Abstract
The monolith bed is one of the promising catalytic reactors for a number of chemical gas–liquid–solid processes. In the present work, liquid saturations for five different monoliths have been investigated experimentally in a cold-flow unit with a reactor diameter of 5.0 cm. The influences of gas and liquid flow rates and of the direction of two-phase flow on liquid saturation were examined. The results indicate that the direction of flow has no significant influence on liquid saturation for proper gas–liquid distribution. The experimental results are in good agreement with predictions of the drift flux model using the distribution parameter proposed by Ishii (ANL Report ANL-77-47, 1977) along with the assumption of zero drift velocity. In preliminary experiments, gamma-ray computed tomography (CT) has been successfully applied to measure time-averaged liquid distribution over the monolith cross-section in a selected condition. The employment of a nozzle-type distributor provides an almost uniform liquid distribution over the monolith substrate. It is demonstrated that CT is a viable technique for studying two-phase flow in laboratory-scale monolith reactors.
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