Characterization of micronized wood and energy-size relationship in wood comminution

Jinxue Jiang; Jinwu Wang; Xiao Zhang; Michael Wolcott

doi:10.1016/j.fuproc.2017.03.015

Treesearch

Characterization of micronized wood and energy-size relationship in wood comminution

Formally Refereed

Authors:

Jinxue Jiang, Jinwu Wang, Xiao Zhang, Michael Wolcott

Year:

2017

Type:

Scientific Journal

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.1016/j.fuproc.2017.03.015

Source:

Fuel Processing Technology. 161: 76-84.

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Abstract

Mechanical milling demonstrates potential in the pretreatment arena to valorize lignocellulosic biomass because it eliminates chemicals and simplifies processing. The development of physical properties and energy consumption for generating micronized particles are key factors affecting potential use. This study investigated the effect of input moisture content, and feedstock particle size on developing physical characteristics of micronized particles and the resultant specific energy consumption in the milling process. Wood particles with different sizes were effectively comminuted to b20-μm within several minutes using a vibratory ring and puck mill. Moisture content was found to be a key factor influencing the development of particle morphology and crystallinity. Lower moisture content resulted in much rounder particles with lower crystallinity, while higher moisture content resulted in the micronized particles with larger aspect ratio and crystallinity. Crystallinity index and median aspect ratio of the micronized particleswere linearly correlated. The particle size change during millingwas highly correlated to the specific energy consumption of milling through the Rittinger's model (0.91

Keywords

Fine milling, woody biomass, morphology, crystallinity, specific energy consumption, particle size distribution, aspect ratio

Citation

Jiang, Jinxue; Wang, Jinwu; Zhang, Xiao; Wolcott, Michael. 2017. Characterization of micronized wood and energy-size relationship in wood comminution. Fuel Processing Technology. 161: 76-84.