Question: a feed to distillation column consisting of ethanol and rest...
A feed to distillation column consisting of ethanol and rest water is separated into two product streams by fractional distillation. The vapor leaving the top of the column, which contains 80% (by mole) ethanol. This top stream is completely condensed and splits into two equal fractions: One is removed as over head product stream, and the other (reflux) is recycled to the top of the column. The overhead product stream contains 70% ethanol fed to the column. The liquid leaving the bottom of the column is fed to a partial reboliler in which 45% of the liquid was vaporized and that vapor is recycled to the column to become rising vapor stream in the column. Residual liquid stream in reboiler is removed as a bottom product stream. The composition of the stream leaving the reboiler is 70% water. The feed amount is 100 kmol/hr
A) Calculate the molar amounts of the overhead and bottom products.
B) What is the composition of feed? If feed is saturated liquid then what is feed temperature?
C) What is the temperature of the top vapor stream as it enters the condenser assuming the equilibrium stage operation in distillation column and the column operates at an absolute pressure of 1 atm.
D) What is the temperature of condenser if the overhead product is saturated liquid?
E) What is the temperature of reboiler assuming equilibrium opration?