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Fig. 3.2 Comparison of bed expansion factor as a function of inlet gas velocity using different drag models with experimental data (This figure was originally published in Powder Technol 288, 2016 and has been reused with permission)
Case Inlet gas velocity (m/s) Solid circulation rate (g/s) Baseline 0.15 44 Case 1 0.15 220 Case 2 0.15 440 Case 3 0.1125 220 Case 4 0.0975 220
To study the effect of the solid circulation rate, the inlet solid mass flow rate was increased by factors of 5 and 10, while the inlet gas velocity was kept constant at the baseline value.
Furthermore, at the inlet solid mass flow rate of 220 g/s (Case 1), the inlet gas velocity was decreased by 25 % and 35 % (Case 3 and Case 4, respectively) to investigate the effect of gas residence time on CO2 removal.
The effect of gas residence time was studied by changing the inlet gas velocity and keeping the solid circulation rate constant at 220 g/s.
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