Question: SPP3701 Minor Test 01 2022 QUESTION 2 A feed mixture containing 100 kmol/h enters a flash drum at 690 kPa and 366.5K. The feed contains

SPP3701 Minor Test 01 2022 QUESTION 2 A feed mixture containing

SPP3701 Minor Test 01 2022 QUESTION 2 A feed mixture containing 100 kmol/h enters a flash drum at 690 kPa and 366.5K. The feed contains 17, 23, 28, and 32 mol% propane, n-butane, n-pentane, and n- hexane, respectively. It can be assumed that equilibrium has been reached in the drum. Table 2: The K-values Component K propane 3.8 n-butane 1.5 n-pentane 0.6 n-hexane 0.25 2.1. Calculate the equilibrium flowrate of the vapour and liquid streams leaving the flash drum. Iterate at least three times until the same result is obtained. (HINT: Calculate the mole fraction of the feed that enters as vapour). (24) [24 Marks] QUESTION 3 Table 3 contains information for an extraction process. Calculate: 3.1. (3) The selectivity (separation factor). The distribution coefficient (K). 3.2. (2) Table3: Information for extraction system Component A (solvent) B (solute) C (diluent) Extract (mass%) 5 20 75 Raffinate (mass%) 42 33 25 [5 marks] TOTAL MARKS [40] 2

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