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Measured (full symbols) and calculated (empty symbols) pressure drop over the bed for HDPE (ρ s = 950 kg/m3) with d p = 1 mm (⋄); 1.5 mm (○); 2 mm (Δ) and for PC (ρ s = 1240 kg/m3) with d p = 2 mm (□).
Solids capacity: 4 kg. Error bars represent the standard deviation between three repeated experiments. A gas injection velocity change indicates a change of gas flow rate, given that the slot thickness is constant in all experiments.
