| Summary: | 碩士 === 淡江大學 === 化學工程與材料工程學系碩士班 === 99 === The expressions of heat- and mass-transfer rates in the multipass heat- and mass-exchangers derived by the conventional correction-factor analysis are implicit and the results should be calculated by using try-and-error method. In the present study, a modified correction-factor analysis was introduced, and the expressions of mass-transfer rate and modified correction-factor charts for membrane extraction in parallel-flow multipass rectangular devices are explicit. The results can be readily calculated without using try-and-error method. The correction factors for multipass operations are plotted in the modified correction-factor charts, they are function of flow rate, mass-transfer-area, distribution coefficient and overall mass-transfer coefficient. Experimental results confirm the predicted values for the extraction of acetic acid from aqueous solution by methyl isobutyl ketone in the double-pass device.
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