煤炭转化2025，Vol.48Issue(6)：79-89,11.DOI:10.19726/j.cnki.ebcc.202506007
纳米煤颗粒的制备与表征及在液固相中的分布状态研究
Preparation and characterization of nano-coal particles and their distribution in liquid and solid phases
摘要
Abstract
To further investigate the binding forms and existence states of organic matter and inorganic minerals in coal,a planetary ball mill was employed to prepare nano-sized coal particles through ultrafine grinding of macroscopic coal samples.The effects of coal slurry mass concentrations(120 g/L,60 g/L,30 g/L,15 g/L,7 g/L)and ball milling time(12 h,18 h,24 h)on the prepara-tion of nano-coal particles were explored.The prepared nano-coal particles were subsequently charac-terized using XRD,EDS,and BET nitrogen adsorption techniques,and analyses were conducted on their distribution states in both liquid and solid phases.The results show that nano-scale coal particles are obtained under coal slurry mass concentrations of 7 g/L-30 g/L and ball milling time≥12 h.The smallest particle size is obtained at 30 g/L.Nitrogen adsorption results show that the maximum nitro-gen adsorption capacity of nano-coal particles increases significantly to about 185 cm3/g due to their larger specific surface area,and the rate of nitrogen monolayer adsorption increases with the decrease in average particle size.Nano-coal particles present only graphite diffraction peaks in XRD patterns,differing from macroscopic coal particles.EDS detects particles compose exclusively of carbon and oxygen.In liquid phase,nano-coal particles form multi-particle aggregates,where smaller average par-ticle size corresponds to smaller aggregate sizes,higher aggregation density,and the maximum aggre-gation particle size is nearly 300 times the average size of a single particle.In the solid phase,particles are uniform distributed,and smaller average particle size corresponds to larger contact angles.This study demonstrates that nano-coal particle size critically governs macroscopic properties such as con-tact angle and aggregation behavior.These findings provide valuable insights for applications in coal-ash separation and ultra-pure coal production.关键词
纳米材料/煤颗粒/粒径/颗粒性质/分布状态Key words
nanomaterials/coal particles/particle size/granular properties/distribution分类
矿山工程引用本文复制引用
王向廷,张继龙,谢泽钰,李涌,徐丽红..纳米煤颗粒的制备与表征及在液固相中的分布状态研究[J].煤炭转化,2025,48(6):79-89,11.基金项目
山西省"1331工程"资助项目(2018-5-2)和山西省基础研究计划项目(202203021211142). （2018-5-2）
