Interaction between chemical reactions and mixing on various scales
Jerzy Robert Bałdyga , J.R. Bourne , S.J. Hearn
AbstractThe way in which reagents are mixed can have a large influence on the product distribution of a chemical reaction. This has been analysed earlier when micromixing is the limiting mixing step. Additional segregation at a larger scale has only been treated in detail when the local turbulent dispersion of a feed stream was relevant. Here additional segregation due to the finite disintegration rate of large concentration eddies is represented by a feasible structure to describe the environment within which micromixing and chemical reaction take place. The resulting model contains one time constant each for micro- and mesomixing. Their estimation is discussed and applied to predicting the yields of fast complex reactions in plug-flow static mixers and in a semibatch stirred tank reactor under conditions where neither macromixing nor turbulent dispersion were limiting. The comparison with measured yields is good for micromixing and fairly satisfactory for inertial-convective mesomixing. Further research on this step is needed.
|Journal series||Chemical Engineering Science, ISSN 0009-2509|
|Publication size in sheets||0.5|
|Keywords in English||fast reactions, mesomixing, micromixing, semibatch reactor, static mixer, turbulent mixing|
|ASJC Classification||; ; ;|
|Publication indicators||= 124; : 2014 = 1.642; : 2006 = 1.629 (2) - 2007=1.995 (5)|
|Citation count*||145 (2015-03-28)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.