Question

wors are cloar and unambiguous Answer the questions in the correct order and ensure that the answors are cioarly numbered. Make sure that all pages of the assignment are numbered and stapiod together Complete the assignment cover accurately and in detail. Question A mixed hydrocarbon stream enters a flash drum stream is 325 kmeol/ assumed that equilibrium is reached i Do at least three iterations until the same value is achieved. The composition of the feed. 00 kPa and 313 K. The flowrate of thhe le 1. It the drum. The values of K, can be found using Fiqure 1. Table 1: Feed flowrates for the hydrocarbon stream Component Feed (kmol/h) methane 50 ethane 75 propane 110 n-pentane 90 Total 325 1.1. Draw a schematic diagram depicting the process, showing all streams entering and leaving the flash drum. (2) (20) 1.2. Determine the mole fraction of the feed that enters as a vapour (4) 1.3. Determine the composition of the liquid and vapour product streams. [26 Marks] SEP4701/101/0/2019 150 200 250 300 400- 500-- 600 1500- Fiqure 1: K-values of syst gineerine sHigh-temperature rangel (D B. Dadyburior, chemical No. 4, pp 86. 1978 uestion 2 On 8운2222 2 요 을 8 88 R8 8 유유 8 으 Hml ulauluulwwwluwlulwu 3NVNON-N 3w N-N 3NYOND-N 3NYNON- N 3NVDO-N 3NWING-N 3NWANSOG 3NVANE-N 3NTHA3 AN3TAMS 3N3d 2NVHI3 3N3AH3 3NTHA 3 8 8883 od 38nss3d

Answer 1

Basis hr ope ation T- 313K 104 F p 500K Pa -12-51 Psia Feed( Z o.IS3 325 kmole methane-50 Z 0.2307 Ethane 0.338 75 Prpane pertore Liquide) 10 0 2769 n uOb-Ac eprieder chart to Tiven temp and Preune are k values from De (ning K85 F=L+V K-y F-LV 2-5 FR-L7V 028 Fs 1+ L V F 2 y.- +1 Let L o.18 F V 눈이다 LIV 1-18 V V Let O.16 F 16 V - 1-0l1 6 L 0.15 Le t V V 1-007

0.15 V 115 V F-16 NM7 V M15 L 0.15 Given, F= 325 kmole 3.25 V= -15 282 608 kmole L-O15 V 42.391 kmole (C) i = O153 35 ki O.005 1 0.175 0-2307 VK 2 0 2597 O.0371 0.3384 3 O136713 O.l46852 0.2769 020135 4 O 28 O 7405 -009 27-0.929 1+ L VK2 0.2597 bmok traction of teed that enlers as 282.608 vapeur 325 0.869