Author: Peter S. FedkiwPublisher:
ISBN:
Category :
Languages : en
Pages : 524
Book Description
Mass Transfer Controlled Reactions in Packed Beds at Low Reynolds Numbers
Author: Peter S. FedkiwMass Transfer Controlled Reactions in Packed Beds at Low Reynolds Numbers
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The a priori prediction and correlation of mass-transfer rates in transport limited, packed-bed reactors at low Reynolds numbers is examined. The solutions to the governing equations for a flow-through porous electrode reactor indicate that these devices must operate at a low space velocity to suppress a large ohmic potential drop. Packed-bed data for the mass-transfer rate at such low Reynolds numbers were examined and found to be sparse, especially in liquid systems. Prior models to simulate the solid-void structure in a bed are reviewed. Here the bed was envisioned as an array of sinusoidal periodically constricted tubes (PCT). Use of this model has not appeared in the literature. The velocity field in such a tube should be a good approximation to the converging-diverging character of the velocity field in an actual bed. The creeping flow velocity profiles were calculated. These results were used in the convective-diffusion equation to find mass transfer rates at high Peclet number for both deep and shallow beds, for low Peclet numbers in a deep bed. All calculations assumed that the reactant concentration at the tube surface is zero. Mass-transfer data were experimentally taken in a transport controlled, flow-through porous electrode to test the theoretical calculations and to provide data resently unavailable for deeper beds. It was found that the sinusoidal PCT model could not fit the data of this work or that available in the literature. However, all data could be adequately described by a model which incorporates a channelingeffect. The bed was successfully modeled as an array of dual sized straight tubes.
Mass Transfer Coefficient in Packed Bed at Low Reynolds Number
Author: Harry Hung-Kwan YipPhysical Model for Mass Transfer in a Packed Bed
Author: Raymond Leon PorterPublisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 320
Book Description
Mass Transfer in a Packed Bed of Spherical Benzoic Acid Pellets at Low Reynolds Numbers and Short Bed Lengths
Author: Edwin John WilsonPublisher:
ISBN:
Category : Mass transfer
Languages : en
Pages : 160
Book Description
A New Correlation for Mass Transfer in the Flow of Gases Through Packed Beds and for the Psychrometric Ratio
Author: Edward J. LynchPublisher:
ISBN:
Category : Hygrometry
Languages : en
Pages : 48
Book Description
Liquid-phase Mass Transfer at Low Flow Rates in a Packed Column
Author: John Earnest FrandoligPublisher:
ISBN:
Category : Mass transfer
Languages : en
Pages : 132
Book Description
Author: Reuven Dobry
Author: Abbesghol Bakhtiar
Author: