NOVELTY - A method (M1) for producing high carbon content products from biomass, involves: adding a biomass oil to a cracking reactor vessel; heating the biomass oil in the cracking reactor vessel to a temperature of 100-800 degrees C at a vacuum pressure of 20700 kPa (3000 psia) for a time sufficient to crack the biomass oil; separating tar from cracked biomass oil; and heating the tar to a temperature of 200-1500 degrees C at a vacuum pressure of 20700 kPa (3000 psia) for a time sufficient to reduce the tar to a high carbon content product containing carbon (at least 50 wt.%).    USE - For producing high carbon content products from biomass (claimed).    ADVANTAGE - The method utilizes cracking and carbonization reactions coupled with separation techniques, thus develop biomass-based high carbon content products that replace commercially available products generated from non-renewable sources and other renewable sources.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a high carbon content product produced by the method (M1), where the high carbon content product contains carbon (at least 50%); and    (2) a method (M2) for producing a high carbon content product, short chain carboxylic acids and a fuel composition having a low cloud point from biomass, involving: heating a biomass oil in a reactor vessel to a temperature of 100-800 degrees C at a vacuum pressure of 20700 kPa (3000 psia) for a time sufficient to crack the biomass oil; collecting fractions of cracked biomass oil including at least one of 4-16C alkanes, alkenes, aromatics, cycloparaffins, or alcohols; 2-16C fatty acids; or 2-16C fatty acid methyl esters and combining collected fractions of cracked biomass oil to produce a fuel composition having a cloud point less than -10 degrees C; collecting a mixture from the cracked biomass oil containing 2-16C carboxylic acids; and separating tar from the cracked biomass oil and heating the tar to a temperature of 200-1500 degrees C at a vacuum pressure of 20700 kPa (3000 psia) for a time sufficient to reduce the tar to a high carbon content product containing carbon (at least 50 wt.%).