Surface Morphology and Combustion Characteristics of Biomass Micron Fuels

The surface morphology and combustion characteristics of micron-scale rice husks with different particle sizes were studied in detail by the fractal theory and thermogravimetric test. The calculation results by the box-counting dimension and erosion method were consistent with the actual data. The fractal dimensions first increased and then decreased with the rising particle sizes of rice husks. The largest fractal dimension and best combustion performance were found in 150 μm rice husk. The experiment results were verified finally by thermogravimetric tests, which were consistent with the theoretical results based on the fractal theory. The fractal theory of box-counting dimension and erosion provides a feasible method for studying biomass combustion characteristics.