An improved method of providing heat to a pyrolysis reactor is disclosed. A solid heat carrier produces fast pyrolysis vapors during transport of the solid heat carrier/feedstock mixture down the shell of the main reactor tube by the reactor tube auger. These vapors are drawn from the main reactor tube by a slight vacuum pressure and are condensed in a multiple condenser train comprised of shell and tube condensers cooled by water or other means.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with Government support under DE-FG36-06GO86025 awarded by the U. S. Department of Energy. The Government has certain rights in the invention.