Abstract
The pyrolysis of two brown macroalgae (Undaria pinnatifida and Laminaria japonica) and one red macroalgae (Porphyra tenera) was investigated for the production of bio-oil within the temperature range of 300-600°C. Macroalgae differ from lignocellulosic land biomass in their constitutional compounds and high N, S and ash contents. The maximum production of bio-oil was achieved at 500°C, with yields between 37.5 and 47.4wt.%. The main compounds in bio-oils vary between macroalgae and are greatly different from those of land biomass, especially in the presence of many nitrogen-containing compounds. Of the gaseous products, CO2 was dominant, while C1-C4 hydrocarbons gradually increasing at 400°C and above. The pretreatment of macroalgae by acid washing effectively reduced the ash content. The pyrolysis of macroalgae offers a new opportunity for feedstock production; however, the utilization of bio-oil as a fuel product needs further assessment.
Original language | English |
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Pages (from-to) | 3512-3520 |
Number of pages | 9 |
Journal | Bioresource Technology |
Volume | 102 |
Issue number | 3 |
DOIs | |
State | Published - Feb 2011 |
Keywords
- Laminaria japonica
- Macroalgae
- Porphyra tenera
- Pyrolysis
- Undaria pinnatifida