The effect of hemicellulose on the interparticle frictional behavior of lignocellulosic biomass particulates  

作　　者：Ekramul Haque Ehite Eric Drumm Nourredine Abdoulmoumine 

机构地区：[1]Biosystems Engineering and Soil Science Department,University of Tennessee,Knoxville,TN 37996,USA [2]Center for Renewable Carbon,University of Tennessee,Knoxville,TN 37996,USA

出　　处：《Particuology》2021年第2期16-22,共7页颗粒学报（英文版）

基　　金：The authors would like to acknowledge funding support for this research by UTIA AgResearch through AgResearch Tuition Program.

摘　　要：Lignocellulosic biomass material sourced from plants and herbaceous sources is considered as a prospective feedstock of inexpensive,potentially carbon-neutral energy.Lignocellulosic biomass is structurally built on cellulose,hemicellulose,and lignin,which are present in varying concentrations based on the feedstock type and play distinct and not well understood mechanical functions in the flow behavior.The frictional characteristics of lignocellulosic biomass particulates influence their flow behavior in biorefineries.Thus,it is important to fundamentally investigate the relative contribution of cellulose,hemicellulose,and lignin to the frictional behavior.However,these three biopolymers are interwoven into a complex matrix in the lignocellulosic biomass,thus making it hard to quantify the contribution of each biopolymer.In this study,we selectively remove hemicellulose from switchgrass and investigate the effects of its diminishing concentration on the coefficient of friction.We observed that the angle of repose and,therefore,the coefficient of friction for a loose assembly of the control and treated switchgrass samples decrease with decreasing hemicellulose content.This indicates the frictional resistance to flow for biomass particulate assemblies is at least proportional to the hemicellulose content.We also established that the observed changes in the frictional behavior were not due to particle morphological characteristics.

关 键 词：Lignocellulosic biomass Frictional behavior Angle of repose Hot water extraction SWITCHGRASS Hemicellulose removal 

分 类 号：TH117[机械工程—机械设计及理论]