In an absorber, HETP does not vary with the

Related MCQs

• In a packed tower, the value of HETP equals HTUOG, when the equilibrium and the operating lines are (where, HETP = height equivalent to a theoretical plate HTUOG = overall gas phase height of a transfer unit).
• Acetone is to be removed from air in an isothermal dilute absorber using pure water as solvent. The incoming air contains 5 mole% of acetone (yin = 0.05). The design equation to be used for obtaining the number of trays (N) of the absorber is, N+2 = 6 log (yin/yout).For 98% recovery of acetone, the number of trays required is/are:
• HETP is numerically equal to HTU, only when the operating line
• In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
• Which of the following quantities need not be fixed before starting the design of a cocurrent absorber?
• H2S is being absorbed in a gas absorber unit. The height of the transfer unit based on the overall mass transfer coefficient on the gas side is 0.4 m. The equilibrium data is given by, y = 1.5 x. The bulk concentration of H2S has to be reduced from 0.05 to 0.001 mole fraction in the gas side. The height of the tower (in metres) corresponding to an operating line given by, y = 5x + 0.001 is
• For the same system, if the same liquid used in an absorber is decreased, the tower height will
• The minimum liquid rate to be used in an absorber corresponds to an operating line
• The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is
• For a single component absorber, the operating line is straight only when plotted in term of __________ units.