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

Source: Fuel Processing Technology. 161: 76-84.

Author(s)Jiang, Jinxue ; Wang, Jinwu ; Zhang, Xiao ; Wolcott, Michael

Publication Year: 2017  View PDF »

Category: Journal Articles
Associated Research Project(s):   FPL-4706-1B

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 (0.912 < 0.96). Input moisture content and feed size were found to affect the energy intensity of grinding woody biomass. The Rittinger's constant was a good indicator of the material performance in this area. The results will provide a guidance for preferred milling conditions as well as designing scalable micronizing mills.

Keywords: Fine milling; woody biomass; morphology; crystallinity; specific energy consumption; particle size distribution; aspect ratio

Publication Review Process: Formally Refereed

File size: 2,048 kb(s)

Date posted: 02/22/2019

This publication is also viewable on Treesearch:  view
RITS Product ID: 93581
Current FPL Scientist associated with this product
Wang, Jinwu
Research Forest Products Technologist

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