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ITS » Undergraduate Theses » Kimia Posted by anisw@its.ac.id at 20/05/2016 15:15:55 • 2115 Views
ORGANIC GEOCHEMISTRY CHARACTERISTIC OF KETONES FRACTION OF COAL TARAKAN NORTH KALIMANTAN AND COAL SAWAHLUNTO WEST SUMATERA
Author : ULA, AMIROTUL ( 1410100702 )
ABSTRAK
Batubara Tarakan Kalimantan Utara dan batubara Sawahlunto Sumatera Barat dianalisis untuk menentukan karakter geokimia organiknya. Batubara diekstraksi soxhlet dengan diklorometanametanol 937 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 946-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-945 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.
ABSTRACT
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 diclorometanemethanol 937 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 946-amyrin during diagenesis of Angyospermae higher plants. Analyzed of ketones fraction Sawahlunto coal shown presence of iso and anteiso-alkan-2-one and isoprenoid ketones. These compound were expected formed by oxidation of 945-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.
Source Undergraduate Theses of Chemistry, RSKi 553.2 Ula k, 2015
Coverage ITS Community
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