Question: A bubble-cap tray absorber is designed to absorb 40% of the propane from a rich gas at 4 atm. The specifications for the entering rich

A bubble-cap tray absorber is designed to absorb 40% of the propane from a rich gas at 4 atm. The specifications for the entering rich gas and absorbent oil are as follows:

Absorbent Oil Rich Gas Fiow rate, kmol/s 11.0 11.0 Temperature, C 32

(a) Determine the number of equilibrium stages required and the splits of all components.

(b) Determine the actual number of trays required and the splits and Murphree vapor-tray efficiencies of all components.

Absorbent Oil Rich Gas Fiow rate, kmol/s 11.0 11.0 Temperature, C 32 62 Pressure, atm Mole fraction: Methane 0.286 Ethane 0.157 0.240 Propane 0.02 n-Butane 0.169 0.148 n-Pentane 0.05 n-Dodecane 0.93

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The ChemSep program was applied to both cases using the SRK method for Kvalues and enthalpies a It was determined for the equilibrium stage method that the average Kvalue for propane was about 30 Ther... View full answer

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