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Title: Prediction of the Height of the Lean-Bed Zone in Gas-Solid Semifluidized Beds
Authors: Murthy, J S N
Narayana, A S
Roy, G K
Sarma, K J R
Issue Date: Dec-1981
Citation: Indian Chemical Engineer ,Vol. XXIII, No. 4, Pages 26—28
Abstract: It has been observed by many investigators that a lean-bed zone exists in between fluidized beds and packed beds.No attempt has been made however to predict it. Data have been obtained on the heights of the lean-bed zone in semifluidized beds using air-glass beads, air-ilmenite and airchromite systems. Based on the lines of statistical design, the experiments were carried out at two levels. An equation is presented for predicting the heights of the lean-bed zone in terms of solid, fluid and bed properties. The equation has been, verified by carrying out additional independent experiments and has been found to hold good within ±15per cent.
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