University Of North Carolina At Greensboro Operations And Supply Chain Management Assignment Help - Isooctane is produced

Question - Isooctane is produced in the reaction of isobutene and butylene in an emulsion with concentrated
sulfuric acid: i-C4H10 + C4H8 ? i-C8H18 The fresh feed to the process flows at a rate of 60,000 kg/h
and contains 25.0 mole% isobutene. 25.0% butylene, and 50.0% n-butane, which is chemically inert
in this process. The fresh feed combines with three separate recycle streams, as shown in the
flowchart, and the combined stream enters the reactor. Essentially all of the butylene fed to the
reactor is consumed. A portion of the reactor effluent is recycled to the reactor inlet and the remainder
passes to a decanter, in which the aqueous (sulfuric acid) and hydrocarbon phases are allowed to
separate. The acid is recycled to the reactor, and th ...Read More e hydrocarbons pass to a distillation column. The
overhead from the column contains isooctane and n-butane, and the bottoms product, which is
recycled to the reactor, contains only isobutene. The stream entering the reactor contains 200 moles
of isobutene per mole of butylene and 2 kg of 91 wt% H2SO4 (aq) per kg of hydrocarbon. The stream
obtained by combining the fresh feed and isobutene recycle contains 5.0 moles of isobutene per mole
of butylene. You wish to determine the molar flow rates (k mol/h) of each component of the fresh feed,
the product stream, and the emulsion, isobutene and acid recycle streams.
(a) Draw and completely label a flowchart of the process perform degree-of-freedom analyses on the
overall process and sub processes and write the equations you would use to determine the required
flow rates. (Suggestion: Begin by calculating the total molar flow rate of the fresh feed stream.)
(b) Perform the calculations.
(c) List the assumptions in this problem that are not likely to be fully satisfied in practice. ...Read Less

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