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- W2051570290 abstract "The residence time distribution of solids in an 18-l pilot scale three-phase annular reactor has been obtained as a function of gas and liquid flow rates in order to characterize the influence of fluid dynamics on solids mixing. Both co-current and countercurrent operations were investigated. Gas velocity in the range 0.05–0.5cms−1 was employed, while the liquid velocity was varied between 0.03 and 0.13cms−1. Commercial titania powder was used as a tracer. The RTD curves for the co-current operation showed a bimodal behavior whose peaks decreased with decreasing gas flow rate. As a result, the solid flow dynamics was modeled by a series of CSTRs in parallel with a plug flow reactor. The model also admitted interphase solid transport between the wake and bulk liquid phase and yielded predictions with a mean squared error between 3% and 6%. The RTD behavior for countercurrent operation was, however, unimodal and therefore modeled as a series of stirred tanks with a recycle stream. The associated mean squared error was in the range 1–4%. Although fluid flow rates were held constant during tracer experiments, there seemed to be an evolution of solids flow pattern within the reactor as evidenced by the time-dependency of the intensity function, λ." @default.
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- W2051570290 date "2001-11-01" @default.
- W2051570290 modified "2023-09-26" @default.
- W2051570290 title "Particle residence time distribution (RTD) in three-phase annular bubble column reactor" @default.
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- W2051570290 doi "https://doi.org/10.1016/s0009-2509(01)00270-6" @default.
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