Minia University Faculty of Engineering Chemical Engineering Department

Contents n Mass Transfer Coefficient Correlations for: 1. Outside Solid Surfaces; 2. Inside Pipes

Mass Transfer Coefficient Correlations n In this section various correlations that are used to

1. Mass Transfer Coefficients for Flow Outside Solid Surfaces: a) Mass Transfer for Flow

Correlations 1) Laminar Flow L = Length of plate in the direction of flow.

b) Mass Transfer for Flow Past Single Spheres: 1) For Gases 2) For Liquids

2. Mass Transfer Coefficient Correlations for Inside Pipes: a) Mass Transfer Coefficient for Laminar

b) Mass Transfer Coefficient for Turbulent Flow Inside Pipe: 1) Gilliland – Sherwood (1934):

3. Mass Transfer Coefficient Correlations for Fixed Beds: 1) Wilson – Geankoplis Correlations (1966):

2) Wakao – Funazkri Correlation (1978): For Liquids and Gases/Solids a) Range: 3) Ranz

4. Mass Transfer Coefficient Correlations for Fluidized Beds: Fan et al. (1960) Correlation: For

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Minia University Faculty of Engineering Chemical Engineering Department Course Title: Mass Transfer Course Code: CHE 313 Third Year Course Coordinator: P r o f. D r. M o h a m m a d S h a w k y Lecture No. 12 ESTIMATION OF MASS TRANSFER COEFFICIENT

Contents n Mass Transfer Coefficient Correlations for: 1. Outside Solid Surfaces; 2. Inside Pipes 3. Fixed Bed 4. Fluidized Bed

Mass Transfer Coefficient Correlations n In this section various correlations that are used to estimate the convective mass transfer coefficients for various cases are presented.

1. Mass Transfer Coefficients for Flow Outside Solid Surfaces: a) Mass Transfer for Flow Parallel to Flat Plates: 1) Volatile Solid Air n n Naphthalene Benzoic Acid 2) Volatile Liquid n TCE Solvent H 2 O solid L

Correlations 1) Laminar Flow L = Length of plate in the direction of flow. 2) Turbulent Flow

b) Mass Transfer for Flow Past Single Spheres: 1) For Gases 2) For Liquids

2. Mass Transfer Coefficient Correlations for Inside Pipes: a) Mass Transfer Coefficient for Laminar Flow Inside Pipe: 1) Experimental Method Wetted-Wall towers are one of the simplest pieces of equipment used for the determination of M. T. coefficient 2) Estimation Method Schematic representation of a wetted-wall column

3) Graphical Method n

b) Mass Transfer Coefficient for Turbulent Flow Inside Pipe: 1) Gilliland – Sherwood (1934): 2) Linton – Sherwood (1950): Studied the vaporization of different liquids Carried out investigations by dissolution of into Air and provided the following sparingly soluble solids such as benzoic correlation for the gas phase mass transfer acid into water coefficient.

3. Mass Transfer Coefficient Correlations for Fixed Beds: 1) Wilson – Geankoplis Correlations (1966): For Liquid/Solid a) Range: n

b) Range: n

2) Wakao – Funazkri Correlation (1978): For Liquids and Gases/Solids a) Range: 3) Ranz – Marshal Correlation (1952): Applications: Adsorption of gases and liquids

4. Mass Transfer Coefficient Correlations for Fluidized Beds: Fan et al. (1960) Correlation: For Liquid

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