Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9623701 | Chemical Engineering Journal | 2005 | 7 Pages |
Abstract
In this research work, hydrodynamic characteristics and gas-liquid mass transfer in a laboratory scale inverse turbulent bed reactor were studied. In order to characterize internal flow in the reactor, the residence time distribution (RTD) was obtained by the stimulus-response technique using potassium chloride as a tracer. Different solid hold-up (0-0.37) and air superficial velocity (2.7-6.5 mm sâ1) values were assayed in RTD experiments. The parameters that characterize the RTD curve, mean residence time and variance were independent of the solid hold-up, thus the solid particle concentration did not influence liquid mixing in the reactor. The hydrodynamic of the inverse turbulent bed was well represented by a model that considers the reactor as two-mixed tank of different volumes in series. The value of the volumetric gas-liquid mass transfer coefficient (kLa) was independent of the solid hold-up. This result enhances a previously suggested hypothesis, which considers that the solid and liquid form a pseudo-fluid in the inverse turbulent bed reactor.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Omar Sánchez, Sébastien Michaud, Renaud Escudié, Jean-Philippe Delgenès, Nicolas Bernet,