Internal mass transfer in hollow fiber supported liquid membranes

Journal Article · Mon Mar 01 00:00:00 EST 1993 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690390316· OSTI ID:6497071

Urtiaga, A M; Irabien, J A ^[1]

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1. Univ. de Cantabria, Santander (Spain)

The study of mass transfer in hollow fiber supported liquid membranes is justified by a large number of separation processes. The analysis starts from the definition of an overall permeability coefficient which is a lumped parameter of a particular system and process conditions which gathers both mass transfer and operation parameters. By applying the film theory the contribution of the interfacial mass-transfer coefficient due to the inner boundary layer and the contribution of the supported liquid membrane permeability coefficient can be separated and analyzed. The study yields overall permeability coefficients that can be compared with those expected from hollow fiber design equations suggested earlier. The second approach considers the continuity mass conservation equation and the associated boundary conditions for the solute in the inner fluid. The analysis by means of the fundamental equations separates the effects of the operation variables such as the hydrodynamic conditions and length and diameter of the fibers from the mass-transfer properties of the system, described by the wall Sherwood number. The scope of the present work is to compare both methods of describing a hollow fiber supported liquid membrane module, analyzing the influence of the internal mass transfer on the design of such systems. In the experimental system under consideration, the simultaneous separation-concentration of phenol from aqueous solutions with hollow fiber supported liquid membrane modules is performed. The influence of the flow rate of the inner aqueous phase on the phenol separation rate has been studied.

• OSTI ID: 6497071
• Journal Information: AIChE Journal (American Institute of Chemical Engineers); (United States), Vol. 39:3; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
54 ENVIRONMENTAL SCIENCES
PHENOL
MEMBRANE TRANSPORT
SUPPORTED LIQUID MEMBRANES
MASS TRANSFER
BOUNDARY LAYERS
COMPARATIVE EVALUATIONS
DESIGN
FIBERS
FLOW RATE
INTERFACES
MATHEMATICAL MODELS
PERMEABILITY
SEPARATION PROCESSES
AROMATICS
EVALUATION
HYDROXY COMPOUNDS
LAYERS
MEMBRANES
ORGANIC COMPOUNDS
PHENOLS
320303* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)