An absorber is being employed to absorb CO2from air into a dilute-caustic solution. The enteringgas containing 3 mol % C
Posted: Thu Jul 14, 2022 3:32 pm
An absorber is being employed to absorb CO2from air into adilute-caustic solution. The enteringgas containing 3 mol % CO2witha flow rate of 792 lbmol/h at 60° F, 1 atm where equilibriumisgiven asy = 1.75 x(units are in mole fractions). Assume causticsolution has the properties ofwater. It is desired to recover 97%CO2in the liquid outlet stream. The solvent rate is 1.4 timestheminimum solvent rate.Determine:i) Maximum possible concentrationof CO2in the caustic solutionii) Minimum caustic solution-to-airmolar flow rate ratioiii) Caustic solution rateiv) Number ofequilibrium stages required