| 초록 |
Sargassum sp. is a kind of macro-algae, Sargassum sp. can be converted into bio-oil, gas, and char through fast pyrolysis. In this study, the fast pyrolysis of Sargassum sp. was performed in a bubbling fluidized-bed reactor under various reaction conditions to investigate the effect of these parameters on the product yields and the qualities of bio-oil. The highest yield of bio-oil was 36.26%, obtained at a pyrolysis temperature of 450oC with fluidization velocity of 4.0 x Umf. The gas compositions included CO, CO2, H2, and C1~C4 hydrocarbons, but different concentration depending on reaction temperature. The bio-oil showed high selectivity for levoglucosan, di-anhydromannitol, pyridinol, derivatives ketone and small amounts of phenolic species. The 13C NMR showed that shorter aliphatic carbons and lower molecular weight compounds of carbohydate, ketone, and their derivatives were generated during pyrolysis at higher temperatures due to secondary decomposition reactions
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