The fast pyrolysis process development unit converts dry biomass into bio-oil through a thermochemical process that includes rapidly heating the biomass to high temperatures (450C to 550C) in an oxygen free environment. It can process up to 8 kg/hr of biomass. The current system utilizes a fluidized bed of sand to provide the necessary heat transfer to reach the rapid heating that is necessary. The sand is fluidized by compressed nitrogen. Fast pyrolysis has three main products which include bio-oil, char, and various gases.