| 초록 |
The pyrolysis characteristics of non-edible Saccharina japonica were systematically investigated using a bubbling fluidized-bed reactor. Before pyrolysis, the wet biomass of S. japonica was directly crushed into a particle size range between 1 and 3 cm using a twin-screw shredder on site. Pilot scale (150 L) pre-treatment of water washing for demineralization was performed by a weight ratio of 1:2 (wet biomass:water) at room temperature with stirring for 2 h, as an optimum condition of the lowest ash content. The yields of bio-oil was 25.57-31.27 wt% in the conditions of pyrolysis temperature (350-450 °C) and fluidization velocity (2.0-4.5 U/Umf). The yield of bio-oil at 375 °C and 4.0 U/Umf was maximal 31.27 wt%, and the HHVs of dark (i.e., organic) and transparent (i.e., aqueous) oil fractions in the bio-oil were 31.47 and 5.41 MJ/kg, respectively. The major compounds in the bio-oil were dianhydromannitol, phenols, indoles, cyclopentens and furans, showing the high selectivities. |
