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Persamaan kecepatan reaksi dikalkulasi dan didapatkan nilai sebagai berikut:
r = 3.6858. 10 . exp − 2.5616. 10
T PP
.
r = 0.62717. exp − 1.5362. 10
T P
r = 0.08124. exp − 1.2237. 10
T PP
Dimana r
1
. r
2
dan r
3
dalam lbmolmin.ft
3
, T dalam K, dan P
j
dalam psia www.engr.uky.edu
2.3 Diagram Alir Proses dan Tahapan Proses
2.3.1 Diagram Alir Proses
Diagram alir prarancangan pabrik benzene dari toluene dan hidrogen dapat ditunjukan dalam tiga macam, yaitu :
a. Diagram alir proses Gambar 2.1 b. Diagram alir kualitatif Gambar 2.2
c. Diagram alir kuantitatif Gambar 2.3
29
Arus 1 Arus 2
Arus 3 Arus 4
Arus 5 Arus 6
Arus 7 Arus 8
Arus 9 Arus 10
Arus 11 Arus 12
Arus 13 Arus 14
Arus 15 Arus 16
Arus 17 Arus 18
Arus 19 Arus 20
Arus 21 1 H
2
0.000 0.000
0.000 0.000
0.000 6460.000
5404.237 5404.237
5404.237 1683.420
3720.817 2739.183
6460.000 0.000
0.000 1683.420
0.000 0.000
0.000 0.000
0.000
2 CH
4
0.000 0.000
0.000 0.000
0.000 1162.5358 9948.136
9948.136 1659.446
516.918 1142.529
20.007 1162.536
8288.689 8288.689
8805.607 0.000
0.000 0.000
0.000 0.000
3 C
6
H
6
6.541 7.240
0.699 6.541
44.437 312.000 39831.714 39831.714
388.618 121.054
267.563 0.000
267.563 39443.096 1547.207
1668.262 37895.889 37857.993 37.896
0.000 37.896
4 C
7
H
8
50689.943 63362.204 12672.261 50689.943 59415.489 59432.000 8914.800
8914.800 23.981
7.470 16.511
0.000 16.511
8890.819 95.039
102.509 8795.780
26.387 8769.393
43.847 8725.546
5 C
12
H
10
0.000 0.000
0.000 0.000
6.548 6.548
3274.197 3274.197
0.000 0.000
0.000 0.000
0.000 3274.197
0.000 0.000
3274.196 0.000
3274.196 3267.649
6.548
Jumlah 50696.484 63369.444 12672.960 50696.484 59466.473 67373.084 67373.084 67373.084
7476.283 2328.862
5147.421 2759.190
7906.610 59896.801 9930.935 12259.797 49965.866 37884.380 12081.485
3311.496 8769.989
Komponen Laju Alir Massa Overall kgjam
No.
30
Tee5 Tee4
Tee2 H
2
CH
4
H
2
CH
4
C
6
H
6
C
7
H
8
Furnace
H
2
CH
4
C
6
H
6
C
7
H
8
Reaktor
H
2
CH
4
C
6
H
6
C
7
H
8
C
12
H
10
Kondenser
T=25
o
C P=25 atm
FD 1
H
2
CH
4
C
6
H
6
C
7
H
8
CH
4
C
6
H
6
C
7
H
8
C
12
H
10
FD 2
CH
4
C
6
H
6
C
7
H
8
C
6
H
6
C
7
H
8
C
12
H
10
MD 1
C
6
H
6
C
7
H
8
C
6
H
6
C
7
H
8
C
12
H
10
MD 2
C
6
H
6
C
7
H
8
C
12
H
10
C
7
H
8
C
12
H
10
C
6
H
6
C
7
H
8
vaporizer
C
6
H
6
C
7
H
8
C
12
H
10
H
2
CH
4
C
6
H
6
C
7
H
8
C
12
H
10
C
6
H
6
C
7
H
8
C
12
H
10
Recycle 68,9
Produk Benzene
Tee1
T=30
o
C P=1 atm
T=110,78
o
C P=1 atm
T=30
o
C P=25 atm
T=638,7
o
C P=25 atm
T=10,16
o
C P=15 atm
T=10,16
o
C P=15 atm
T=5
o
C P=1 atm
T=5
o
C P=1 atm
T=10,16
o
C P=15 atm
T=10,16
o
C P=15 atm
T=80,24
o
C P=1 atm
T=85,05
o
C P=1 atm
T=117,6
o
C P=1 atm
T=112,07
o
C P=1 atm
T=245,07
o
C P=1 atm
H
2
CH
4
C
6
H
6
C
7
H
8
T=647
o
C P=25 atm
T=80
o
C P=1 atm
T=110,83
o
C P=1 atm
T=189,49
o
C P=25 atm
T=44,4
o
C P=25 atm
T=119,51
o
C P=25 atm
Tee3 H
2
CH
4
C
6
H
6
C
7
H
8
T=54,43
o
C P=25 atm
Fuel gas T=-15,79
o
C P=1 atm
T=-53,72
o
C P=1 atm
DIAGRAM ALIR KUALITATIF PABRIK BENZENE
Tee6
V-3
V-1 V-2
H
2
CH
4
C
6
H
6
C
7
H
8
H
2
CH
4
C
6
H
6
C
7
H
8
T=86,64
o
C P=1 atm
C
6
H
6
C
7
H
8
C
12
H
10
C
6
H
6
C
7
H
8
Gambar 2.2 Diagram Alir Kualitatif 3
31
Tee5 Tee4
Tee2 H
2
6460,000 CH
4
1162,536 C
6
H
6
267,563 C
7
H
8
16,511 7906,610
Furnace
H
2
3720,817 CH
4
1142,529 C
6
H
6
267,563 C
7
H
8
16,511 5147,421
Reaktor
H
2
5404,237 CH
4
9948,135 C
6
H
6
39831,715 C
7
H
8
8914,800 C
12
H
10
3274,197 67373,084
Kondenser FD 1
H
2
5404,237 CH
4
1659,446 C
6
H
6
388,618 C
7
H
8
23,981 7476,283
H
2
1683,420 CH
4
516,918 C
6
H
6
121,054 C
7
H
8
7,470 2328,862
CH
4
8288,689 C
6
H
6
39443,096 C
7
H
8
8890,819 C
12
H
10
3274,197 59896,801
FD 2
CH
4
8288,689 C
6
H
6
1547,207 C
7
H
8
95,039 9930,935
C
6
H
6
37895,889 C
7
H
8
8795,780 C
12
H
10
3274,197 49965,866
MD 1
C
6
H
6
37857,993 C
7
H
8
26,387 37884,380
C
6
H
6
37,896 C
7
H
8
8769,393 C
12
H
10
3274,197 12081,485
MD 2
C
6
H
6
37,896 C
7
H
8
8725,546 C
12
H
10
6,548 8769,989
C
7
H
8
43,847 C
12
H
10
3267,649 3311,496
C
6
H
6
6,541 C
7
H
8
50689,943 50696,484
vaporizer
C
6
H
6
7.240 C
7
H
8
63362.204 63369.444
C
6
H
6
0.699 C
7
H
8
12672.261 12672.960
H
2
6460,000 CH
4
1162,535 C
6
H
6
312,000 C
7
H
8
59432,000 C
12
H
10
6,549 67373,084
C
6
H
6
7.240 C
7
H
8
63362.204 63369.444
purge Recycle 68,9
Produk Benzene
Tee1 C
6
H
6
44,437 C
7
H
8
59415,489 C
12
H
10
6,548 59466,473
H
2
2739,183 CH
4
20,007 2759,190
DIAGRAM ALIR KUANTITATIF PABRIK BENZENE
Fuel gas H
2
1683,420 CH
4
8805,607 C
6
H
6
1668,262 C
7
H
8
102,509 12259,797
Tee3 Tee6
V-3
V-1
V-2
Gambar 2.3 Diagram Alir Kuantitatif
3 1
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32
2.3.2 Tahapan Proses
