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.
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.
Write the reaction for the dehydrogenation of propane as follows:
represent the above equation as
The above reaction takes place in a reactor. The products formed are sent into a distillation column. The components are separated into a distillate and bottom product in which the bottom product is recycled to the reactor and the distillate is sent into a second distillation column where all the hydrogen
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