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All Journal METAMORFOSA Journal of Biological Sciences Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal Master Pariwisata (JUMPA) Jurnal RISET Geologi dan Pertambangan Jurnal Geocelebes Jurnal Teknologi Mineral dan Batubara Journal of Geoscience, Engineering, Environment, and Technology BULLETIN OF THE MARINE GEOLOGY Buletin Sumber Daya Geologi Jurnal Geosains dan Teknologi Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan KURVATEK Academia Praja : Jurnal Ilmu Politik, Pemerintahan dan Administrasi Publik Budapest International Research and Critics Institute-Journal (BIRCI-Journal): Humanities and Social Sciences Indonesian Journal on Geoscience Indonesian Journal on Geoscience Journal of Applied Sciences, Management and Engineering Technology (JASMET) Berita Sedimentologi Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Teknologi Mineral dan Batubara Journal of Geosciences and Applied Geology
Budi Muljana
Fakultas Teknik Geologi, Universitas Padjadjaran
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Journal : KURVATEK

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THE IMPACT OF TOTAL MOISTURE AND ASH ON CALORIFIC VALUE: COAL RESEARCH IN BERAU SUB-BASIN, EAST KALIMANTAN Sugiarto, Wahyu; Muljana, Budi; Syafri, Ildrem; Rizal, Yan; Prasetya, Muhammad Nurul Huda
KURVATEK Vol 10 No 1 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i1.5519

Abstract

Coal quality is one of the key factors in determining the effectiveness of processing and utilization. Coal quality assessment involves analyzing physical and chemical aspects to determine its characteristics. Coal quality is also influenced by geological conditions at the mining site, which affect the quality and amount of carbon in the coal. To ensure consistency, it is necessary to implement coal quality control based on physical and chemical parameters from the mining process in the pit to storage in the stockpile. Analysis of the effect of total moisture and ash on the calorific value of coal is the purpose of this study. The method used is a ROM (Run of Mine) coal sample located at the stockpile location. The relationship between Total Moisture and the calorific value of coal shows a negative linear correlation where the influence value for a 1% increase in Total Moisture is -71.343 kcal/kg and so is between Ash and the calorific value of coal 1% increase in Ash is -82.588 kcal/kg, which shows a negative linear correlation. Total Moisture increases by 1%, reducing the calorific value of coal by 71 kcal/kg, and increasing Ash content by 1% reduces the calorific value of coal by 83 kcal/kg.
TIPE INTERVAL T2- HUMMOCKY PADA ENDAPAN BADAI (TEMPESTIT), FORMASI NANGGULAN, PEGUNUNGAN KULON PROGO, YOGYAKARTA Nuraini, siti; Syafri, Ildrem; Muljana, Budi; Sudradjat , Adjat
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i2.5800

Abstract

The composition of storm deposit layers (tempestites) is described as a normal sedimentary deposit or fining upward-deposit, divided into 3 units: the lower part, the middle part, and the upper part. The lower part is characterized by coarse clastics, the middle part known as T2 consists of a combination of hummocky and swalley layers containing finer clastics with good sorting. The upper part shows deposition of layering in increasingly calm current conditions with fine clastics: clay. The T2 interval is often considered a characteristic of turbidite deposit models due to gravity flow. However, on the other hand, the nature of storm-induced currents (hummocky-swalley) is more varied due to the role of 3 controlling currents: oscillatory currents, bottom currents, and combined currents. This study will investigate the characteristics of storm interval T2 (tempestites) in the Nanggulan Formation. The method applied is to generate stratigraphic sections for 3 sections (Kali Clumprit, Watupuru, and Songgo), age correlation and of paleocurrents analysis. Storm deposits are found in the Middle Eocene-aged Nanggulan Formation, showing a polymodal direction with opposing and branching within T2 interval. This pattern reflects two opposing directions: bottom currents and storm oscillatory currents. On the other hand, a combination current emerges, branching off from the main current pattern. The T2 Watupuru layer consists of overlapping hummocky layers that extend in a northwestward direction, indicating an ancient coastal or land area.
Co-Authors Abdurrokhim Abdurrokhim ⠀ Adi Hardiyono, Adi Adjat Sudradjat Adlan, Ryandi Agus Didit Haryanto -, Agus Didit Haryanto Al Suwaidi, Aisha Ali, Mohammed Andi Agus Nur Andi Agus Nur, Andi Agus Andriana S, Yoga Andriana S, Yoga Asep Bahtiar Purnama Asep Bahtiar Purnama Astriandhita, Karina Melias Azmi Baihaqi Baihaqi, Azmi Baihaqi, Azmi Bastira, Shahnaz Noveta Binarko Santoso Budiana, Rahmat Catur Purwanto Catur Purwanto, Catur Dadang Suganda Dadang Suganda Dewandra Bagus Eka Putra Dewandra Bagus Eka Putra, Dewandra Bagus Eka Djadjang Jedi Setiadi Emi Sukiyah Fauziah Hanum Fauziah Hanum Febriwan Mohammad, Febriwan Fercanza, Frisdio Fikri Muhammad Fiqih Hadian, M. Sapari Dwi Hadian, Mohammad Sapari Dwi Hendarmawan Hendarmawan Hendarmawan, Hendarmawan Herman Darman Ildem Syafri Ildrem Sjafri Ildrem Syafri Ildrem Syafri Iyan Haryanto J. T. van Gorsel Karina Melias Astriandhita Kuntadi Nugrahanto Kuntadi Nugrahanto Nugrahanto kurnianto, brany Laranarko, Dwandari Lathifah, Lista Ummu Fadzilatul Lia Jurnaliah LILI FAUZIELLY Lili Fauzielly Luli Gustiantini M. Sapari Dwi Hadian Mohamad Sapari Hadian Morad, Sadoon Mudiarsono Mudiarsono Muhammad Kurniawan Alfadli Muhammad Zulfikar Muslin, Dicky Nana Sulaksana Naufal, Muhammad Audy Nazar Nurdin Noor Cahyo Dwi Aryanto Nuraini , Siti Nurdradjat, . Nurdrajat Nurdrajat Osvaldus, Rodrigo Prahastomi, Mochammad Praptisih Praptisih Praptisih, . Prasetya, Muhammad Nurul Huda Purna Sulastya Putra Purna Sulastya Putra, Purna Sulastya Rahmat Fakhrudin -, Rahmat Fakhrudin Ratih C. F. Ratumanan Reiza D. Dienaputra Reza Muhammad Ganjar Gani, Reza Muhammad Ganjar Rina Zuraida Rita Susilawati Rizki Satria Rachman Rizki Satria Rachman Rudy Suhendar Sangmin Hyun Santosa, Ardian Aby Sayaf, Ival Umar Setiawan, Taat Shahnaz Noveta Bastira Shaska R. Zulivandama Silti Salinita Siti Nuraini Sudirman Sudirman Sudradjat , Adjat Suganda, Wingky Suhendar, Rudy Susilawati, Rita Susilawati, Rita Swasty Aninda Piranti Syaiful Alam Syaiful Alam Taat Setiawan Teddy Tresnanto Tresnanto, Teddy Tresnanto, Teddy Undang Mardiana Vijaya Isnaniawardhani Wahyu Sugiarto Winantris Winantris Winantris Winantris Yan Rizal, Yan Yoga A. Sendjadja Yoga Andriana S Yoga Andriana Sendjaja Yudha S. Subarna Yuspian Djapani Yuyun Yuniardi Yuyun Yuniardi -, Yuyun Yuniardi