Investigation of the Two‐Phase Flow in Trickle‐Bed Reactors Using Capacitance Tomography

Hydrodynamics of cocurrent two‐phase flows in slanted porous media—Modulation of pulse flow via bed obliquity

“…An Eulerian slice representation of ECT images is used to visualize the axial development of the liquid-flow field. 34 Pixelized liquid saturations (Eq. 4) reconstructed along a selected diametrical line (e.g., A-A line in Figure 9a) are shot in a volley at 50 Hz pace as recorded and plotted one after the other from individual images recorded during two-phase flow operation.…”

Mathematical concepts for image reconstruction in tomography

“…This back projection is conceptually very simple and straightforward; however, many assumptions are engaged in the algorithm, and in fact the image reconstruction performance may not be so plausible. To improve the image quality some modifications of the sensitivity matrix have been suggested (Kim, Choi, & Kim, 2006;Reinecke & Mewes, 1997;Villares et al, 2012).…”

Applications of tomography in bubble column and trickle bed reactors

“…Alternatively, it is possible to devise portable CT systems that can achieve relatively high spatial resolution and full tomographic reconstructions, though these may have other restrictions regarding the size of the equipment on which they can be applied (Bieberle et al, 2013;Kim et al, 2012). Electrical tomography techniques have also proven beneficial for studying trickle bed reactors owing to the high time resolution that can be achieved (Bieberle et al, 2010;H€ afeli, Hutter, Damsohn, Prasser, & Rudolf von Rohr, 2013;Llamas et al, 2008;Matusiak, Jose, Hampel, & Romanowski, 2010;Reinecke & Mewes, 1997). Measurements of the conductivity require the conductive phase to be continuous, which is not often the case in a trickle bed.…”