Cycling zone adsorption

Figure 17.38. A two-bed cycling zone adsorption unit (a) Direct heating mode (b) Recuperative heating mode...

Figure 17.39. Direct mode cycling zone adsorption (a) Progression of concentration bands through a two-bed...

Further discussions of pressure swing adsorption, parametric pumping and cycling-zone adsorption have been presented by Yang 3-1, Schweitzer 7 1 and Wankat(58). 

Wankat, P. C. Cyclic Separations—Parametric Pumping, Pressure Swing Adsorption and Cycling Zone Adsorption (A.I.Ch.E. Modular Instmction Series, Module B6.ll, 1986). 

Cyclic adsorption processes such as parametric pumping, cycling zone adsorption and heatless adsorption have received much attention both theoretically and experimentally in the past several years (3j. Skarstrom (4J has reviewed applications of heatless adsorption (synonymous with pressure swing adsorption) to air drying, hydrogen purification and air fractionation. 

Wankat, P. C. Dore, J. C., Multicomponent Cycling Zone Adsorption, Chemical Engineering Science, 1976, 31, 921-927. 

Thermal Mode Cycling Zone Adsorption. Ind. Eng. Chem. Fundam., 19, 86 (1980). 

Figure 7.1.20. Cycling zone adsorption, (a) Direct mode of operation with heat supplied/removed directly into the bed throu the wall, (b) Recuperative mode of operation with heat supplied or removed directly into the feed, (c) Temperature variation with time at two distances from feed inlet (After Knaebel andPigford (1983).) (d)NaCl concentration of feed outlet as a function of time. (After Knaebel...

A variety of systems have been investigated using the cycling zone adsorption technique. See Wankat et al. (1975) and Knaebel and Pigford (1983) for a list of useful references. Figures 7.1.20(c) and (d) illustrate schematically the recuperative mode of cycling of temperature in a bed... 

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