5.12c. Adiabatic absorption of carbon disulfide in a sieve-tray tower.
Determine the number of equilibrium trays for the absorber of Problem 5.11, assuming adiabatic operation. The specific heats are:
Substance J/mole-K
Oil 362.2
CS2, liquid 76.2
N2 29.1
CS2, gas 46.9
the latent heat of vaporization of CS2 at 297 K is 27.91 kJ/mole. The vapor pressure of CS2 as a function of temperature is given by
Solution
Base for enthalpies: liquid oil, liquid CS2, gaseous N2 at 297 K
Assume T1 = 298.0 K
Approximately 12 ideal stages

Gas outlet temperature = 298 K