plant oils). The hybrid fuels have high energy content per pound/gallon, are able to withstand multiple freeze cycles, are stable, have favorable viscosity and cetane values (for diesel-type fuel replacements), equivalent phosphorus content, compatible distillation curves, favorable corrosion characteristics, and compatibility with existing seal materials.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a hybrid fuel comprising: a first fuel product; and a second fuel product, where the first fuel product comprises a biofuel emulsion; and the second fuel product comprises a fuel prepared from the light gases combined with a liquid fuel feed, where the hybrid fuel comprises at least 20 wt.% of the first fuel product;    (2) reforming (P2) light gas, involving reforming the light gases in the presence of non-thermal plasma under conditions sufficient to generate the formation of free radicals;    (3) an apparatus for the preparation of the hybrid fuel, comprising: a first inlet for introducing a first reactant, where the first reactant comprises the light gases; electrodes in fluid connection with the inlet, where the electrodes are capable of producing an arc upon application of voltage and the electrodes define a path for passage of the first reactant; a second inlet for introducing a first liquid feed fuel to the apparatus; an exit zone in which the product of the reaction of the first reactant and the electrodes and the first liquid feed fuel comes into contact; and an outlet in fluid connection with the exit zone; and    (4) producing (P3) feedstock involving: supplying carbonaceous feedstock to a hydromethanation reactor; and reacting the carbonaceous feedstock in the presence of a catalyst and steam to produce gases.