Bibliothèque de L'IMIST/CNRST

Surveyed in this book are the kinetics of non-linear mass transfer and its effects on hydrodynamic stability in systems with intensive interphase mass transfer, in electrochemical systems with high current density and in chemically reacting systems. In Part 1 the non-linear mass transfer as a result of an intensive interphase mass transfer in the gas (liquid)-solid surface, gas-liquid and liquid-liquid systems is considered in the duffusion boundary layer approximation as well as in flat channel taking the longitudinal diffusion into account. The influence of the direction of the intensive interphase mass transfer on heat transfer and multi-component mass transfer is illustrated. Part 2 discusses non-linear mass transfer in electrochemical systems with high current density using the examples of the anode dissolving of metals in the electrolyte flow and the electro-separation of metals out of concentrated solutions. The theory of the measured electrochemical treatment of metals and alloys, which is a method of wide practical use, has been elaborated on this basis. In Part 3 the non-linear mass transfer in chemically reacting systems is considered in the cases of: non-linearity of the equations of the chemical reaction's kinetics and intensive interphase mass transfer or thermo-capillary effect due to chemical reactions. On this basis, the mechanisms and the macro-kinetics of the chemical transformations in the gas-liquid systems are discussed. Part 4 is dedicated to the chemical reaction kinetics in stationary two phase systems at an arbitrary contact time between phases. In Part 5 the effects of concentration gradients are considered in the approximations of the linear theory of the hydrodynamic stability of almost parallel flows. In systems with intensive interphase mass transfer, the Marangoni effect could also be observed, beside the effect of non-linear mass transfer. A comparative analysis of both effects is made in this book.

Preface. Introduction. Linear Mass transfer Theory. Model theories. Boundary layer theory. Immobile phase boundary. Moving phase boundary. Counter-current flow. References. -- PART 1: Systems with Intensive Interphase Mass Transfer. -- Specifics of the Hydrodynamic Conditions of the Intensive Interphase Mass Transfer. Gas (Liquid)-Solid System. Gas-Liquid and Liquid-Liquid Systems. Gas-Falling Liquid Film-Solid Surface System. Effects of Concentration and Temperature on the Non-Linear Mass Transfer. References. -- PART 2: Electrochemical Systems with High Intensity Electric Currents. -- Fundamentals of the Kinetic Theory of Transport of Mass and Charge in Electric Systems. Anodic Metal Dissolution in an Electrolyte Flow. Electrochemical Recovery of Metals from Concentrated Solutions. Effect of the Non-Isothermal Conditions and the Gas Evolution. -- PART 3: Chemically Reacting Gas-Liquid Systems. -- Interphase Mass Transfer Mechanism. Macrokinetics of the Chemical Transformations. Effects of the Physical Parameters. -- PART 4: Non-stationary Interphase Mass Transfer with Chemical Reactions. -- Non-Stationary Physical Absorption. Non-Stationary Two-Phase Absorption Complicated with First Order Chemical Reaction. Non-Stationary Absorption with Second Order Chemical Reaction. -- PART 5: Hydrodynamic Stability in Systems with Intensive Interphase Mass Transfer. -- Stability Theory. Hydrodynamic Stability. Orr-Sommerfeld Equation. Linear Stability and Non-Linear Mass Transfer. Mechanism and Kinetics of the Transport Processes in Systems with Intensive Interphase Mass Transfer. References. Index.

Includes bibliographical references and index.

Description based on print version record.