Karakteristik Geokimia Organik Melalui Analisis Biomarka Fraksi Hidrokarbon Aromatik Pada Batubara JT-02 Formasi Ngrayong, Cekungan Jawa Timur Bagian Utara

Safitri, Eka Anisa (2024) Karakteristik Geokimia Organik Melalui Analisis Biomarka Fraksi Hidrokarbon Aromatik Pada Batubara JT-02 Formasi Ngrayong, Cekungan Jawa Timur Bagian Utara. Other thesis, Intitut Teknologi Sepuluh Nopember.

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Abstract

Telah dilakukan karakterisasi geokimia organik melalui analisis biomarka fraksi hidrokarbon aromatik pada batubara JT-02, Formasi Ngrayong, Cekungan Jawa Timur bagian Utara. Penelitian ini bertujuan untuk mengetahui potensi batubara JT-02 dalam menghasilkan gas (gas prone) dan sumber gas batubaranya melalui aspek sumber bahan organik dan kematangan termal. Analisis biomarka dilakukan dengan ekstraksi soxhlet, fraksinasi dan identifikasi struktur biomarka menggunakan Kromatografi Gas-Spektrometri Massa (KG-SM). Hasil analisis menunjukkan kondisi batubara dengan kematangan rendah yang ditandai oleh kelimpahan kadalena [6] yang sangat tinggi. Selain itu, ditemukan keberadaan senyawa dinoroleana-1,3,5(10),12-tetraena [13], dinoroleana-1,3,5(10)-triena [14], 1,2,4a,9-tetrametil-1,2,3,4,4a,5,6,14b-oktahidropisena [16] dan 2,2,4a,9-tetrametil-1,2,3,4,4a,5,6,14b-oktahidropisena [17] yang menandakan sampel geologi masih pada tahapan awal diagenesis. Sumber bahan organik dalam batubara ini adalah dari tumbuhan tingkat tinggi terestrial Angiospermae. Sampel batubara JT-02, Formasi Ngrayong, Cekungan Jawa Timur bagian Utara termasuk Kerogen tipe III yang memiliki potensi dalam menghasilkan gas (gas prone).
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Organic geochemistry characterization by biomarker analysis of aromatic hydrocarbon fraction in JT-02 coal, Ngrayong Formation, Northern East Java Basin has been conducted. This study aims to determine the potential of JT-02 coal in producing gas (gas prone) and its coal gas source through aspects of organic material sources and thermal maturity. Biomarker analysis was carried out by soxhlet extraction, fractionation and biomarker structure identification using Gas Chromatography-Mass Spectrometry (KG-SM). The results of the analysis showed a low-maturity coal condition characterized by a very high abundance of cadalene [6]. In addition, the presence of dinoroleane-1,3,5(10),12-tetraene [13], dinoroleane-1,3,5(10)-triene [14], 1,2,4a,9-tetramethyl-1,2,3,4,4a,5,6, 14b-octahydropisene [16] and 2,2,4a,9-tetramethyl-1,2,3,4,4a,5,6,14b-octahydropisene [17] which indicates that the geological samples are still in the early stages of diagenesis. The source of organic matter in this coal is from terrestrial higher plants of Angiospermae. Coal sample JT-02, Ngrayong Formation, Northern East Java Basin is a type III Kerogen that has the potential to produce gas (gas prone).

Item Type:	Thesis (Other)
Uncontrolled Keywords:	batubara, biomarka, formasi Ngrayong, hidrokarbon aromatik aromatic hydrocarbons, biomarkers, coal, Ngrayong formation
Subjects:	Q Science Q Science > QD Chemistry
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Eka Anisa Safitri
Date Deposited:	11 Sep 2024 04:17
Last Modified:	11 Sep 2024 04:17
URI:	http://repository.its.ac.id/id/eprint/115621

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