Transport and Secondary Reactions of Depolymerized/Deconstructed Species
Pyrolysis is a robust and cost efficient way to convert biomass into biofuels and chemicals. Biomass pyrolysis involves a series of chemical reactions and physical phenomena, which are biomass depolymerization, volatilization of pyrolysis products, transport of pyrolysis vapor and bio-oil recovery. Due to the reactivity of pyrolysis products and elevated temperatures in the reactor, secondary reactions can take place. Heat and mass transfer limitation among biomass particles and the physiochemical properties of the pyrolysis products can also play important roles in biomass pyrolysis, determining final product distribution. In this chapter, secondary reactions of pyrolysis products and the transportation phenomena will be discussed for cellulose, lignin and biomass and previous studies will be reviewed.