Micromixing efficiency in static mixer

Abstract This work quantitatively measured the micromixing efficiency in the Kenics static mixer at Reynolds number ranging from 66–1,020 on the basis of a unique parallel competing reaction scheme proposed by Villermaux et al. Employment of the Kenics static mixer initiated early transition to turbulent flow. Furthermore, the mixer could markedly enhance the micromixing efficiency in both the laminar and turbulent flow regimes when compared with that in an empty tube. The mixing times data estimated according to an incorporation model substantially decreased with increasing Reynolds number, and ultimately reached a low level of 10 −3 s in the turbulent flow regime. The present static mixer could yield better micromixing efficiency than that in a continuous-flow stirred tank reactor (CSTR) at the same power consumption rate.

[1]  E. B. Nauman,et al.  On residence time and trajectory calculations in motionless mixers , 1991 .

[2]  J. Villermaux,et al.  Extension of a chemical method for the study of micromixing process in viscous media , 1997 .

[3]  J. Bourne,et al.  Mixing effects in the bromination of resorcin , 1977 .

[4]  Julio M. Ottino,et al.  A case study of chaotic mixing in deterministic flows: The partitioned-pipe mixer , 1987 .

[5]  Duu-Jong Lee,et al.  Micromixing Effects in Aerated Stirred Tank , 1997 .

[6]  Edward L. Paul,et al.  The effect of mixing on scaleup of a parallel reaction system , 1992 .

[7]  P. Pustelnik,et al.  Residence time distribution of a power-law fluid in Kenics static mixers , 1988 .

[8]  E. B. Nauman,et al.  Reactions and residence time distributions in motionless mixers , 1982 .

[9]  J. Bourne,et al.  Mixing effects during the bromination of 1,3,5-trimethoxybenzene , 1977 .

[10]  Fernando J. Muzzio,et al.  Effects of injection location, flow ratio and geometry on kenics mixer performance , 1997 .

[11]  A. Tobgy,et al.  Residence times, micromixing and conversion in an un-premixed feed reactor — II: Chemical reaction measurements , 1973 .

[12]  Laurent Falk,et al.  A new parallel competing reaction system for assessing micromixing efficiency—Determination of micromixing time by a simple mixing model , 1996 .

[13]  Duu-Jong Lee,et al.  Micromixing effects in a stirred tank: The random replacement IEM model , 1996 .

[14]  Duu-Jong Lee,et al.  Micromixing and Macromixing Effects in Unsteady Chemical Reaction System , 1999 .

[15]  S. Middleman,et al.  Fundamentals of polymer processing , 1977 .

[16]  F. Muzzio,et al.  The Kenics Static Mixer : a Three-dimensional Chaotic Flow , 1997 .

[17]  Krishna D.P. Nigam,et al.  Residence time distribution in static mixer , 1980 .

[18]  John R. Bourne,et al.  Mixing and fast chemical reactionITest reactions to determine segregation , 1981 .

[19]  Chemical selectivities disguised by mass diffusion. V. Mixing-disguised azo coupling reactions. 6th communication on the selectivity of chemical processes†‡†§ , 1977 .

[20]  E. B. Nauman,et al.  Residence time distributions of power law fluids in motionless mixers , 1985 .

[21]  B H Junker,et al.  Cultivation of attenuated hepatitis A virus antigen in a titanium static mixer reactor , 1994, Biotechnology and bioengineering.

[22]  Ottino,et al.  Visualization of three-dimensional chaos , 1998, Science.

[23]  Julio M. Ottino,et al.  Mixing and chemical reactions a tutorial , 1994 .

[24]  Laurent Falk,et al.  A new parallel competing reaction system for assessing micromixing efficiency—Experimental approach , 1996 .

[25]  Fernando J. Muzzio,et al.  Using time-dependent RPM to enhance mixing in stirred vessels , 1996 .

[26]  Fernando J. Muzzio,et al.  Numerical characterization of low Reynolds number flow in the Kenics static mixer , 1998 .

[27]  S. J. Chen.  In-Line, Continuous Mixing and Processing of Cosmetic Products , 1973 .

[28]  Duu-Jong Lee,et al.  Micromixing effects in a Couette flow reactor , 1999 .

[29]  Fernando J. Muzzio,et al.  Optimization of a static mixer using dynamical systems techniques , 1998 .

[30]  Duu-Jong Lee,et al.  Quantitative Estimation of Segregation Indices in CSTR—Effects of Feed Stream and Output Port , 2000 .