NOVELTY - A system (S1) for conversion of biomass to diesel or jet fuel comprises: a device containing a number of processing stations (N) and a series of catalysts, where each processing station is capable of subjecting biomass within the station to at least one starting temperature (T(start)) to produce a volatile and a non-volatile component; and at least one catalyst reactor for receiving volatile components generated in each processing station, and where the catalyst reactor contains catalyst selected from dehydration catalyst, olefin oligomerization catalyst and hydrotreating catalyst.    USE - For conversion of biomass to diesel or jet fuel, where the biomass is selected from lipid, hemicellulose, cellulose and lignin, or is a mixture of at least two types of biomass selected from lipid, hemicellulose, cellulose and lignin. Also used for converting char to renewable fuel, where the renewable fuel comprises kerosene component or jet fuel component (all claimed).    ADVANTAGE - The present system maximizes conversion of biomass to jet fuel components; and also provides efficient conversion of biomass to higher value added products such as gasoline, diesel and jet fuel.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a system (S2) for converting char to a renewable fuel comprising a device containing several processing stations (N) and a series of catalysts, where each processing station is capable of subjecting char within the station to at least one starting temperature (T(start)) to produce syngas; and at least one catalyst reactor for receiving syngas generated in each processing station; and where the catalyst reactor contains a catalyst selected from syngas conversion catalyst, methanol synthesis catalyst, dimethyl ether (DME) synthesis catalyst, dehydration catalyst, olefin oligomerization catalyst and hydrotreating catalyst;    (2) converting (M1) biomass to diesel or jet fuel involving dispensing biomass into several processing stations (N); subjecting biomass within the station to at least one starting temperature to produce a volatile and a non-volatile component; directing the volatile component to at least one catalyst reactor designed to perform at least one of the process selected from dehydration, olefin oligomerization and hydrotreating; collecting the diesel or jet fuel produced in the catalyst reactor; and    (3) converting (M2) char to diesel or jet fuel involving dispensing char into several processing stations (N); subjecting char within the station to at least one starting temperature to produce syngas; directing the syngas to at least one catalyst reactor designed to perform at least one of the process selected from syngas conversion catalyst, methanol synthesis catalyst, DME synthesis catalyst, dehydration, olefin oligomerization and hydrotreating; and collecting the diesel or jet fuel produced in the catalyst reactor.