E5.3 - Suitability of ECT for Non-invasive Temperature Monitoring in Fixed-bed Reactors

Abstract

We characterize the temperature-dependent effective permittivities of two-phase materials (glass beads, hydrogenation catalyst) by means of electrical impedance measurements in a temperature range from about 25 °C to 240 °C. Measurements with the same materials using a commercial electrical capacitance tomography (ECT) system are carried out while the temperature of the fixed bed is changed. The images show that the measurement method is able to detect temperature gradients in a fixed bed, even though further efforts are needed to improve the quality of the results.