NOVELTY - Pyrolysis system (S1) (100) comprises: a pyrolyzer (110); and a primary condenser (130) that is coupled to the pyrolyzer and configured to receive pyrolytic vapors from the pyrolyzer, and further configured to condense the pyrolytic vapors by contacting the pyrolytic vapors with a condensing liquid (132) to form a bio-oil component mixture having multiple separated phases, where at least a portion of the condensing liquid comprises a fraction that is extracted as a separated stable phase from a second bio-oil component mixture resulting from a prior pyrolysis cycle.    USE - The pyrolysis system is useful for extracting bio-oil components from a bio-oil vapor (claimed), where the bio-oil components are useful for wide variety of fuels.    ADVANTAGE - The pyrolysis system: provides the bio-oil components, which exhibit high yield, purity and stability, can be used directly in conjunction with a wide variety of fuels, and can be produced in an economical manner; and utilizes the condensing liquid, which exhibits desired viscosity, can be recycled, minimizes the losses downstream, and avoids the occurrence of contamination in the system.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) a condensing liquid comprising a stable phase liquid extracted from a first bio-oil component mixture having multiple separated phases resulting from first condensed pyrolysis vapors, where the condensing liquid is used to condense second pyrolysis vapors during a second pyrolysis process;    (2) a system (S2) for pyrolyzing material, comprising: the pyrolyzer; the primary condenser; a capture vessel to receive the bio-oil component mixture; and a recirculator (142) coupled to the capture vessel and the primary condenser, where the recirculator is configured to provide at least one of the multiple phases of the bio-oil component mixture as a second condensing liquid for use as at least a portion of the condensing liquid used in the primary condenser; and    (3) extracting bio-oil components from a bio-oil vapor, comprising: pyrolyzing a material to generate a bio-oil vapor stream; condensing a first amount of the bio-oil vapor stream with the condensing liquid to produce a bio-oil component mixture having multiple separated phases; extracting at least one of the multiple separated phases as an extracted liquid; and utilizing at least a portion of the extracted liquid as a second condensing liquid.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the system for extracting bio-oil components from pyrolyzed material.    Pyrolysis system (100)    Pyrolizer (110)    Primary condenser (130)    Condensing liquid (132)    Recirculator (142)