A C = interfacial area per volume of transfer device, sq. = interfacial transfer area, sq. ft. = solute concentration in liquid, lb./cu. ft.; Ci, at the interface; Cs, in equilibrium with bulk gas phase; Co, at time zero; Ci, upstream from the device and uniform tank concentration; CZ, downstream; (C' refers to parts per million = C x H = Henry's law constant for the same concentration units in gas and liquid phases, dimensionless kL,kc, = liquid and gas film transfer coefficients, ft./min. KL = overall liquid transfer coefficient, ft./min. m = slope of the line resulting from a plot of Equation AP = pressure drop across device, in. Hg r = rate of transfer, Ib. mass of solute/min. V = liquid volume in system, cu. ft. w = liquid flow rate, Ib. mass/min.8 = time, min. p = liquid density, Ib. mass/cu. ft.ft./cu. ft.
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