ULA, AMIROTUL (2015) KARAKTERISTIK GEOKIMIA ORGANIK FRAKSI KETON BATUBARA TARAKAN, KALIMANTAN UTARA DAN BATUBARA SAWAHLUNTO, SUMATERA BARAT. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Batubara Tarakan, Kalimantan Utara dan batubara
Sawahlunto, Sumatera Barat dianalisis untuk menentukan karakter
geokimia organiknya. Batubara diekstraksi soxhlet dengan
diklorometana:metanol (93:7) sebagai pelarut. Hasil ekstrak
organik difraksinasi menjadi fraksi alifatik, aromatik, keton dan
polar menggunakan kromatografi kolom. Fraksi keton kemudian
dianalisis menggunakan Kromatografi Gas-Spektrometri Massa
(KG-SM). Hasil analisis fraksi keton batubara Tarakan
menunjukkan keberadaan senyawa sikloheksil keton,
metilsikloheksil keton, dan keton terpen trisiklik. Senyawa
tersebut diasumsikan berasal dari bakteri. Amirenon yang
diidentifikasi dalam sampel merupakan hasil oksidasi β-amirin
selama tahap diagenesis pada tumbuhan tingkat tinggi
Angiospermae. Analisis fraksi keton batubara Sawahlunto
menunjukkan keberadaan senyawa iso dan anteiso-alkan-2-on,
dan isoprenoid keton. Senyawa ini diasumsikan berasal dari rantai
klorofil-α pada bakteri. Senyawa hopanon dan sikloheksil keton
menunjukkan asal usul batubara dari bakteri. Peringkat
kematangan batubara Sawahlunto lebih rendah daripada batubara
Tarakan dikarenakan terdapat senyawa hopanon pada batubara
Sawahlunto. Proses kematangan batubara juga dapat terhambat
jika komponen yang ada pada batubara berikatan dengan oksigen.
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Coal from Tarakan, North Kalimantan and coal from
Sawahlunto, West Sumatera were analyzed to determine the
character of the organic geochemistry. Coals were extracted
Soxhlet with a mixture of diclorometane:methanol (93:7) as a
solvent. The extracts were fractionated into aliphatic, aromatic,
kotones, and polar fraction using column chromatography. Ketone
fractions were analyzed by Gas Chromatography-Mass
Spectrometry (GC-MS). Result of GC-MS analyzed in ketones
fraction of Tarakan coal shown presence of cyclohexyl, methyl
cyclohexyl ketones, and tricyclic terpane ketones. These
compounds were expected formed by bacteria. Amyrenones were
identified in the sample as a result of oxidation β-amyrin during
diagenesis of Angyospermae higher plants. Analyzed of ketones
fraction Sawahlunto coal shown presence of iso and anteisoalkan-
2-one, and isoprenoid ketones. These compound were
expected formed by oxidation of α-chlorophil in the bacteria.
Hopanoids ketone and cyclohexyl ketones shown coal formed
from bacteria. Rank of Sawah Lonto coal lower than Tarakan coal
because there are hopanoids ketone in the Sawahlunto coal.
Hopanoids ketone can inhibit the process of coal maturation. The
process of coal maturation can also inhibited if the compounds in
coal bound with oxygen
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSKi 553.2 Ula k |
| Uncontrolled Keywords: | batubara Tarakan, batubara Sawahlunto, biomarka, fraksi keton, Kromatografi Gas-Sprektrometri Massa (KG-SM). |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Mathematics and Science > Chemistry > 47201-(S1) Undergraduate Thesis |
| Depositing User: | Anis Wulandari |
| Date Deposited: | 05 Jan 2017 08:22 |
| Last Modified: | 24 Aug 2018 07:18 |
| URI: | http://repository.its.ac.id/id/eprint/1346 |
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