The device and methodology developed allow reliably measuring the circulation rate of fine particles in conical spouted beds. The trends observed show that an increase in contactor angle, height of the static bed and width of the faces of the draft tube lead to an increase in the average and maximum cycle times. Nevertheless, as the draft tube diameter, gas inlet diameter and height of the entrainment zone are greater the average and maximum cycle times are shorter. Solids circulation rates follow similar trends when using either open-sided or nonporous tubes, but the regime is much more vigorous with the open-sided tubes.
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