A novel method for determining residence time distribution in intricately structured microreactors.
A precise characterisation of microreactors can be achieved by determining the residence time distribution as one of the most important flow characteristics. An approach specially designed for microreactor applications was developed, which employs a tracer 'injection' using the optical activation of a caged fluorescent dye. Furthermore, the effect of the laminar flow on the determination of the residence time distribution in microreactors has been taken into account during the measurements and their interpretation to fulfill the requirements of the so-called 'mixing-cup-problem' on the microscale. Residence time distributions for an intricately structured thin microreactor were determined for different velocities. The ideality of the stimulus signal generated by the newly introduced technique is demonstrated for an analytically well-defined straight channel and compared with a signal derived from deconvolution of non-ideal input signals.
Lohse
Sebastian
S
Technical Chemistry B, Faculty Biochemical- and Chemical Engineering, Technische Universität Dortmund, Dortmund, Germany.
Kohnen
Boris Terje
BT
Janasek
Dirk
D
Dittrich
Petra Stephanie
PS
Franzke
Joachim
J
Agar
David William
DW
D004864:Equipment and Supplies; D005456:Fluorescent Dyes
D005456:Fluorescent Dyes