New Calibration Methods for Accurate Electrical Capacitance Tomography Measurements in Particulate-Fluid Systems

Abstract

Three different calibration techniques have been developed to greatly improve the accuracy of the solid holdup distributions obtained from electrical capacitance tomography (ECT) measurements. First, liquid mixtures are used to calibrate the ECT system. Second, the relative permittivity of solid particles is obtained by immersing the solids in different fluids: the solid relative permittivity corresponds to the point where the fluid relative permittivity matches the relative permittivity of the liquid-solid mixture. Third, the best relationship between solid holdup and electrical permittivity, over the required range of solid concentrations, is determined, for each particulate system, by suspending the particles in a viscous liquid honey.

Synthesis of various metal selenide nanostructures using the novel selenium precursor 1,5-bis(3-methylimidazole-2-selone)pentane

“…24 The polyol, such as EG and DEG, is a good solvent, and can easily dissolve a variety of polar inorganic materials owing to its high permittivity and boiling point. 25 In addition, we also chose PVP as surfactant, which shows strong coordination power with (M n+ ) to prevent metal selenide nanostructures from agglomeration and can also render the particles with water dispersibility. Structural information, morphology and other characterizations of the metal selenide sample will be described separately below.…”

Finite Element Analysis of Capacitance Sensor

“…For the capacitance sensor, in the center of the sensor detection field, namely the far away from the plate, due to potential changes is small, the grid subdivision is relatively sparse; And near the edge of the plate area, potential change is bigger [3], in part to the appropriate encryption. Here are several kinds of mesh and the comparison of sensitivity field distribution.…”