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Modeling and Characterization of Biomass Size Reduction

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2007 ASAE Annual Meeting  076047.(doi:10.13031/2013.23432)
Authors:   Ladan J. Naimi, Shahab Sokhansanj, Xiaotao Bi, C. Jim Lim, Alvin R Womac, Sudhagar Mani
Keywords:   Size Reduction, Swichgrass, Cutting Mill, Population Balance

Forestry and agricultural biomass are modern energy feedstock to produce process heat, power and liquid fuels. Preparation and pre-processing of biomass involve a number of operations including drying, size reduction, and fractionation. Among them, size reduction is one of the important operations, which consumes relatively high amount of energy. Depending on the type of biomass conversion technologies (such as combustion, gasification, fermentation and densification), special particle size ranges of materials is needed. In this paper, the mathematical modeling of particle size distribution of biomass (a fibrous material) during grinding is conducted based on the population balance method. The changes in the size distribution during the primary breakage of a narrow size are studied. The model developed to predict particle size distribution during grinding is validated with experimental data.

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