Micromixing in a static mixer and an empty tube by a chemical method

• Published in: Chemical Engineering Science, vol. 43, num. 8, p. 1955-60
• Publication date: 1988

Micromixing in a static mixer and an empty tube was characterized by the product distribution of fast consecutive competing reactions. As a test reaction, the pptn. of BaSO4 complexed by EDTA in alk. medium under the effect of an acid was used. The acid was injected at a point of the reactor into an excess of basic complex. The pptd. BaSO4 is a measure of the degree of segregation which can be characterized by an index Xs, representing the amt. of macrofluid in the partially segregated fluid. Expts. were carried out in a tubular reactor and in a static mixer in the laminar flow regime (0.4 < Reynolds no. < 300) by varying the fluid viscosity (10-3 < m < 26 * 10-3 kg/ms) and the flow rate. Furthermore, the characteristic reaction time tr was varied from .apprx.1 to 75 s. Depending on the exptl. conditions, the Xs was 0.1-0.3 for the mixer and from 0.2-0.75 for the empty tube. The micromixing time, tm, was deduced from Xs and tr. The mixing tm was .apprx.10 times larger in an empty tube than in the static mixer. [on SciFinder (R)]

Keywords: Reynolds number (Damkoehler no. of micromixing with reaction in static mixer and tube in relation to); Reaction (mixing with ; in static mixer and tube); Dimensionless number (Damkoehler ; of micromixing in reaction and static mixer and tube); Mixing (mic ; micromixing reaction; flow micromixing reaction; segregation micromixing reaction; mixing segregation reaction; viscosity micromixing reaction

Note:

CAN 109:112724, 48-8, Unit Operations and Processes, Inst. Genie Chim.,Ec. Polytech. Fed. Lausanne,Lausanne,Switz., Journal, 0009-2509, written in English.

Reference

• LGRC-ARTICLE-1988-002
• doi:10.1016/0009-2509(88)87068-4
• View record in Web of Science

Record created on 2006-04-18, modified on 2017-05-12