NOVELTY - A liquid bio-fuel (F1) comprises 50-95 wt.% oxygenated hydrocarbons; 5-50 wt.% nonoxygenated hydrocarbons; not greater than 15 wt.% water; and not greater than 2500 parts per million by weight (ppmw) solids, where the liquid bio-fuel has an ignition temperature of 175-300 degrees C and a higher heating value of at least 9000 btu/lb.    USE - In liquid bio-fuel composition for operating a fuel-powered device (claimed); used as a fuel for clean, controlled combustion in boilers; and used in diesel and stationary turbines.    ADVANTAGE - The liquid bio-fuel has improved stability, less corrosiveness, and/or an improved heating value; has an ignition temperature of 175-300 degrees C, a higher heating value of at least 9000 btu/lb, preferably greater than 10000 btu/lb, a stability parameter of less than 30 cp/h, preferably not greater than 20 cp/h or less than 20 cp/h, an oxygen content of not greater than 20 wt.%, preferably 7-15 wt.%, a total acid number of not greater than 90 mg KOH/g, a hard solids content of not greater than 1000 ppmw, and a viscosity at 40 degrees C of not greater than 125 cps; has an aromatic content of at least 40 wt.% based on the total weight of the nonoxygenated hydrocarbons and a phenolic content of not greater than 80 wt.% based on the total weight of the oxygenated hydrocarbons; has a 10% boiling point of 160-420 degrees C, a 50% boiling point of 340-520 degrees C, and a 90% boiling point of 620-940 degrees C; has a specific gravity of 0.75-1.1, a flashpoint of 40-120 degrees C, a calcium content of not greater than 5000 ppmw, a potassium content of not greater than 5000 ppmw, and a sodium content of not greater than 1000. The nonoxygenated hydrocarbons have an aromatic content of not greater than 60 wt.%, where the oxygenated hydrocarbons have a phenolic content of not greater than 80 wt.% based on the total weight of the oxygenated hydrocarbons.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a liquid bio-fuel composition (F2) comprising oxygenated hydrocarbons in an amount such that the bio-fuel has an oxygen content of less than 30 wt.%, and nonoxygenated hydrocarbons having an aromatic content greater than 40 wt.%, where the high heating value of the bio-fuel is greater than 10000 btu/lb, where the bio-fuel has a stability parameter of less than 30 cp/h; and    (2) operating a fuel-powered device, involving: (a) combusting a petroleum-derived fuel in a fuel-powered device to produce thermal and/or mechanical energy; and (b) combusting a biomass-derived fuel in fuel-powered device to produce thermal and/or mechanical energy, where the fuel-powered device is not mechanically modified to account for the fuel change between steps (a) and (b), where the biomass-derived fuel is produced via pyrolysis of biomass.