Case questions for registered chemical engineers
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I would like to ask the experts: A 6% (wt%, the same hereafter) ethanol solution with a flow rate of 10,000 kg/h is fed into a distillation tower; a 95% ethanol solution is obtained at the top of the tower, while wastewater containing 0.1% ethanol is obtained at the bottom. What is the flow rate of the product at the bottom of the tower (kg/h), among the following values? A 937.8 B 10720 C 8372 D 1072. My calculation gives 10470 kg/h.
Based on the material balance for ethanol, my calculation gives 10470
How is it possible that the amount at the bottom of the tower is more than the feed volume? My calculation shows 9378.3 kg/hr
9947KG/H -- at the bottom of the tower; 52.6KG/H at the top of the tower
This post was last edited by wwwei on 2021-9-28 at 11:16. The answer for option A in this question is incorrect; it should be 9378