期刊文献+

Theoretical Approach to Concentration Distribution and Adhesion Efficiency of Fine Particles Around a Rising Bubble in Slurry Systems 被引量:1

Theoretical Approach to Concentration Distribution and Adhesion Efficiency of Fine Particles Around a Rising Bubble in Slurry Systems
下载PDF
导出
摘要 Quantitative prediction of distribution function and adhesionefficiency of particles around a rising bubble in slurry systems ispresented in this work. By solving the convection-diffusion equation(Fokker-Planck equation), the influence of Brownian diffusivity offine particles on concentration distribution and adhesion efficiencyis demonstrated with the hydrodynamic force and van der Waalsattractive potential between particles and bubble considered. It isfound that two kinds of mechanism dominate the adhesion process ofparticles on bubble according to different Peclet number or size ofparticles and bubble, as well as other properties of the slurrysystems. In addition, the viscosity ratio of bubble to the suspendingfluid was found to have obvious influence on particle adhesion. Quantitative prediction of distribution function and adhesion efficiency of particles around a risingbubble in slurry systems is presented in this work. By solving the convection-diffusion equation (Fokker-Planckequation), the influence of Brownian diffusivity of fine particles on concentration distribution and adhesion efficiencyis demonstrated with the hydrodynamic force and van der Waals attractive potential between particles and bubbleconsidered. It is found that two kinds of mechanism dominate the adhesion process of particles on bubble accordingaddition, the viscosity ratio of bubble to the suspending fluid was found to have obvious influence on particleadhesion.
出处 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第5期550-557,共8页 中国化学工程学报(英文版)
基金 Supported by the National Natural Science Foundation of China (No. 20126010).
关键词 adhesion efficiency Brownian diffusivity distribution function Fokker-Planck equation 浆料系统 上升气泡 微细颗粒 浓度分布 附着效率 理论研究 气液传质 蒸馏
  • 相关文献

参考文献23

  • 1Demmink, J.F., Mehra, A.,Beenackers, A.A.C.M., "Gasabsorption in the presence of particles showinginterfacialaffinity: Case of fine sulfur precipitates", Chem. Eng. Sci.,53 (16),2885-2902 (1998).
  • 2Kars, R.H., Best, R.J., Drinkenburg, A.A.H., "The adsorption of propane inslurries of active carbon inwater", J.Chem. Eng., 17, 201-210 (1979).
  • 3Zhou, M., Xu, C.J., Yu, G.C., "Adsorptive distillationNovel hybrid separationprocess", Progress in Natural Science, 5 (3), 291-298 (1995).
  • 4Alper, E., Wichtendahl, B., Deckwer, W.D., "Gas absorption mechanism incatalytic slurry reaction", Chem. Eng.Sci., 35 (1-3), 217-222 (1980).
  • 5Wimmers, O.J., de Sauvage Notting, H.J.J., Fortuin,J.M.H., "The effect of thesize of catalyst particles adhering to gas bubbles on the enhancement of gas absorptioninslurry reactors," Chem. Eng. Sci., 43 (8), 2155-2159(1988).
  • 6Zhang, X.G., Davis, R.H., "The rate of collisions due toBrownian orgravitational motion of small drops", J. FluidMech., 230, 479-504 (1991).
  • 7Batchelor, G.K., "Sedimentation in a dilute polydispersesystem of interactingspheres. Part 1. General theory", J.Fluid Mech., 119, 379-408 (1982).
  • 8Wen, C.S., Zhang, L., Lin, H., "The rate of coagulation ofparticles in asedimenting dispersion at large Péclet number", J. Colloid Interface Sci., 142(1), 257-265 (1991).
  • 9Melik, J.H., Fogler, H.S., "Effect of gravity on Brownianflocculation",J. Colloid Interface Sci., 101 (1), 89-97(1984).
  • 10Schulze, H.J., "Probability of particle attachment on gasbubbles bysliding", Advance in Colloid and Interface Sci.,40, 283-305 (1992).

引证文献1

二级引证文献1

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部