摘要
为探究生物质三组分(纤维素、半纤维素和木质素)对成型颗粒物理性能的影响,以棉秆、木屑以及生物质三组分为研究对象,单独或按一定掺混比例混合后制备成型颗粒,使用电子万能材料试验机分析了成型颗粒的表观密度和抗压强度,利用X射线光电子能谱仪分析了生物质成型前后分子结构的变化。结果表明:纤维素直接影响成型颗粒的抗压强度,半纤维素和木质素主要作为黏结剂,协同纤维素间接提高成型颗粒的抗压强度。向棉秆中加入纤维素或半纤维素后,其混合成型颗粒中的C—OH官能团均明显提高,且产生了新的C=C官能团,有利于形成分子间作用力和提高分子结构的稳定性,增强成型颗粒的物理性能。
To explore the effect of biomass components such as cellulose,hemicellulose and lignin on physical properties of pellets,cotton stalk and wood sawdust were mixed with their components at different mass ratios to prepare the pellets.The apparent density and compressive strength of pellets were analyzed by electronic universal material testing machine.The biomass molecular structure before and after briquetting was analyzed by X-ray photoelectron spectroscopy.Results show that the compressive strength of pellets is directly affected by cellulose,meanwhile hemicellulose and lignin mainly act as binders to improve the compressive strength of pellets indirectly.The addition of cellulose or hemicellulose to cotton stalk significantly increases the C—OH functional group in its pellets,and C=C functional group is formed,which are conducive to form the intermolecular force and increase the stability of molecular structure.They can enhance the physical properties of pellets.
作者
黄健添
张守玉
郎森
陈旭阳
张邢佳
徐梓航
马达夫
吴玉新
吕俊复
HUANG Jiantian;ZHANG Shouyu;LANG Sen;CHEN Xuyang;ZHANG Xingjia;XU Zihang;MA Dafu;WU Yuxin;LÜ Junfu(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanxi Research Institute of Huairou Laboratory,Taiyuan 030032,China;Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2024年第5期727-734,共8页
Journal of Chinese Society of Power Engineering
基金
国家自然科学基金重点国际(地区)合作研究资助项目(51761125011)。
关键词
生物质
三组分
成型颗粒
抗压强度
分子结构
biomass
three components
pellets
compressive strength
molecular structure
