Local and globalmeasurements in trickle bed reactor, Part 2: Void fraction and filmthickness

Author(s): Shripad T.Revanka,XiangchengKong

In this paper two phase air water flow parameters in trickle bed reactors were measured using impedance void meter and film thickness probes to characterize the two phase flow behaviour and structure both at bed level and at pore level. The data on the gas phase void fraction, liquid hold up and pulse velocity were obtained for various flow rates of gas and liquid. The signals for the impedance meter and the film thickness probe provided the wave nature of liquid film and its impact on the void fraction and liquid holdup in the bed. Analysis of the data in terms of FFT and PDF provided signature of flow regimes and characteristics of pulses in pulse flowregime.

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