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The feed is 6 0 mol % dimethyl ether ( DME ) and 4 0 mol % methanol. Assume that the equilibrium data provided are
The feed is mol dimethyl ether DME and mol methanol. Assume that the equilibrium data provided are correct. a A feed of kmolh is flashed at bar and deg C What are the liquid and vapor flowrates and the mole fractions in the vapor and liquid exit streams? A feed of kmolh is to be fractionated to give a distillate containing mol DME and a bottoms product containing mol methanol. The feed is vapor and liquid. There is a total condenser and a partial reboiler. b Determine the molar flowrates of the distillate and bottoms. c Calculate all internal flows for operation at a reflux ratio of d In order to use cooling water in the condenser, assume that the DME must condense no lower than deg C Estimate the top pressure for this column. e In order to use lowpressure steam in the reboiler, the bottom temperature must be no higher than deg C Estimate the bottom pressure for this column. f Assume that the tray efficiency is Estimate the maximum weir height for which trays can be designed to meet the pressure specifications. g Determine the diameter of a packed tower to operate at of flooding using in ceramic Berl saddles. Determine the diameter both above and below the feed.
The feed is mol dimethyl ether DME
and mol methanol. Assume that the equilibrium data
provided are correct.
a A feed of kmolh is flashed at bar and deg C What are
the liquid and vapor flowrates and the mole fractions in the vapor
and liquid exit streams?
A feed of kmolh is to be fractionated to give a distillate
containing mol DME and a bottoms product containing
mol methanol. The feed is vapor and liquid. There is
a total condenser and a partial reboiler.
b Determine the molar flowrates of the distillate and bottoms.
c Calculate all internal flows for operation at a reflux ratio of
d In order to use cooling water in the condenser, assume that
the DME must condense no lower than deg C Estimate the top
pressure for this column.
e In order to use lowpressure steam in the reboiler, the
bottom temperature must be no higher than deg C Estimate the
bottom pressure for this column.
f Assume that the tray efficiency is Estimate the maximum
weir height for which trays can be designed to meet the pressure
specifications.
g Determine the diameter of a packed tower to operate at
of flooding using in ceramic Berl saddles. Determine the
diameter both above and below the feed.
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