DRYING KINETICS OF HIGHLY-DISPERSED PARTICLES OF MAGNESIUM HYDROXIDE
Highly-dispersed magnesium hydroxide particles,average particle diameter of about 20μm,were synthesized by direct precipitation approach.Drying kinetics experiments of the highly-dispersed magnesium hydroxide particles were carried out,and drying curves as well as drying rate curves were obtained at different hot air temperatures or different material layer thicknesses,respectively.Drying experimental data of the highly-dispersed magnesium hydroxide particles were fit based on Weibull function model,and drying equation as well as drying rate equation were obtained.In addition,drying kinetics parameters,including scale parameter,shape parameter,length constant,activation energy of interface evaporation,diffusion activation energy,apparent activation energy,and frequency factor etc.,were determined.Investigation results indicate that Weibull function model adequately describes drying kinetics equations of the highlydispersed magnesium hydroxide particles and scale parameter is related to hot air temperatures and material layer thicknesses.With increase of hot air temperature or decrease of material layer thickness,scale parameter and drying rate increase,while shape parameter is approximately invariant.
drying kinetics drying kinetics parameters magnesium hydroxide particles Weibull function
Yunbo Wang Baohe Wang Qun Li Liangzhi Xia Caiyuan Yu Wei Wang
School of Chemical Engineering,Dalian University of Technology,Dalian,P.R.China,116024 School of Chemical Machinery,Dalian University of Technology,Dalian,P.R.China,116024 College of Life Science,Dalian Nationalities University,Dalian,P.R.China,116600
国际会议
The 18th International Drying Symposium Conference(第十八届国际干燥学术大会(IDS2012))
厦门
英文
1-8
2012-01-11（万方平台首次上网日期，不代表论文的发表时间）