Parametric Pumping and Cycling Zone Adsorption

Abstract

Sir: Although as Harris suggests, the cause of the separation in parametric pumping is the ability to drive solute to and from the solid by changing the system temperature, the novel contribution of the inventors is the use of recycle in a periodic operation. Baker (1969) showed that when a singlecolumn parametric pump is operated without returning any effluent to the column-i.e., no recycle-the maximum separation, even in a column having an infinite number of theoretical plates (operating under the local equilibrium condition) will be

Modeling of Nonequilibrium Effects in Parametric Pumping

“…Pigford, Aris (1969) treated a batch system while Gregory and Sweed (1970), Chen and Hill (1971) and Chen, et al (1972), applied the theory to continuous systems. Baker (1970), Harris (1970), and Sweed (1970) have discussed the merits of the theory.…”