solve q2

1. Distillation is used to recover material X from an aqueous waste stream. The aqueous waste stream of 240kg/min containing 15mol% of material X is distilled to give distillate purity of at least 92 mol\% X. The aqueous bottom product must not contain more than 2 mol\% X. The feed will be a saturated liquid. Reflux ratio =1.25. Estimate the following: a. The vapour flow rates (V and V) in the column. b. The liquid flow rates in the top (L) and the bottom sections ( L) of the column. c. If the feed is saturated vapour, explain how it affects vapour and liquid flow rates. Use the following data: Molecular weight of X=58kg/kmol Molecular weight of Water =18kg/kmol 2. For the same problem above, assuming feed is saturated liquid. a. Determine the column diameter (using standard size) and the plate specification (Column area, Net area, downcomer area, Active area, hole area and weir length). Use K 1 (corrected =1.15K1. b. Determine the liquid flow pattern