Abstract: The present invention describes a process for a controlled conversion of a biomass feedstock, wherein the process comprises the steps of: loading the biomass feedstock to at least one reactor; liquefaction of the biomass feedstock into a monomer and/or oligomer sugar mixture in said reactor by treatment in hot compressed liquid water (HCW) at sub- and/or super-critical condition; and removal of the monomer and/or oligomer sugar mixture, being the product molecules, to avoid continued detrimental decomposition.

Abstract: The present invention relates to a method of production of a fuel containing at least one hydrocarbon from a biomass, comprising the steps of: -A) chemical decomposition of the biomass in a solvent to at least one chemical intermediate compound chosen from the group consisting of a hexose, a pentose and a derivative of lignin, or a combination thereof, optionally produced together with at least one other target chemical, to form a first solution; - B) complete reduction of the first solution with a reducing agent to at least one hydrocarbon to form a fuel; wherein the steps A) and B) are performed below 300° C.