Parametric pumping batch operation

Figure 17.34. Parametric pumping, batch operation (a) Direct thermal mode (b) Recuperative thermal mode...

Figure 19.12. Batch parametric processing of solid-liquid interactions such as adsorption or ion exchange. The bottom reservoir and the bed interstices are filled with the initial concentration before pumping is started, (a) Arrangement of adsorbent bed and upper and lower reservoirs for batch separation, (b) Synchronization of temperature levels and directions of flow (positive upward), (c) Experimental separation of a toluene and n-hcptane liquid mixture with silica gel adsorbent using a batch parametric pump. (Reprinted from Wilhelm, 1968, with permission of the American Chemical Society), (d) Effect of cycle time t on reservoir concentrations of a closed system for an NaCl-H20 solution with an ion retardation resin adsorbent. The column is initially at equilibrium with 0.05M NaCl at 25°C and a = 0.8. The system operates at 5° and 55°C. [Sweed and Gregory, AIChE J. 17, 171 (1971)J.

Batch parametric pumping in a closed system was studied in the context of an equilibrium nondispersive model in Section 7.1.4.1. Continuous open parametric pumps have been modeled by a number of investigators (Gregory and Sweed, 1970 Chen and Hill, 1971). A number of experimental systems have been studied. These include pH based operations (Sabadell and Sweed, 1970 Chen et al, 1979, 1980) and pressure based gas separation operations (Keller and Kuo, 1982). 

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