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TUGAS 2 PERPINDAHAN MASSA
Oleh: Annisaa Nurqomariah Sign up to vote on this title 1406608082 Useful Teknik Kimia
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1. Define component A and B, calculate using analytical method and software if the mix of them is flash vaporized. A liquid mixture containing 40 mol% n-heptane and 60 mol% n-octane at 100
continuously flash vaporised at 1 atm pressure. If the operation is continued till 50 mol% the mixture is vaporised, determine the compositions of the distillate and the residue. Diketahui:
Basis = 100 mol feed Titik didih n-heptana saat 1 atm = 98,4oC Titik didih n-oktana saat 1 atm = 125,6oC zF = 0,4 mol D = 50 mol W = 100-50 = 50 mol
-
= −
50
= -1
50
Ditanya:
You're Reading a Preview Komposisi distilat dan residu jika 50% dari campuran diuapkan
Jawab:
Perhitungan Analitik
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#1 Mengidentifikasi Komponen
Komponen yang terdapat di dalam campuran adalah n-heptan a dan n-oktana. Masing –
titik didih n-heptana dan n-oktana adalah sebesar 98,4oC dan titik didih 125,6oC. Menurut
Signmudah up to vote on this title titik didih n-oktana lebih tinggi, maka n-oktana akan lebih menguap daripada n-he
senyawa B. Maka, n-oktana sebagai senyawa A dan n-heptana sebagai Useful
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#3 Menghitung Fraksi Mol pada Distilat dan Waste
Perhitungan fraksi mol n-heptana dan n-oktana di distilat (berupa vapor) dan waste (b
liquid) pada suhu dengan rentang antara titik didih kedua senyawa yang akan dipisahkan, pada rentang 98,4oC sampai 125,6oC. Persamaan yang digunakan adalah
=
− −
∗ =
dimana Pt = 1 atm = 760 mmHg
T (OC)
98.4
ln (Pa)
ln (Pb)
2.880530441 2.52277082
Pa
Pb
x
101.325
12.4630818
1
101.12
2.914919774 2.56130736 18.4473324 12.9527402 16.0834975 2.92
103.84 106.56
2.94872519 2.59917413 19.0816128 13.4526233 15.6106842 2.93 You're Reading a Preview 2.981961434 2.63638842 19.7264709 13.9626851 15.1571065 2.95
109.28
Unlock full access with a free trial. 3.014642762 2.67296696 20.3818085 14.4828757 14.7216669 2.96
112
3.046782955
114.72
2.7089259 21.0475246 15.0131413 14.3033438 2.97 Download With Free Trial 3.078395344 2.74428086 21.7235156 15.5534248 13.9011851 2.98
117.44 120.16
3.109492824 2.77904691 22.4096759 16.1036654 13.5143028 2.98 3.140087873 2.81323866 23.1058972 16.6637994 13.1418683 2.99
122.88
3.170192571 2.84687022 23.8120694 17.2337595 12.7831072 3.00
125.6
3.199818612 2.87995525 24.5280807 17.8134759 12.4372956 3.01 Sign up to vote on this title
*Range antar suhu adalah 2.72
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Dari data diatas, maka dapat dibuat grafik komposisi x dan y:
GRAFIK X-Y N-HEPTANA 1 0.9 * Y 0.8 , R O P A0.7 V M A L 0.6 A D A N0.5 A T P E H - 0.4 N L O M0.3 I S K A R 0.2 F
T F
0.1
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0
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0
0.8
1
FRAKSI MOL N-HEPTANA DALAM LIQUID, X Download With Free Trial
Titik F pada grafik diatas menunjukkan komposisi feed. Garis operasi digambar dari ti
dengan slope -1 bersinggungan dengan kurva kesetimbangan pada T, dimana y*D = 0,495 f mol n-heptana dan xW = 0,305 fraksi mol n-heptana.
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Komposisi vapour: 49,5% n-heptana dan 50,5% n-oktana
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Perhitungan dengan Software Unisim
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Download Free 2. Similar to number 1, calculate for mixtureWith of A, B, Trial and C components.
A liquid containing 50 mol % benzene (A), 30 mol % toluene (B), and 20 mol % o-xy
(C) is flash vaporized at 1 std atm pressure and 100 oC. Compute the amounts of li and vapour products and their composition. Diketahui:
Komponen A = Benzena
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Ditanya:
Komposisi waste dan distilat Jawab:
Persamaan Antoine:
log = −
+
Parameter Antoine:
Benzene Toluene O-xylene
A B C 6.87987 1196.76 219.161 6.95087 1342.31 219.187 7.00154 1476.393 213.872
Menghitung nilai W/D dengan menggunakan goal seek di Microsoft Excel, didapatk W/D = 0.991
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Rumus yang digunakan untuk perhitungan Download With Free Trial ( + 1) ∗ = 1 + /
=
∗
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Tabel perhitungan tekanan uap jenuh (untuk goal seek W/D):
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YD
Xw
Benzena
0.637
0.359
Toluena
0.254
0.347
O-Xylene
0.083
0.320
SUM
0.975
1.026
Perhitungan dengan Software Unisim
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DAFTAR PUSTAKA
Sinha, A. P. dan Prameswar De. 2012. Mass Transfer Principles and Operations. New Delh PHI Learning Treybal, Robert E. 1981. Mass-Transfer Operations. Tokyo: McGraw Hill, Inc.
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