Improved fast pyrolysis bio‐oils from straw and miscanthus by fractionated condensation

Fast pyrolysis is one of the most promising conversion processes for producing advanced biofuels, which can be used as substitute fuel oils or chemicals. Herbaceous biomass due to its comparatively high amount cellulose and catalytically active inorganic content results in oil with water even if original was dry. Such bio-oil separates into two phases: an upper aqueous phase a bottom tarry phase. The separation by decantation not efficient method reduce total acid number because part valuable components will lost To improve quality bio-oils single-phase liquids staged condensation seems better method. minimum temperature leads liquid determined around 66°C wheat/barley straw 62°C miscanthus. A further increase result lower number, but goes along higher losses organics second stage.