TY - JOUR
T1 - Numerical simulation of growing Cu particles in a Kenics static mixer reactor in which Cu2+ is reduced by carbohydrates
AU - Van Wageningen, W. F.C.
AU - Mudde, R. F.
AU - Van Den Akker, H. E.A.
PY - 2004/11
Y1 - 2004/11
N2 - Numerical simulations of the mixing of copper ions (Cu(II)) and growing particles have been performed in the range of Re 10-1000 in a vertical (down-flow) Kenics static mixer reactor. The growth of the particles is based on the local Cu(II) concentration and determines the reduction rate of the Cu(II) concentration, which is solved with a finite volume code. The particles are tracked using a code that solves the BBO equation and the flow is solved using a Lattice Boltzmann code. It was found that the Kenics static mixer enhances the mixing of Cu(II). However, at low Reynolds numbers (Re < 500) the particles are not well mixed, which has a negative influence on the particle size distribution (PSD). Furthermore, in a pipe (without a mixer) the PSD is more narrow than in a Kenics static mixer reactor, but the Cu(II) concentration is not well mixed in a pipe, which slows down the reduction process. Results indicate that a high Reynolds number is necessary to mix both the particles and Cu(II) concentration in the Kenics static mixer.
AB - Numerical simulations of the mixing of copper ions (Cu(II)) and growing particles have been performed in the range of Re 10-1000 in a vertical (down-flow) Kenics static mixer reactor. The growth of the particles is based on the local Cu(II) concentration and determines the reduction rate of the Cu(II) concentration, which is solved with a finite volume code. The particles are tracked using a code that solves the BBO equation and the flow is solved using a Lattice Boltzmann code. It was found that the Kenics static mixer enhances the mixing of Cu(II). However, at low Reynolds numbers (Re < 500) the particles are not well mixed, which has a negative influence on the particle size distribution (PSD). Furthermore, in a pipe (without a mixer) the PSD is more narrow than in a Kenics static mixer reactor, but the Cu(II) concentration is not well mixed in a pipe, which slows down the reduction process. Results indicate that a high Reynolds number is necessary to mix both the particles and Cu(II) concentration in the Kenics static mixer.
KW - Laminar flow
KW - Mass transfer
KW - Mixing
KW - Numerical simulation
KW - Particle tracking
KW - Static mixer
UR - http://www.scopus.com/inward/record.url?scp=10044243746&partnerID=8YFLogxK
U2 - 10.1016/j.ces.2004.07.102
DO - 10.1016/j.ces.2004.07.102
M3 - Article
AN - SCOPUS:10044243746
SN - 0009-2509
VL - 59
SP - 5193
EP - 5200
JO - Chemical Engineering Science
JF - Chemical Engineering Science
IS - 22-23
ER -