5. The last step in refining natural gas is removing butane from heavier molecules like pentane in the product stream vi

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5 The Last Step In Refining Natural Gas Is Removing Butane From Heavier Molecules Like Pentane In The Product Stream Vi 1 (42.4 KiB) Viewed 34 times

5. The last step in refining natural gas is removing butane from heavier molecules like pentane in the product stream via fractional distillation apparatus called a debutanizer. Butane has a boiling point of 0 °C and Pentane has a 36 °C. The debutanizer is fed a 1000 mol/hr stream of 25 °C 33% butane solution and produces a 10 °C vapor stream of 95% butane and a 30 °C liquid product stream of 98% pentane. If the condenser operates with an R-2, and the butane distillate leaves at -10 °C, and the system is cooled by air entering at -20 °C and leaving at 5 °C, what is the flow rate of air needed to cool this system? (6 Pts) Material Co AH (kJ mol¹) 22.44 (25 °C) Butane (1) 132.42 (Jmol ¹K¹) Butane(g) 98.49 (Jmol ¹K¹) Pentane (1) 157.19 (Jmol ¹K¹) 26.20 (25 °C) Pentane (g) 120.07 (Jmol ¹K¹) Air (g) 1.005 (Jg ¹K¹)