Karakterisitik Geokimia Organik Melalui Analisis Biomarka Fraksi Aromatik Batubara JT-01 Formasi Ngrayong, Jatirogo, Jawa Timur

Melinda, Desi (2024) Karakterisitik Geokimia Organik Melalui Analisis Biomarka Fraksi Aromatik Batubara JT-01 Formasi Ngrayong, Jatirogo, Jawa Timur. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Analisis biomarka hidrokarbon aromatik sampel Batubara JT-01 Formasi Ngrayong, Jatirogo, Jawa Timur dilakukan dengan metode ekstraksi, fraksinasi, dan identifikasi dengan Gas Chromatography-Mass Spectrometry (GC-MS) untuk mengetahui karakteristik geokimia organik. Hasil identifikasi menunjukkan keberadaan berbagai senyawa biomarka seperti seskuiterpenoid (kalamena, kadalena, dan norkadalena), aromatik sesterpenoid (3,4,7-trimetil-1,2,3,4-tetrahidrokrisena, fenantren, des-A-dinoreleana-5,7,9,11,13-pentaena), triterpenoid aromatik pentasiklik (dinoroleana-1,3,5(10),12-tetraena, dinoroleana-1,3,5(10)-triena), dan aromatik alkil benzena (1-metil-2-(4-metilheptil) benzena). Keberadaan senyawa-senyawa ini menunjukkan bahwa sumber bahan organik batubara berasal dari tumbuhan tingkat tinggi, khususnya Angiospermae, yang mengalami proses diagenesis di lingkungan oksidatif. Selain itu, senyawa seperti kalamena dan 5,6,7,8-tetrahidrokadalena menunjukkan karakteristik kematangan rendah, yang mendukung bahwa batubara ini belum mengalami proses termal yang intens. Senyawa-senyawa ini merupakan indikator penting dalam menentukan kematangan geokimia batubara. Penemuan senyawa-senyawa tersebut menunjukkan karakteristik kerogen tipe III, yang umumnya berasal dari material tumbuhan darat dan yang mengarah kepada pembentukan gas (gas-prone). Potensi ini didukung oleh dominasi senyawa yang menunjukkan karakteristik lingkungan oksidatif dan masukan bahan organik dari tumbuhan tingkat tinggi. Melalui hasil yang diperoleh, maka Batubara JT-01 dari Formasi Ngrayong , Jatirogo, diduga berpotensi menghasilkan gas (gas prone).
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Analysis of aromatic hydrocarbon biomarkers in the JT-01 coal sample from the Ngrayong Formation, Jatirogo, East Java was conducted using extraction, fractionation, and identification methods with Gas Chromatography-Mass Spectrometry (GC-MS) to determine organik geochemical characteristics. The identification results indicate the presence of various biomarker compounds such as sesquiterpenoids (calamenene, cadalene, and norcadalene), aromatic sesterterpenoids (3,4,7-trimethyl-1,2,3,4-tetrahydrochrysene, phenanthrene, des-A-dinoroleane-5,7,9,11,13-pentaene), pentacyclic aromatic triterpenoids (dinoroleane-1,3,5(10),12-tetraene, dinoroleane-1,3,5(10)-triene), and alkyl benzene aromatics (1-methyl-2-(4-methylheptyl) benzene). The presence of these compounds indicates that the organik matter source of the coal originates from higher plants, particularly Angiosperms, which underwent diagenesis in an oxidative environment. Additionally, compounds such as calamenene and 5,6,7,8-tetrahydrocadalene show low maturity characteristics, supporting that this coal has not undergone intense thermal processes. These compounds are important indicators in determining the geochemical maturity of the coal. The discovery of these compounds indicates Type III kerogen characteristics, which typically derive from terrestrial plant material and lead to gas formation (gas-prone). This potential is supported by the dominance of compounds indicating oxidative environmental characteristics and input from higher plant organik matter. Thus, this study concludes that the JT-01 coal from the Ngrayong Formation, Jatirogo, has the potential for gas generation (gas-prone).

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Batubara JT-01, Biomarka Aromatik, Gas Prone, Geokimia Organik, Kerogen Tipe III, JT-01 Coal, Aromatic Biomarkers, Gas Prone, Organik Geochemistry, Type III Kerogen
Subjects:	Q Science > QD Chemistry > QD251.2 Chemistry, Organic. Biochemistry
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Desi Melinda
Date Deposited:	12 Aug 2024 02:11
Last Modified:	29 Aug 2024 02:04
URI:	http://repository.its.ac.id/id/eprint/114571

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