Question: A gas stream consisting of n-hexane in methane is fed to a condenser at 60C and 1.2 atm. The dew point of the gas (considering

A gas stream consisting of n-hexane in methane is fed to a condenser at 60°C and 1.2 atm. The dew point of the gas (considering hexane as the only condensable component) is 55°C. The gas is cooled to 5°C in the condenser recovering pure hexane as a liquid. The effluent gas leaves the condenser saturated with hexane at 5°C and 1.1 atm and is fed to a boiler furnace at a rate of 207.4Us where it is burned with 100% excess air that enters the furnace at 200°C. The stack gas emerges at 400°C and 1 atm and contains no carbon monoxide or unburned hydrocarbons. The heat transferred from the furnace is used to generate saturated steam at 10bar from liquid water at 25°C.

(a) Calculate the mole fractions of hexane in the condenser feed and product gas streams and the rate of hexane condensation (liters condensate/s).

(b) Calculate the rate at which heat must be transferred from the condenser (kW) and the rate of generation o steam in the boiler (kg/s).

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a Basis 2074 liters 2732 K 11 atm H C6H14 M CH4 no mols Yo mol C Hmol 1y mol CH mol 60C 12 atm Tip 55C 1 mol 2782 K 10 atm 224 litersSTP y Q kW conden... View full answer

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