STUDY OF PULSING FLOW IN A TRICKLE-BED USING THE ELECTRODIFFUSION TECHNIQUE

An electrochemical technique is employed for measuring local, instanta neous liquid-solid mass transfer coefficients in downward cocurrent ga s-liquid flow through a packed bed under pulsing flow conditions. The technique involves specially designed electrodes of the same dimension s as the packing material. Also microelectrodes on the surface of a pa rticle are tested for flow diagnostics in the microscale. The feasibil ity of the method is examined. Interpretation of measurements from var ious electrodes provides information on the pattern of mass transfer a nd liquid distribution in the packing.