Fast pyrolysis of algae biomass in by fluidized-bed

To achieve comprehensive utilization algae biomass, pyrolysis process and fast pyrolysis experiment of sargassum, a kind of algae biomass, were performed in thermogravimetric analyzer and self-designed fluidized bed reactor, respectively. The thermogravimetric experiments results showed that pyrolysis process consisted of three stages: pre-pyrolysis, fast pyrolysis and slow pyrolysis. Because of the difference of thermal stability between polysaccharide and protein, two weight loss peaks were observed in the stage of fast pyrolysis. 450、500、550 and 600℃ were adopted in the fast pyrolysis experiments. The influence of reaction temperature on the collection rate of pyrolysis production was specially investigated. The results showed that char yield decreased steadily with rising of temperature, which was opposite to the gas product yield. The yield of bio-oil increased to a maximum value and then went down as temperature increased. The highest liquid yield of 30.5% was achieved at 500℃。