Chemical Engineering 401
Experiment 9
Ion Exchange
Purpose
The principles and physics of ion exchange chromatography is an example
of adsorption phenomena. This experimental station is designed to elucidate
the practical relation between the theory and experiment in an important
separation process.
Brief Description of the Station
There are two experimental units, batch and column adsorbers. The batch
adsorbers are stirred flasks with which one determines the sorption isotherms
and diffusion in the ion exchange resin. The second apparatus is a a column
packed with ion exchange resin through which flows the sorbate. Data taken
from this device may be used to determine intra- and extra-particle mass
transfer.
Typical Experiments
What is the effect of temperature on equilibrium sorption of Copper Sulfate from water solution ? Determine the sorption isotherms for ion exchange resins of two different sizes at at least three different temperatures. What are the batch sorption kinetics ? Can the intraparticle diffusion be measured ?
What is the effect of flow rate on the breakthrough of Copper Sulfate in a packed column adsorber ?
How does particle size affct the performance of an ion exchange column? How severe is axial dispersion on breakthrough ?
Can you obtain good correspondence between the adsorption model and the experimental measurements ?