Abstract
Abstract Experiments were conducted to investigate fluidization fundamentals of coarse particle using nitrogen as the fluidizing gas at high pressure. The particle under study was falling in Geldart’s group B/D. A 60-mm-dia. cylindrical Perspex model, a two-dimensional jetting fluidized bed, a 200-mm-semicircular jetting fluidized bed and a 200-mm-dia. cylindrical bed were used in the experiments. The fundamentals of high pressure fluidization examined in this study include minimum fluidization velocity and bed expansion. Empirical correlations were developed for determining minimum fluidization velocity and bed expansion. With the same excess fluidizing-gas velocity, bed expansion generally increases with the operating pressure, but the influence of pressure on bed expansion becomes weaker at higher pressure.
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