Operating diagram cocurrent operation

COCURRENT FLOW OPERATION. When the chemical reaction is essentially irreversible and the equilibrium partial pressure of the solute is zero, the number of transfer units for a given separation is the same for countercurrent operation or for cocurrent flow of liquid and gas. Figure 22.24 shows typical operating lines for both cases. In this diagram x is the total solute absorbed and reacted and not the amount of solute present in the original form. For cocurrent operation with the feeds at the top, the gas leaving at the bottom is exposed to rich liquid, which has absorbed a lot of solute, but if jf = 0, the driving force is just y, and Noy is calculated from Eq. (22.50), as for countercurrent flow. 

This is the equation of a straight line on the XY diagram through the points (Xp Tj) and (X2, Y2) with slope - LJVS, the operating line for cocurrent operation. Figures... 

Figure 11.5.e-II Operating diagrams for various types of ammonia synthesis reactors, (a) Multitubular reactor with cocurrent flow, (b) Multitubular reactor with countercurrent flow, (c) Multibed adiabatic reactor (from Fodor [122]). 

Fig. 1-48. Loading diagram for a steady-state cocurrent mass transfer operation from phase I to phase II.

FIGURE 15.16 Operating diagram for two-stage cocurrent sorber. 

Figure 9.6 Schematic diagram and scheduling chronogram of elementary steps comprising the cyclic operation of hybrid scheme A. The notation is as follows PR, pressurization HP A, high-pressure adsorption CD, cocurrent blowdown BD, counter-current blowdown PG, low-pressure purge. The product from the HPA step is enriched in the less adsorbed species (A). Gray area of chronogram identifies periods during which the membrane is working as an empty tube. Reprinted with permission from Ref. 41.

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