Question

Two instantaneous evaporation chambers are connected, as shown in the diagram. Both work at 1 atm of pressure. The feed to the first tank is a binary mixture of methanol and water containing 55 mol% methanol. The feed flow rate is 10,000 kgmol / h. The second instantaneous evaporation tank works with (V / F) 2a. What is the fraction evaporated in the first instantaneous evaporation tank? B. How much are y = 0.7, and the composition of the liquid product is 25 mol% of methanol. Balance data appear in Table 2-7 1, y2, x1, T1 and T2?

T	Metanol (L)	Metanol (V)
373.15	0	0
369.55	2	13.4
366.65	4	23
364.35	6	30.4
362.45	8	36.5
360.85	10	41.8
357.55	15	51.7
354.85	20	57.9
351.15	30	66.5
348.45	40	72.9
346.25	50	77.9
344.35	60	82.5
342.45	70	87
340.75	80	91.5
339.15	90	96.8
338.15	95	97.9
337.65	100	100

Answer 1

Solution! Glven that Fox Psessionthe bubble te(ubble and dew tempesatuse ae) in tesms of mole faacion of methanol on cgu& baoxe as follows 99.037-138 437-3565 2+143-1 bubble Taew = 100.06-30.966 x + au. 357よー65-434 36.74יצ Fo -the value in arge -) and ol intesval calcahte Tp and Taes using above expsession Tbubble detw 0O 99837 87.973 o 81 386 97 144 91485 88 30 gy-7H6 80-812 0-3 75-114 73. 347 71.373

Hese, in the above cuve the sod te sepsesents ubble Cne and the blue tne xepsesents dewGre [R)ts given by Fi yi_x; HeSt スits the mole focton & metrond in-feed rits the mole faction a methanol;nG9ud y is the mole -fsaction methrol in vapous TO estimatc tempesatuse of the fist sepaxas EtYct obtain -the buble de tempesatuve at x-o3s le9037-138940-55)+314055-356slous 143-77l55)7 +36-74 lo 55) The tempesatuse the Asst sepaxas Ge betiee tbubble and dle tempesatuxe hna

assume rt to be 75 T=75c tox the Fisst sepasatnY i)zis andl temp 100 40 to 7 75 Co Compositio/xy ss F3om the japh Recoxite the equation

0.5.5-0,4) o-74-b 4 万 Thus the Asaction& -feed vapoiacd in the-Axst in the second sepasb -l) mole fsachon & tempesatusethe poxatost ehtion fox Tbubble as Bb ть 79132 Now substitute 79 13atos Toeus in selabon and solve x

79-21 -100 06-30 966 (x)+24 365733 36-70 Thus the mole peactionmethorl in vapoas leaving seconol sepasoba