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Separations Quiz Screencasts

Choose from the list of screencasts below. Each screencast has at least one interactive quiz during the video. The description above each video provides a brief summary.

Description: Presents the material balances, energy balance, and Raoult’s law for an adiabatic flash drum. The feed is an ideal binary liquid.

Description: The changes in temperature and composition of the vapor are plotted versus time for batch distillation of a binary liquid that has an azeotrope.

Description: This screencast describes a flash distillation, derives the material balances and operating line, and shows how to use the operating line on an x-y diagram.

Description: Demonstrates how mass balances and an equilibrium equation are used to count stages graphically on a y versus x diagram (gas-phase solute concentration versus liquid-phase solute concentration) for a stripping column.

Description: Shows how the mixing point and the operating point in the Hunter-Nash method are determined from mass balances on a two-stage liquid-liquid extraction. The points are located on a ternary phase diagram.

Description: Shows how mass balances and phase equilibrium are used to determine the number of stages in the Hunter-Nash method for liquid-liquid extraction.

Description: Uses an interactive simulation to describe the impact of the state of the feed to a distillation column on the liquid and vapor flow rates in the column.

Description: Describes an absorption column, demonstrates mass balances, and shows how to calculate the number of equilibrium stages.

Description: Describes a stripping column, demonstrates mass balances, and shows how to calculate the number of equilibrium stages.

Description: A brief introduction to multi-stage batch distillation for a binary mixture. Other screencasts describe the analysis of multi-stage batch distillation.

Description: Derives mass balances and Rayleigh equation for single-stage batch distillation.

Description: Demonstrates conceptually how to step off stages on a McCabe-Thiele diagram.

Description: Uses an interactive simulation that shows the operation of an absorption column that is used to transfer a solute from a gas phase to a liquid phase.

Description: Develops a ternary phase diagram using equilibrium data.

Description: Shows how to use mass balances to draw a q-line on a y-x phase diagram for a n-hexane/n-octane mixture. The q-line determines the equilibrium compositions during a flash separations.

Description: Describes how the driving force for reverse osmosis decreases due to concentration polarization and the increase in solute concentration due to solvent permeation.

Description: Describes reverse osmosis, which uses a membrane that is permeable to water, to purify water.

Description: Explains the energy balance for a single-effect evaporator, which is used to increase the concentration of a solute in a feed stream by evaporating some of the liquid in the feed. A feed stream of saturated steam supplies heat to evaporate the liquid.

Description: Describes the operation of a single-effect evaporator that is used to concentrate a solution.

Description: Describes how a triple-effect evaporator with backward feed concentrates a dilute solution.

Description: Describes the operation of a triple-effect evaporator to concentrate a solute liquid solution using significantly less energy than a single-effect evaporator.

Description: A brief overview of using a triangular phase diagram for a tertiary system (acetone-water-MIBK).