34
1.1 MENENTUKAN UKURAN PARTIKEL
Ukuran partikel ditentukan dengan persamaan 2.17 √
dengan data sebagai berikut: Tabel L1.2. Data Besaran Untuk Fasa Cair Etanol Murni
Viskositas Larutan μ
L
0,000980 kgm.s Panjang Batang h
0,21 m
Percepatan Gravitasi g 9,8
ms
2
Densitas Partikel Tepung ρ
p
1250 kgm
3
Densitas Larutan ρ
L
802 kgm
3
Maka, ukuran partikel saat t = 1500 detik adalah: √
√
1.2 MENENTUKAN KUMULATIF MASSA PARTIKEL
Penentuan kumulatif massa partikel menggunakan persamaan 2.15 dan 2.16
1 x
D G
G G
G x
R
B B
B Rt
Tabel L1.3. Data Besaran Untuk Fasa Cair Etanol Murni Pada Waktu 1500 detik Selisih waktu ∆t
60 detik
Selisih massa batang ∆G
Bt
0,0000002 kg
Massa batang saat t = 1500 detik G
Bt
0,0780373 kg
Massa batang saat t = 0 detik G
B0
0,0779928 kg
Massa batang saat t akhir G
B∞
0,0780563 kg
t dt
dG G
G
Bt Rt
Bt
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35 Maka:
t dt
dG G
G
Bt Rt
Bt
t dt
dG G
G
Bt Bt
Rt
1500 60
0000002 ,
0780473 ,
Rt
G 0780323
,
Rt
G
Kumulatif Massa Oversize R:
B B
B Rt
G G
G G
x R
0779928 ,
0780563 ,
0779928 ,
0780323 ,
x
R 0, 57895
R x
Kumulatif Massa Undersize D:
Rx x
D 1
1 0, 57895
D x
0, 42105
D x
0, 42105 100 persentase D x
x
42,105 persentase D x
Berdasarkan perhitungan yang dilakukan, maka didapatkan hasil distribusi ukuran partikel untuk fasa cair etanol murni, metanol murni, dan kerosin yang
ditunjukkan pada Tabel L1.4, L1.5, dan L1.6.
Universitas Sumatera Utara
36 Tabel L1.4. Distribusi Ukuran Partikel Menggunakan Fasa Cair Etanol Murni
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D Ukuran
Partikel x μm
Kumulatif Massa
Undersize D
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D 113,491
100,000 17,944
33,333 12,533
14,035 80,250
89,474 16,918
31,579 12,457
14,035 65,524
82,456 16,733
31,579 12,383
12,281 56,745
77,193 16,554
29,825 12,310
12,281 50,755
71,930 16,381
28,070 12,238
12,281 46,332
68,421 16,213
28,070 12,168
10,526 42,895
63,158 16,050
28,070 12,098
10,526 40,125
61,404 15,892
28,070 12,030
10,526 37,830
57,895 15,738
28,070 11,832
10,526 35,889
56,140 15,589
28,070 11,768
10,526 34,219
52,632 15,444
26,316 11,406
8,772 32,762
52,632 15,303
24,561 11,349
7,018 31,477
50,877 15,166
24,561 10,870
7,018 30,332
49,123 15,032
24,561 10,821
5,263 29,303
49,123 14,902
24,561 10,772
5,263 28,373
47,368 14,775
22,807 10,724
5,263 27,526
45,614 14,652
22,807 10,676
3,509 26,750
45,614 14,531
22,807 10,492
1,754 26,037
45,614 14,413
22,807 10,448
0,000 25,377
43,860 14,299
21,053 24,766
43,860 14,186
21,053 24,196
42,105 14,077
21,053 23,664
42,105 13,970
19,298 23,166
42,105 13,763
19,298 22,698
42,105 13,663
19,298 22,257
40,351 13,565
19,298 21,841
40,351 13,469
17,544 21,448
40,351 13,375
17,544 21,075
38,596 13,283
17,544 19,464
38,596 13,193
17,544 19,183
36,842 13,105
15,789 18,915
36,842 13,018
15,789 18,658
36,842 12,934
15,789 18,411
35,088 12,850
14,035 18,173
35,088 12,610
14,035
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37 Tabel L1.5. Distribusi Ukuran Partikel Menggunakan Fasa Cair Metanol Murni
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D Ukuran
Partikel x μm
Kumulatif Massa
Undersize D
Ukuran Partikel
x μm
Kumulatif Massa
Undersize D
90,436 100,000
14,309 25,106
8,104 4,468
70,998 89,043
14,103 23,830
8,066 3,936
58,172 81,489
13,906 22,766
8,029 3,617
51,248 75,958
13,360 21,170
7,992 3,298
45,946 69,894
13,192 20,532
7,955 3,191
42,033 66,170
12,724 18,192
7,919 2,340
38,991 62,234
12,578 17,979
7,780 2,021
36,540 60,106
12,043 16,383
7,747 1,489
34,509 57,766
11,683 15,426
7,714 1,277
32,791 54,787
11,570 15,213
7,681 0,745
31,313 52,234
10,118 14,468
7,617 0,319
30,023 49,255
10,045 13,830
7,583 0,000
28,886 47,553
9,972 12,979
27,873 44,787
9,902 12,660
26,962 43,404
9,833 12,234
26,139 42,553
9,765 12,021
25,389 41,064
9,699 11,596
24,703 40,319
9,328 11,489
24,072 39,149
9,271 10,426
19,687 37,553
9,214 9,894
19,237 36,277
9,104 9,787
18,244 34,575
9,050 9,362
17,398 33,830
8,997 8,511
17,031 32,766
8,945 7,340
16,687 32,128
8,894 7,128
16,363 30,532
8,844 6,915
15,494 29,255
8,795 6,383
15,233 28,404
8,746 5,851
14,986 27,021
8,699 5,532
14,750 26,489
8,143 4,787
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38 Tabel L1.6. Distribusi Ukuran Partikel Menggunakan Fasa Cair Kerosin
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D Ukuran
Partikel x μm
Kumulatif Massa
Undersize D
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D 154,794
100,000 27,802
58,324 17,640
19,264 109,456
100,910 27,364
57,452 17,527
19,037 89,370
96,397 26,946
56,769 17,416
18,620 77,397
92,643 25,448
54,721 17,306
18,278 69,226
90,671 24,475
54,001 17,199
17,596 63,194
88,889 24,175
53,622 17,094
16,534 58,507
86,765 23,885
52,863 16,991
15,358 54,728
84,718 23,606
52,332 16,889
13,917 51,598
83,390 23,336
51,536 16,790
11,908 48,950
81,911 23,075
50,398 15,882
11,263 46,672
79,636 22,823
49,829 15,799
10,353 44,685
78,498 22,579
48,730 15,717
9,746 42,932
77,361 21,891
46,985 15,479
8,987 41,370
76,337 21,675
46,341 15,403
8,684 39,968
74,896 21,466
45,355 15,327
8,457 38,698
74,024 21,065
44,558 15,252
7,774 37,543
73,151 20,872
44,217 15,179
7,243 36,485
72,279 20,685
43,534 15,106
6,864 35,512
71,445 20,503
42,966 15,035
6,371 34,613
70,800 20,325
41,676 14,965
5,954 33,779
69,852 20,152
41,107 14,895
5,612 33,002
68,715 19,984
38,832 14,827
5,233 32,277
67,501 19,819
37,088 14,759
4,968 31,597
66,515 19,659
34,850 14,692
4,020 30,959
64,619 18,911
32,613 14,562
3,413 30,358
63,178 18,772
31,930 14,498
3,337 29,790
62,116 18,635
27,228 14,435
3,072 29,253
61,396 18,501
23,777 14,372
1,214 28,744
60,410 18,371
21,388 14,190
0,038 28,261
59,651 18,243
19,302 14,131
0,000
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39 Untuk pembanding hasil dari Metode Pengapungan Batang, digunakan Metode
Sedimentation Balance dengan data distribusi ukuran partikelnya pada Tabel L1.7
Tabel L1.7. Distribusi Ukuran Partikel Metode Sedimentation Balance Ukuran
Partikel x μm
Kumulatif Massa
Undersize D
Ukuran Partikel
x μm Kumulatif
Massa Undersize
D Ukuran
Partikel x μm
Kumulatif Massa
Undersize D
113,491 100,000
20,384 13,208
12,934 4,717
80,250 87,736
19,756 12,736
12,850 4,245
65,524 76,415
19,464 12,264
12,769 4,245
56,745 67,453
19,183 11,792
12,689 4,245
50,755 59,434
18,915 11,792
12,383 3,774
46,332 53,774
18,658 11,321
12,310 3,774
42,895 48,585
17,944 10,849
12,238 3,774
40,125 43,396
17,724 10,377
12,168 3,774
37,830 40,094
16,918 9,906
12,098 3,302
35,889 36,321
16,733 9,434
12,030 3,302
34,219 33,491
16,050 8,962
11,963 3,302
32,762 30,660
15,892 8,491
11,897 2,830
31,477 28,302
15,444 8,019
11,583 2,830
30,332 27,358
15,303 7,547
11,523 2,358
29,303 25,943
14,531 7,075
11,464 2,358
28,373 24,057
14,413 6,604
11,406 2,358
27,526 22,642
14,299 6,604
11,349 1,887
26,750 21,226
14,186 6,604
11,293 1,887
26,037 20,283
14,077 6,132
11,237 1,887
25,377 19,340
13,970 6,132
11,183 1,887
24,766 18,396
13,865 6,132
11,129 1,887
24,196 17,453
13,763 5,660
11,076 1,415
23,664 16,981
13,663 5,660
11,023 1,415
23,166 16,038
13,565 5,660
10,821 0,943
22,698 15,566
13,469 5,660
10,772 0,943
22,257 15,094
13,375 5,189
10,724 0,472
21,841 14,623
13,283 5,189
10,629 0,472
21,448 14,151
13,193 5,189
10,583 0,472
21,075 14,151
13,105 5,189
10,404 0,000
20,720 13,679
13,018 4,717
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40
LAMPIRAN 2 FOTO PERCOBAAN
2.1 BATANG ALUMINIUM
Kategori