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All Journal IJOG : Indonesian Journal on Geoscience Buletin Sumber Daya Geologi Karimah Tauhid Indonesian Journal of Forestry Research
Ramdhani, Muhammad Rizki
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Neuroscience Social Sciences

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Characteristic Analysis of Indonesian Low and Medium Rank Coals and Their Influence on Carbon Dioxide Adsorption Capacity Ramdhani, Muhammad Rizki; Yan Rizal R; Sigit Arso Wibisono; Soleh Basuki Rahmat; Muhammad Abdurachman Ibrahim; Eko Budi Cahyono
Indonesian Journal on Geoscience Vol. 11 No. 3 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.3.391-407

Abstract

Indonesia has great deep-seated coal potential , such as Lakat coal and Muaraenim coal, which can be utilized as a medium for Carbon Capture and Storage (CCS). These coals vary in characteristic which affects their ability to adsorb or store carbon dioxide gas (CO2). The moisture content of the Lakat coal is less than that of the Muaraenim coal, while the ash content of Lakat coal is 4-5 times higher than the Muaraenim coal. Lakat coal contains more vitrinite content than Muaraenim coal, while Muaraenim coal contains more inertinite content than Lakat coal. The CO2 gas adsorption capacity of Muaraenim coal is 37.62 cc/g which higher than Lakat coal (31.56 cc/g) on dry ash-free basis. The adsorbed CO2 is negatively correlated with vitrinite reflectance, ash content, and moisture content in both coals. The correlation between maceral composition (vitrinite and inertinite content) and adsorbed CO2 content differs between these coals. These analyses will support the CCS/CCUS study in deep seated coal seams by providing the information of CO2 maximum holding capacity in coal and their relationship to its chemical and organic composition.
EVALUASI POTENSI BATUBARA UNTUK UNDERGROUND COAL GASIFICATION PADA LUBANG BOR JWT-02, DAERAH AMPAH, KABUPATEN BARITO TIMUR, PROVINSI KALIMANTAN TENGAH Dwitama, Eska Putra; Ramdhani, Muhammad Rizki; Firmansyah, Fajar; Purnomo, Wawang Sri
Buletin Sumber Daya Geologi Vol 12 No 3 (2017): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v12i3.50

Abstract

Potensi batubara Indonesia, baik yang dapat ditambang secara terbuka maupun yang ada di bawah permukaan (kedalaman >100m), sebagian besar merupakan batubara peringkat rendah. Salah satu pemanfaatan batubara peringkat rendah adalah gasifikasi bawah permukaan. Data dan evaluasi awal tentang potensi batubara untuk kegiatan gasifikasi ini sangat diperlukan. Evaluasi potensi batubara untuk gasifikasi ini pada Lubang Bor JWT-02 telah dilakukan dengan parameter evaluasi antara lain, kedudukan/kedalaman batubara, ketebalan batubara, karakteristik batubara, batuan pengapitnya dan sumber daya batubara. Hasil evaluasi tersebut menunjukkan adanya potensi lapisan batubara yang dapat dikembangkan untuk gasifikasi bawah permukaan. 
Peningkatan PBB P-2 di Kota Bogor Pasca Keputusan Wali Kota Bogor Nomor 900/Kep.283-Bag.Ekon/2021 Tentang Digitalisasi Daerah Ramdhani, Muhammad Rizki; Danu Suryani; Rizal Syamsul Ma’arif
Karimah Tauhid Vol. 4 No. 9 (2025): Karimah Tauhid
Publisher : Universitas Djuanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30997/karimahtauhid.v4i9.21430

Abstract

Perkembangan ilmu pengetahuan dan teknologi telah memberikan kesempatan bagi pemerintah pusat maupun pemerintah daerah untuk melaksanakan tanggung jawab mereka sebaik mungkin. Salah satu peluang dalam mendukung kinerja Pemerintah adalah kemajuan teknologi dalam bentuk digitalisasi berbagai kegiatan termasuk transaksi ataupun penerimaan pajak. Namun dalam pelaksanaannya seringkali terjadi kelemahan baik dalam sisi sistem ataupun pada sisi pengunaannya, penelitian ini bertujuan menjawab berbagai rumusan masalah yaitu pelaksanaan Pemungutan PBB P-2 Kota Bogor Pasca Kepwali Kota Soal Tim, Bogor Nomor 900/Kep.283-Bag.Ekon/2021 Percepatan dan Perluasan Digitalisasi Daerah Kota Bogor dan Dampak Digitalisasi Daerah dalam pemungutan PBB P-2 di Kota Bogor. Dengan menggunakan metode penelitian yuridis normatif disertai kajian empiris sederhana dengan melakukan wawancara sederhana. Hasil penelitian terdapat penurunan pendapatan pajak melalui PBB P-2 di Kota Bogor namun terdapat peningkatan pada jumlah Nomor Objek Pajak (NOP), Kemudian perlunya pembinaan kepada tenaga kerja Bapenda Kota Bogor dalam memaksimalkan teknologi informasi dan telekomunikasi karena kecanggihan teknologi memiliki dampak yang signifikan dalam meningkatkan penerimaan pajak, serta perlunya kekonsistenan dalam kinerjanya dalam pemungutan pajak secara digital. Hal ini perlu dipertimbangkan guna mengoptimalkan pertumbuhan pendapatan pajak guna meningkatkan Pendapatan Asli Daerah (PAD), yang digunakan untuk membiayai pembangunan Kota Bogor dan meningkatkan kesejahteraan masyarakat
IMAGING TROPICAL PEATLAND AND AQUIFER POTENTIAL IN SOUTH SUMATERA USING ELECTRICAL RESISTIVITY TOMOGRAPHY Ramdhani, Muhammad Rizki; Ruhimat, Acep; Wiyono, Wiyono; Barnes, Ahmad
Indonesian Journal of Forestry Research Vol. 7 No. 1 (2020): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2020.7.1.1-14

Abstract

Indonesia has one of the largest tropical peatland areas in the world. In Sumatra Island, peatland is spread over 11 areas and it was mainly found in Riau (60.1%) and South Sumatra (19.6 %) Provinces. This study investigates the subsurface of tropical peatland in Ogan Komering Ilir Regency, South Sumatra Province. Data was recorded using Electrical Resistivity Tomography (ERT) method based on the sub-surface images of tropical peatland. This study was conducted based on dipole-dipole configuration with 72 channels spread. This paper also studies the physical properties (thickness and electrical resistivity) of peatland and its substrate using ERT. In this study the ERT section and the geological map identified Alluvium (Qs), Kasai Formation, and the Basement. Result shows the ERT is applicable for imaging the thickness of tropical peatland and other geological features (Aquifer, geological structures, and stratigraphy). The electrical resistivity of peat varies from 20 ohm meter to 120 ohm meter and the thickness of peat varies from 2–5 meter. In some ERT sections, the basement was identified from 130 meter to 170 meter beneath the surface. The aquifer sweet spots were located from ERT Sections combined with the hydrogeological map. The aquifer was identified in Kasai Formation. The thickness of the aquifer layer is 2–20 meter. These physical properties may support the peatland conservation (forest fire mitigation) and geotechnical analysis purposes.
Co-Authors Barnes, Ahmad Dwitama, Eska Putra Eko Budi Cahyono Firmansyah, Fajar Muhammad Abdurachman Ibrahim Purnomo, Wawang Sri Rizal Syamsul Ma’arif Ruhimat, Acep Sigit Arso Wibisono Soleh Basuki Rahmat Suryani, Danu Wiyono wiyono Yan Rizal R