The block diagram given below shows the recovery of acetone in waste gas. The compositions in the streams in the figure are given by weight. Pure water (W) Clean air (A) 99.5% air 0.5% water Distillation overhead product (D) 99% acetone 1% water Absorption column Distillation column 1400 kg/h Feed (F) 95% air 3% acetone 2% water Absorption bottom product (P) 19% acetone 81% water Distillation bottom product (B) 4% acetone 96% water a) How many systems can you select on this process to solve the problem? Show the boundaries of each system you proposed on the figure. (5 pts) b) Show that the problem is well-defined by performing degree-of-freedom analysis for each system. (15 pts) c) Calculate all unknowns. (25 pts) d) Prove your calculation is correct by performing overall mass balance. (5 pts) e) What is the recovery percentage of acetone in this process?

The block diagram given below shows the recovery of acetone in waste gas. The compositions in the streams in the figure are given by weight. Pure water (W) Clean air (A) 99.5% air 0.5% water Distillation overhead product (D) 99% acetone 1% water Absorption column Distillation column 1400 kg/h Feed (F) 95% air 3% acetone 2% water Absorption bottom product (P) 19% acetone 81% water Distillation bottom product (B) 4% acetone 96% water a) How many systems can you select on this process to solve the problem? Show the boundaries of each system you proposed on the figure. (5 pts) b) Show that the problem is well-defined by performing degree-of-freedom analysis for each system. (15 pts) c) Calculate all unknowns. (25 pts) d) Prove your calculation is correct by performing overall mass balance. (5 pts) e) What is the recovery percentage of acetone in this process? (5 pts)