Identifikasi Karakteristik Batubara Melalui Analisis Proksimat dan Petrografi pada PT XYZ Provinsi Kalimantan Utara
Abstract
Abstract. Coal is a sedimentary rock derived from fossilized plants that have decomposed over millions of years so that they contain combustible elements. The elements in question are carbon (C), hydrogen (H), oxygen (O), and other additional elements such as sulfur (S), nitrogen (N), and other elements. The coal formation process is influenced by temperature, pressure, and geological time. So that coal has different characteristics, and these characteristics will affect the quality of coal The purpose of this research is to determine the characteristics of coal based on proximate and petrographic analyses. This research consists of several stages, namely petrographic analysis by making polished incision samples to determine the composition of maseral and mineral constituents of coal under a microscope and proximate analysis to determine the quality of coal. In addition, the determination of the deposition environment based on the maserals content of coal using the classification according to Diessel, 1992. Based on the results of the study, it is found that the characteristics of coal in the research area have an average moisture content (IM) of 26.3% (adb), an average ash content of 5.8% (adb), an average fly matter content (VM) of 38.72% (adb), tethered carbon (FC) of 28.53% (adb), and mineral matter reaching 15.2%.
Abstrak. Batubara yaitu batuan sedimen yang berasal dari fosil tumbuhan yang terdekompoisi selama berjuta-juta tahun sehingga mengandung unsur yang mudah terbakar. Unsur yang dimaksud berupa karbon (C), hidrogen (H), oksigen (O), dan unsur tambahan lainnya seperti belerang (S), Nitrogen (N) dan unsur lainnya. Proses pembentukan batubara dipengaruhi oleh suhu, tekanan, waktu geologi. Sehingga batubara memiliki karakteristik yang berbeda – beda dan karakteristik tersebut akan mempengaruhi kualitas dari batubara. Tujuan dari penelitian ini untuk mengetahui karakteristik batubara berdasarkan analisis proksimat dan petrografi. Penelitian ini terdiri dari beberapa tahapan yang dilakukan ini yaitu analisis petrografi dengan membuat sampel sayatan poles untuk mengetahui komposisi maseral dan mineral penyusun batubara dibawah mikroskop serta analisis proksimat untuk mengetahui kualitas batubara. Selain itu, dilakukan penentuan lingkungan pengendapan berdasarkan kandungan maseral batubara menggunakan klasifikasi menurut Diessel, 1992. Berdasarkan dari hasil penelitian didapatkan bahwa karakteristik batubara pada daerah penelitian memiliki kadar air (IM) rata – rata sebesar 26,3% (adb), kadar abu (Ash) rata – rata 5,8% (adb), kadar zat terbang (VM) rata – rata 38,72% (adb), karbon tertambat (FC) rata – rata 28,53% (adb) dan mineral matter mencapai 15,2%.
References
American Society for Testing and Materials., 2006, “ASTM D2798-06: Standard Test Method for Microscopical Detemination of the Vitrinite Reflektance of Coal”, USA.
Arif, Irwandy., 2014. “Batubara Indonesia”. PT Gramedia Pustaka Utama. Jakarta.
ASTM D 7582-15., 2015, “Standard Test Methods for Proximate Analysis of Coal and coke by Coke Macro Thermogravimetric Analysis”, Annual book of ASTM.
ASTM D 2798-20., 2020,” Standard Test Method fot Microscopical Determination of the Vitrinite Reflectance of Coal”, Annual book of ASTM.
Calder, J. H., Gibling, M. R., D., & Mukopadhyay, P. K., 1991, “Peat formation in a Westphalian B piedmont setting, Cumberland Basin, Nova Scotia : implications for the maceral-based interpretation of rheotrophic and raised paleomires”, Bulletin de La Societe Geologique de France, 162/2, p. 283–298.
Baihaqi, A., Susilawati, R., Fauzielly, L., dan Muljana, B., I., 2017, “Studi perbandingan karakteristik kimia dan petrografi batubara lapangan x, Cekungan Sumatera Selatan dan lapangan y Cekungan Sumatera Tengah, Indonesia”, Buletin Summer Daya Geologi, 12, 87-102, Pusat Sumber Daya Mineral Batubara dan Panas Bumi, Bandung
Cook, A. C., 1982, “The origin and petrology of organic matter in coal, oil shales and petroleum source rocks”, University of Wollongong, Wollongong, New South Wales.
Diessel, C.F.K., 1992, “Coal-Bearing Depositional Systems”. Springer-Verlag, Berlin Heidelberg.
Diessel, C.F.K., 1986, “On the Correlation Between Coal Facies and Depositional Environmets”, Proceedings of the 20th Sydney Basin Symposium, Department of Geology, University of Newcastle, 19-22.
Horne, J., 1978, “Depositional Models in Coal Exploration and Mine Planning in Appalanchian Region., Vol 62, pp. 2379-2411.
International Committee for Coal and Organic Petrology (ICCP)., 2001, “The New Inertinite Classification (ICCP System 1994)”, Fuel Vol. 80, 459-471 p.
Lamberson, M.N., Bustin, R.M dan Kalkreuth, W., 1991, “Lithotype (maceral) composition and variation as correlated with paleo-wetland environments”, Gates Formation, northeastern British Columbia, Canada, International Journal of Coal Geology, 18, 87-124.
Stach, E., M, -TH, Mackowsky., M, Teichmuller., G, H, Taylor., D, Chandra., dan R, Teichmuller., 1982, “Coal Petrology”, Berlin: Gebrüder Borntraeger.
Misra BK, Singh BD., 1994, “Susceptibility to spontaneous combustion of Indian coals and lignites: an organic petrographic autopsy”, Int J Coal Geol 25:265–286.
Pasymi., 2008, “Batubara (jilid-1)”, Padang: Bung Hatta University Press.
Teichmuller, M., 1989, “The genesis of coal from the viewpoint of coal petrology”. In: P.C. Lyons and B. Alpern (Editors), Peat and Coal: Origin, Facies and Depositional Model. Int. J. Coal Geol., 12: 1-87.
Thomas, L., 2013, “Coal Geology Second Edition”, Chichester, West Sussex, UK: Wiley-Blackwell.
Qadaryati, N., Praditya, D. T., & Hidajat, W. K., 2019, “Penentuan Lingkungan Pengendapan Batubara Berdasarkan Karakteristik dan Maseral Batubara di PT X, Kabupaten Nunukan, Kalimantan Utara”, Jurnal Geosains Dan Teknologi Volume 2 No.3
Fungky Suhayadi and Sriyanti, “Kajian Lingkungan Pengendapan Berdasarkan Karakteristik Batubara Formasi Pulau Balang,” Jurnal Riset Teknik Pertambangan, pp. 1–8, Jul. 2022, doi: 10.29313/jrtp.v2i1.779.
Yodi Kurniawan, Elfida Moralista, and Zaenal, “Penentuan Remaining Service Life Struktur Conveyor B pada Tambang Batubara PT XYZ,” Jurnal Riset Teknik Pertambangan, pp. 1–6, Jul. 2023, doi: 10.29313/jrtp.v3i1.786.
E. I. Akbar, Dono Guntoro, and R. M. Ulfa, “Karakterisasi Batubara untuk Underground Coal Gasification di Daerah Sekayu Musi Banyuasin,” Jurnal Riset Teknik Pertambangan, pp. 117–124, Dec. 2022, doi: 10.29313/jrtp.v2i2.1315.
