Classification of macroalgae as fuel and its thermochemical behaviour
A B Ross1, J M Jones, M L Kubacki
1Energy and Resources Research Institute, School of Process, Environmental and Materials Engineering, University of Leeds, Woodhouse Lane, Leeds LS29JT, UK. a.b.ross@leeds.ac.uk
Bioresource Technology
|January 16, 2008
Summary
This study classifies macroalgae for thermal conversion, finding pyrolysis yields high char and nitrogen compounds, while ash content limits direct combustion. Macroalgae offer potential for bioenergy applications.
Area of Science:
- Biomass characterization
- Thermochemical conversion of algae
Background:
- Macroalgae present a potential sustainable feedstock for bioenergy.
- Understanding their thermal conversion properties is crucial for effective utilization.
Purpose of the Study:
- To classify macroalgae using Van Krevelen diagrams.
- To evaluate their thermal conversion behavior (combustion and pyrolysis).
- To compare macroalgae with terrestrial biomass for energy applications.
Main Methods:
- Proximate and ultimate analysis, inorganic content, and calorific value determination.
- Thermogravimetry (TGA) for combustion and pyrolysis analysis.
- Pyrolysis-gas chromatography-mass spectrometry (Py-GC-MS) for product identification.
Main Results:
- Macroalgae were classified via Van Krevelen diagrams.
- Ash chemistry restricts direct combustion and gasification.
- Pyrolysis yields significant pentosans, nitrogen compounds, and high char.
Conclusions:
- Macroalgae exhibit distinct thermal conversion characteristics compared to terrestrial biomass.
- Pyrolysis is a promising route for macroalgae valorization due to high char and valuable byproducts.
- Further research is needed to overcome ash-related limitations for combustion and gasification.
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