HYDRODYNAMICS AND GAS-LIQUID-SOLID INTERFACIAL PARAMETERS OF CO-CURRENT DOWNWARD TWO-PHASE FLOW IN TRICKLE-BED REACTORS

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Abstract
Design of trickle-fixed bed reactors requires knowledge of the hydrodynamics of two-phase co-current downward flow through fixed porous catalytic media and interfacial parameters. Unfortunately, most of the published papers deal exclusively with the hydrodynamics of an air-water system and the determination of gas-liquid-solid interfacial parameters in highly ionic solutions. In this paper, we present some experimental results on the hydrodynamics, pressure drop, liquid holdup, different flow patterns, gas-liquid interfacial areas and liquid-side mass transfer coefficients for organic non-viscous and viscous liquids and liquid-solid mass transfer coefficients with different packings: glass beads (dp = 1.16 × 10−3 m and 4 × 10−3 m), spherical catalyst (dp = 2.4 × 10−3 m) and glass Raschig rings (dp = 6.48 × 10−3 m). Comparison between our values and correlations in the literature will be discussed.