Countercurrent exchange

About: Countercurrent exchange is a research topic. Over the lifetime, 2255 publications have been published within this topic receiving 28687 citations. The topic is also known as: Countercurrent exchange.

Modelling of countercurrent partial condensers for light hydrocarbon streams containing hydrogen

Abstract: A general model is described for the condensation of gaseous mixtures containing a non-condensing species. The model is applied to the countercurrent partial condensation of light hydrocarbons (methane, ethylene, ethane and propylene) in the presence of hydrogen. Calculations are performed to study the effect of H 2 upon the equilibrium constants of the other components, and also, to determine the extent to which the physical solubility of H 2 may affect the process. The simulations also demonstrate the sensitivity of the system to certain operating and geometric parameters and show the relative importance of these parameters.

Theory of Gravity Separation of Particles from Liquid in Cocurrent and Countercurrent Thin-Layer Settlers

Abstract: The mechanism of gravity separation of particles from the laminar flow of a liquid in a flat channel is studied. This mechanism takes into consideration the particle size distribution, the flow velocity field, and also the conditions for equilibrium of single particles and their structural formations (a layer of particles or noncoalescing drops) on the channel walls.

Air fractionation process and installation with mixing column and krypton-xenon recovery

Abstract: A process and apparatus for low-temperature fractionation of air in a distillation column system for nitrogen-oxygen separation (5, 6) introduces into first feed air stream (4) into a distillation column system for nitrogen-oxygen separation. An oxygen-rich fraction (22) from the distillation column system for nitrogen-oxygen separation is pressurized (23) in liquid form and is added (25) to a mixing column (26). A heat transfer medium stream is introduced into the lower region of the mixing column (26) and is brought into countercurrent contact with the oxygen-rich fraction (22, 25). Gaseous top product (260) from the upper region of the mixing column (26) is introduced into an additional column (27). A liquid (38, 39, 40, 41) from the lower or middle region of the mixing column is introduced into the distillation column system. A krypton- and xenon-containing oxygen stream (44, 46, 47, 48) from the distillation column system is introduced into a krypton-xenon enriching column (36) from which a krypton- and xenon-enriched fraction (51) is obtained. A krypton- and xenon-depleted top fraction (28) is obtained from the upper region of the additional column (27).