Propylene is produced by the dehydrogenation of propane. The product stream leaving a
dehydrogenation reactor is found to contain 900 mol/s propane, 99.75 mol/s propylene, and
95 mol/s of H2. This stream is passed to a distillation column, with the distillate containing
all of H2, most of propylene, and 0.555% of the molar flow rate of the propane that enters the
column. The bottoms from the column, which is recycled back to the reactor, has a
propylene molar flow rate equal to 5% of that in the distillate. The distillate is then passed to
a second distillation column in which all of the H2 is recovered in the distillate and all of the
organics (propane and propylene) are recovered in the bottoms. 

a) Construct a process flow diagram for this system.

b) Perform a degree of freedom analysis for the system containing the two distillation
columns (you do not need to worry about the dehydrogenation reactor). 

c) Evaluate the molar flow rates for all streams assuming that the process operates at steady-
state.

Transcribed Image Text:

Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales for Item GY9 are as follows: Mar. 1 8 Inventory Sale 305 units 510 units at $26 27 Sale 325 units Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, determine (a) the cost of merchandise sold on March 27 and (b) the inventory on March 31. a. Cost of merchandise sold on March 27 b. Inventory on March 31 15 365 units at $24 Purchase $ $ Perpetual Inventory Using LIFO Beginning inventory, purchases, and sales for Item GY9 are as follows: Mar. 1 8 Inventory Sale 305 units 510 units at $26 27 Sale 325 units Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, determine (a) the cost of merchandise sold on March 27 and (b) the inventory on March 31. a. Cost of merchandise sold on March 27 b. Inventory on March 31 15 365 units at $24 Purchase $ $