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A stream of hot dry nitrogen flows through a process unit
Chapter 5, Problem 5.40(choose chapter or problem)
A stream of hot dry nitrogen flows through a process unit that contains liquid acetone. A substantial portion of the acetone vaporizes and is carried off by the nitrogen. The combined gases leave the recovery unit at 205C and 1.1 bar and enter a condenser in which a portion of the acetone is liquefied. The remaining gas leaves the condenser at 10C and 40 bar. The partial pressure of acetone in the feed to the condenser is 0.100 bar, and that in the effluent gas from the condenser is 0.379 bar. Assume ideal gas behavior. (a) Calculate for a basis of 1 m3 of gas fed to the condenser the mass of acetone condensed (kg) and the volume of gas leaving the condenser (m3 ). (b) Suppose the volumetric flow rate of the gas leaving the condenser is 20.0 m3/h. Calculate the rate (kg/h) at which acetone is vaporized in the solvent recovery unit.
Questions & Answers
QUESTION:
A stream of hot dry nitrogen flows through a process unit that contains liquid acetone. A substantial portion of the acetone vaporizes and is carried off by the nitrogen. The combined gases leave the recovery unit at 205C and 1.1 bar and enter a condenser in which a portion of the acetone is liquefied. The remaining gas leaves the condenser at 10C and 40 bar. The partial pressure of acetone in the feed to the condenser is 0.100 bar, and that in the effluent gas from the condenser is 0.379 bar. Assume ideal gas behavior. (a) Calculate for a basis of 1 m3 of gas fed to the condenser the mass of acetone condensed (kg) and the volume of gas leaving the condenser (m3 ). (b) Suppose the volumetric flow rate of the gas leaving the condenser is 20.0 m3/h. Calculate the rate (kg/h) at which acetone is vaporized in the solvent recovery unit.
ANSWER:Problem 5.40A stream of hot dry nitrogen flows through a process unit that contains liquid acetone. Asubstantial portion of the acetone vaporizes and is carried off by the nitrogen. The combinedgases leave the recovery unit at 205°C and 1.1 bar and enter a condenser in which a portion ofthe acetone is liquefied. The remaining gas leaves the condenser at 10°C and 40 bar. Thepartial pressure of acetone in the feed to the condenser is 0.100 bar, and that in the effluent gasfrom the condenser is 0.379 bar. Assume ideal gas behavior.(a) Calculate for a basis of 1 m3 of gas fed to the condenser the mass of acetone condensed(kg) and the volume of gas leaving the condenser (m3 ).(b) Suppose the volumetric flow rate of the gas leaving the condenser is 20.0 m3/h. Calculatethe rate (kg/h) at which acetone is vaporized in the solvent recovery unit. Step-by-step solution Step 1 of 6 ^As the lower pressure hot gas stream is fed to the condenser, it is cooled and pressurized,which will cause the acetone to condense from the gas phase.