a. Menghitung Panas Masuk
SiO
2
: Qi
SiO2
= N
6 SiO2
.
303 298
2
dT Cp
SiO
= 85,2960 kmoljam. 1840,5824 Jmol = 156.994,2867 kJjam
C : Qi
C
= N
6 C
.
303 298
dT Cp
C
= 256,6805 kmoljam. 529,4370 Jmol = 135.896,1639 kJmol
FePO
4
: Qi
FePO4
= N
6 FePO4
.
303 298
4
dT Cp
FePO
= 0,5678 kmoljam. 474,5705 Jmol = 269,4703 kJjam
Na
2
O : Qi
Na2O
= N
6 Na2O
.
303 298
2
dT Cp
O Na
= 1,5893 kmoljam. 346,4530 Jmol = 550,6137 kJjam
H
2
O : Qi
H2O
= N
7 H2O
.
303 298
2
dT Cp
O H
= 9,5179 kmoljam. 374,6878 kJmol = 3.566,2332 kJjam
b. Menghitung Panas Keluar
SiO
2
: Qo
SiO2
= N
8 SiO2
.
313 298
2
dT Cp
SiO
= 85,2960 kmoljam. 2.301,5507 Jmol = 196.313,0313 kJjam
C : Qo
C
= N
8 C
.
313 298
dT Cp
C
= 256,6805 kmoljam. 621,9829 Jmol = 159.650,8941 kJmol
UNIVERSITAS SUMATERA UTARA
FePO
4
: Qo
FePO4
= N
8 FePO4
.
313 298
4
dT Cp
FePO
= 0,5678 kmoljam. 1.461,4185 Jmol = 830,4358 kJjam
Na
2
O : Qo
Na2O
= N
8 Na2O
.
313 298
2
dT Cp
O Na
= 1,5893 kmoljam. 1.050,3585 Jmol = 1.668,7526 kJjam
H
2
O : Qo
H2O
= N
8 H2O
.
313 298
2
dT Cp
O H
= 9,5179 kmoljam. 1.125,7408 kJmol = 10.714,6635 kJjam
Tabel B. 5 Neraca Energi pada Pelletizing Machine L-102
Komponen Masuk kJ
Keluar kJ
SiO
2
156.994,2867 196.313,0313
C 135.896,1639
159.650,8941 Na
2
O 269,4703
1.668,7526 FePO
4
550,6137 830,4358
H
2
O 3.566,2332
10.714,6635 Jumlah
297.276,7679 369.177,7774
∆Hr -
- Q
71.901,0095 -
Total 369.177,7774
369.177,7774
UNIVERSITAS SUMATERA UTARA
B.2.2 Bucket Elevator C-110
Fungsi : Mengangkut bahan baku dari pelletizing machine ke rotary kiln pre-heater
. Asumsi : terjadi penurunan suhu bahan menjadi 35
C, selama pengangkutan.
40
o
C, 1 atm 35
o
C, 1 atm
SiO
2
C FePO
4
10Na
2
O.30SiO
2
.60H
2
O H
2
O H
2
O SiO
2
C FePO
4
10Na
2
O.30SiO
2
.60H
2
O
8 9
a. Menghitung Panas Masuk
Panas masuk bucket elevator sama dengan panas keluar pelletizing machine pada alur 8, yaitu = 369.177,7774 kJjam.
b. Menghitung Panas Keluar
SiO
2
: Qo
SiO2
= N
9 SiO2
.
308 298
2
dT Cp
SiO
= 85,2960 kmoljam. 2.069,7463 kJmol = 176.541,0481 kJjam
C : Qo
C
= N
9 C
.
308 298
2
dT Cp
SiO
= 256,6805 kmoljam. 575,1541 Jmol = 147.630,8532 kJmol
FePO
4
: Qo
FePO4
= N
9 FePO4
.
308 298
2
dT Cp
SiO
= 0,5678 kmoljam. 961,7110 Jmol = 546,0781 kJjam
Na
2
O : Qo
Na2O
= N
9 Na2O
.
308 298
2
dT Cp
SiO
= 1,5893 kmoljam. 696,5830 Jmol = 1.107,0712 kJjam
UNIVERSITAS SUMATERA UTARA
H
2
O : Qo
H2O
= N
9 H2O
.
308 298
2
dT Cp
SiO
= 9,5179 kmoljam. 749,9460 Jmol = 7.137,8942 kJjam
Tabel B.6 Neraca Energi pada Bucket Elevator C-110
Komponen Masuk kJjam
Keluar kJjam H
8
H
9
SiO
2
196.313,0313 176.541,0481
C 159.650,8941
147.630,8532 Na
2
O 1.668,7526
1.107,0712 FePO
4
830,4358 546,0781
H
2
O 10.714,6635
7.137,8942 Jumlah
369.177,7774 332.962,9448
∆Hr -
- Q
- 36.214,8326
Total 369.177,7774
369.177,7774
UNIVERSITAS SUMATERA UTARA
B.2.3 Burner B-101
Fungsi : Tempat pembakaran gas alam sebagai sumber panas preheater B-102
CpdT N
CpdT N
C H
r dT
dQ
in s
out s
r 303
298 1136
298
30 .
a. Menghitung Panas Reaksi Pembakaran Gas Alam ∆Hr