A-180 Tabel C.13.6. Data hasil perhitungan trial T
bubble
feed
Komponen xi
Po mmhg Ki
a xia
yi C8H10
0.1945 284.6537
0.37455 0.5611
0.1091 0.0728
CH3COOH 0.0804
507.3537 0.6676
1 0.0804
0.0537 HBr
0.0039 507.3537
0.6676 1
0.0039 0.0026
CH3COO2Co 0.0006
507.3537 0.6676
1 0.0006
0.0004 CH3COO2Mn
0.0005 507.3537
0.6676 1
0.0005 0.0003
C8H6O4 6.41E-
07 3.481E-10 4.580E-13 6.861E-13 4.397E-19 2.935E-19
H2O 0.7201
918.6135 1.2087
1.8106 1.3039
0.8702 total
1 1.4984
1
b. Menentukan Temperatur DEW Point Distilat
Pada keadaan dew point, K Heavy key = 1 yia. Dengan cara trial T pada
tekanan operasi 1 atm hingga K Heavy key = 1 yia, maka akan diperoleh
temperatur dew point distilat. Dari perhitungan didapat kondisi produk distilat DC-401 :
P = 1 atm = 760 mmHg
T = 100.020902
o
C 373.170902 K Tabel C.13.7. Data hasil perhitungan trial T
Dew
distilat
komponen yi
Po mmhg Ki
a KiKhk yia
xi C8H10
238.2395 0.3135
0.563 CH3COOH
1.117E- 05
423.1762 0.5568
1 1.117E-05 0,00002
HBr 423.1762
0.5568 1
CH3COO2Co 423.1762
0.5568 1
CH3COO2Mn 423.1762
0.5568 1
C8H6O4 1.097E-10 1.444E-13 2.593E-13
H2O 0.99999
760.656 1.0009
1.7975 0.5563
0.99998 total
1 0.5563
1
A-181
c. Menentukan Temperatur Bubble Point Bottom
Pada keadaan bubble point, K Heavy key = 1 xi x a. Dengan cara trial T
pada tekanan operasi 1 atm hingga K Heavy key = 1 xi x a maka akan
diperoleh temperatur bubble point bottom. Dari perhitungan didapat kondisi produk distilat MD-301 :
P = 1 atm = 760 mmHg
T = 130.36330101
o
C 403.5131010 K
Tabel.C.13.8. Data hasil perhitungan trial T
bubble
bottom produk
komponen xi
Po; mmHg Ki
a xia
yi C8H10
0.6948 609.0963
0.8014 0.5506
0.3826 0.5561
CH3COOH 0.2872
1106.2095 1.4555
1 0.2872
0.4175 HBr
0.0139 1106.2095
1.4555 1
0.0139 0.0202
CH3COO2Co 0.0021
1106.2095 1.4555
1 0.0021
0.00297 CH3COO2Mn
0.0018 1106.2095
1.4555 1
0.0018 0.0026
C8H6O4 2.289E-06
3.62E-08 4.77E-11 3.27E-11 7.49E-17 1.091E-16
H2O 0.0003
2060.9833 2.7118
1.8632 0.0005
0.0007 total
1 9.3354
6.4137 0.688
1
E. Neraca Energi DC-401 a. Menghitung panas umpan
Kondisi umpan masuk : T in = T bubble point feed = 105.37C 378.37 K
Tref = 25
o
Q = n x ∫Cp dT
A-182 Perhitungan Q umpan dapat dilihat pada tabel berikut:
Tabel C.13.9. Perhitungan Q umpan DC-401
komponen kmoljam
∫Cp.dT KJKg.K Q=n∫Cp dT KJjam C8H10
27.96 11563.32165
323314.3439 CH3COOH
11.56 5559.989154
64266.88044 HBr
0.56 5559.99
3103.31214 CH3COO2Co
0.08 5559.99
457.8135279 CH3COO2Mn
0.07 5559.99
407.5466044 C8H6O4
0.00 0.00
H2O 103.52
2717.318039 281302.7128
total 143.76
672852.6094
b. Menghitung panas distilat
T
T dew distilat
= 100.020902
o
C 373.170902 K Tref
= 25
o
C 298,15 K Tabel C.13.10. Perhitungan Q distilat DC-401
komponen kmoljam
∫Cp.dT KJKg.K
Q=n∫Cp dTKJjam
C8H10 10738.24285
CH3COOH 0.00115588
1 5172.690846
5.979017134 HBr
5172.690846 CH3COO2Co
5172.690846 CH3COO2M
n 5172.690846
C8H6O4 H2O
103.511837 2
2539.923553 262912.1534
total 262918.1324
c. Menghitung panas liquid refluks