Abstract
ABSTRACT Size reduction is one of the major pre-processing operations in using biomass as a source of energy or rawmaterials for forest products industry. The grinding characteristics of dried yellow poplar wood chips wereinvestigated using laboratory knife mill with three different screen aperture diameters to provide the basicinformation for the optimizing of size reduction processes in biomass industry. Average specific energy con-sumptions were 0.157, 0.137, and 0.093 Wh/g for the screen aperture diameters of 5.0, 7.5, and 9.0 mm, respectively. According to the results of size distribution analysis of ground particles, the sizes of the most of ground particles were much smaller than the aperture diameters of the screens installed on knife mill used in this study. Keywords : size reduction, biomass, knife mill, specific energy consumption for milling, particle size distribution, Liriodendron tulipifera L. 1 Date Received November 19, 2015, Date Accepted December 28, 2015 2 College of Agriculture and Life Science, Chonnam National University, Gwangju 61186, Republic of Korea
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