Recirculated system of biomass pyrolysis liquefaction plant

Based on the safety and economy analysis,the tail-gas recirculation in biomass pyrolysis liquefaction plant was investigated.The pyrolysis liquefaction experiments were conducted with or without the tail-gas recycling for comparison.The tail-gas was collected and then analyzed by gas chromatography.Results indicated that the major composition of the tail-gas is the same under the two different pyrolysis conditions,while the contents are different.The influence of non-condensate gas,such as CO,CO2 and CH4,to the biomass pyrolysis was theoretically analyzed,and the yield and composition of the produced bio-oil was evaluated.It is suggested that the tail-gas recirculation in biomass pyrolysis liquefaction plant is reasonable and feasible.