Using S-statistic for investigating the effect of temperature on hydrodynamics of gas–solid fluidization

The influence of temperature on fluidization was investigated by a statistical chaotic attractor comparison test known as S-statistic. After calibration of the variables used in this method, the S-test was applied to the radioactive particle tracking (RPT) data obtained from a lab-scale fluidized bed. Experiments were performed with sand as fluidized particles and in temperatures from ambient up to 600 °C with superficial gas velocities of 0.29, 0.38 and 0.52 m/s. Considering the behavior of bubbles and comparing with frequency domain analysis, it was concluded that S-statistic is a reliable method for characterization of fluidization process behavior at different temperatures.

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► Experiments were carried out on a fluidized bed at various temperatures.
► S-statistic was used to study fluidization hydrodynamics based on RPT particle position data.
► PSD analysis was used to identify the structure contributions in the bed.
► Results showed that the hydrodynamics of bed changed at the temperature of 300 °C.