Electrochemical characterization of packed beds by impedance spectroscopy measurements
ABSTRACT: The work describes preliminary studies for the application of impedance spectroscopy for the determination of the packed bed conductivity. Electrical conductivity of a packed bed varies with the mobility and affinity of ions with which solid particles are in contact. For very low specific conductivity of the liquid phase, the specific conductivity of the packed bed is enhanced by the presence of solid particles. In contrast, when liquid phase conductivity is high, their contribution to electrical transport becomes more significant.