Question: The absorption operation of Examples 6.1 and 6.4 is being scaled up by a factor of 15, such that a column with an 11.5-ft diameter

The absorption operation of Examples 6.1 and 6.4 is being scaled up by a factor of 15, such that a column with an 11.5-ft diameter will be needed. In addition, because of the low efficiency of 30% for the original operation, a new tray design has been developed and tested in an Oldershaw-type column. The resulting Murphree vapor-point efficiency, Eov, for the new tray design for the system of interest is estimated to be 55%. Estimate EMV and Eo. (To estimate the length of the liquid flow path, ZL, use Figure. Also, assume that u/DE = 6ft-1.)

Tray Tray j+ 1 (a) Region of unsatisfactory operation 2000 4000 6000 Liquid flow rate, gal/min (b) Column diameter, feet

Tray Tray j+ 1 (a) Region of unsatisfactory operation 2000 4000 6000 Liquid flow rate, gal/min (b) Column diameter, feet, DT Single-pass Two-pass Three-pass Four-pass

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