Work package 3.2 - Scale-up of phase dispersion for structured multiphase reactors
Principal Investigator: Prof. Dr.-Ing. M. Grünewald (Ruhr-Universität Bochum)
PhD student: Corinna Hecht (Ruhr-Universität Bochum)
Main Scientific Goals:
The aim of this work package is selecting and characterizing distributor devices, which promise optimal process conditions and a high catalyst performance for two given reactor-catalysts-system.
- Investigation of the characteristic phase-distribution of different SiSiC-sponges in multiphase reactors
- Developing of distribution devices for catalytic SiSiC-Sponges in multiphase reactors
- Developing geometric conditions for periodic-open cell structures to improve the phase dispersion in multiphase reactors
- Developing distribution devices for custom-made periodic-open cell structure which are selected by geometric aspects
- Testing of compounds to substitute the hazardous compounds with compounds showing the same hydrodynamic behavior. (First results show good results for the substitution.)
a) Sponge structure:
As suggested by the project partners the characteristic phase-distribution of sponges with 10, 20, 30 and 45 pores per inch (Fig.: 1) are tested.
To investigate the distribution characteristics and to develop a distribution device a wire mesh sensor is installed (Fig. 2).
|Figure 1: SiSiC-Sponges with 10, 20, 30 and 45 pores per Inch.||Figure 2: Set-up to investigate the characteristic distribution and the optima distribution device for specific sponges.|
b) Periodic-open cell structure:
In cooperation with the TU Hamburg-Harburg a method to predict the free bubble rise in periodic-open cell structures is developed. As a result two periodic-open cell structures (Fig. 3) are printed by means of a rapid prototype printing. To investigate the quality of the phase-distribution integral and radial holdups are measured by means of a wire mesh sensor device (Fig. 4).
|Figure 3: Periodic-open cell structure with a cell angle of 90°.||Figure 4: Experimental set-up to measure the hydrodynamic behavior in periodic-open cell structures.|
WP 2.1 : Develop the optima open-cell structure for an energy-enhancing application
WP 3.1 : Cooperation in investigating the hydrodynamic behavior in sponge reactors
WP 3.3 : Information about the mass transfer enhancing in bubbly flow by means of periodic-open cell structures
WP 4.3 : Verification of the distribution characteristics in sponge reactors
- C. Hecht, M. Grünewald, Ruhr-Universität Bochum, C.-O. Möller, D. Bezecny, M. Schlüter, Technische Universität Hamburg-Harburg, New Structures for Enhancing Mass Transfer within Bubble Columns – From Mass Transfer Oberservations to Technical Implementation, International Symposium on Multiscale Multiphase Process Engineering - Hamburg, September 24-27, 2014.