Prbset13 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.:...

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CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.: CHEG5301 STUDENT: ___________________ COURSE: Thermodynamics INSTRUCTOR: Prof. Anderson SUBJECT: Problem Set 13 DUE: Wednesday, Nov. 19, 2008 1. In a refinery a mixture of hydrocarbons is flashed from liquid at high pressure to a liquid- vapor mixture. The flash/separator operates at a temperature of 160 ° F and pressure of 250 psia. The hydrocarbon feed to the flash/separator consists of 25% ethane, 35% propane, 20% n-butane, 15% n-pentane, and 5% n-hexane. 2. For the system n-hexane(1) and 1,4-dioxane(2) determine the dew-point temperature for a vapor composition of y 1 = 0.7 and a pressure of 150 kPa. The NRTL parameters for this system are: g 12 = 307.8 cal/mol-K g 21 = 615.1 cal/mol-K α 12 = 0.3034 and the vapor pressures of the pure species are given by: log ( , () . 10 1 231146 P tC sat o kPa) = 6.07761- 1209.740 + log ( , . 10 2 240337 P sat o kPa) = 7.55645- 1554.679 + 3. The NRTL parameters given below have been determined for the system diethyl ether(1)- water(2). Use these parameters to calculate the compositions of the two liquid phases in equilibrium at a temperature of 15 ° C.
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Prbset13 - CHEMICAL ENGINEERING THERMODYNAMICS COURSE NO.:...

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