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KARAKTERISTIK BATUBARA DAN PENGARUHNYA TERHADAP PROSES PENCAIRAN Talla, Harli; Amijaya, Hendra; Harijoko,, Agung; Huda, Miftahul
REAKTOR Volume 14, No. 4, OKTOBER 2013
Publisher : REAKTOR

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Abstract

AbstractCHARACTERISTIC OF COAL AND ITS EFFECT ON LIQUEFACTION PROCESS. Thisresearch was conducted to study the influence of coal characteristic to liquefaction by using catalytichydrogenation method. Coal sample used are Sorong coal which has lignite coal rank and Mulia coalwith rank sub bituminous. Liquefaction process is conducted in an autoclave with 5 litre capacities,antrasen is used as solvent and iron ore as catalyst. Temperature variation is 375ºC, 400ºC, 425ºC,450ºC, whereas hydrogen blank-off pressure is specified at 100 bars. Results show that Coalcharacteristic has a significant influence to liquefaction. The highest conversion of Sorong coal is89.94% at temperature of 400ºC and Mulia coal highest conversion is 87.28% at temperature of450ºC.Keywords: catalytic hidrogenation method; coal ccharacteristic; Mulia coal; Sorong coalAbstrakTujuan penelitian ini adalah mempelajari pengaruh karakteristik batubara terhadap proses pencairandengan menggunakan metoda hidrogenasi katalitik. Sampel batubara yang digunakan adalahbatubara Sorong dengan peringkat lignit dan batubara Mulia dengan peringkat sub bituminus. Prosespencairan dilakukan dalam sebuah otoklaf yang berkapasitas 5 liter dengan menggunakan pelarutantrasen dan katalis bijih besi. Kisaran suhu pencairan adalah 375ºC, 400ºC, 425ºC, dan 450ºC,sementara tekanan awal hidrogen ditetapkan 100 bar. Hasil yang diperoleh menunjukan bahwakarakteristik batubara memiliki pengaruh yang signifikan terhadap pencairan. Konversi tertinggibatubara Sorong adalah 89,94% pada suhu 400ºC, sementara untuk batubara Mulia sebesar 87,28%pada suhu 450ºC.Kata kunci: metode hidrogenasi katalitik; karakteristik batubara; batubara Mulia;batubara Sorong
KARAKTERISTIK BATUBARA DAN PENGARUHNYA TERHADAP PROSES PENCAIRAN Talla, Harli; Amijaya, Hendra; Harijoko,, Agung; Huda, Miftahul
REAKTOR Volume 14, No. 4, OKTOBER 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (328.086 KB) | DOI: 10.14710/reaktor.14.4.267-271

Abstract

Tujuan penelitian ini adalah mempelajari pengaruh karakteristik batubara terhadap proses pencairan dengan menggunakan metoda hidrogenasi katalitik. Sampel batubara yang digunakan adalah batubara Sorong dengan peringkat lignit dan batubara Mulia dengan peringkat sub bituminus. Proses pencairan dilakukan dalam sebuah otoklaf yang berkapasitas 5 liter dengan menggunakan pelarut antrasen dan katalis bijih besi. Kisaran suhu pencairan adalah 375ºC, 400ºC, 425ºC, dan 450ºC, sementara tekanan awal hidrogen ditetapkan 100 bar. Hasil yang diperoleh menunjukan bahwa karakteristik batubara memiliki pengaruh yang signifikan terhadap pencairan. Konversi tertinggi batubara Sorong adalah 89,94% pada suhu 400ºC, sementara untuk batubara Mulia sebesar 87,28% pada suhu 450ºC
Geochemistry of Natural Gas Seepages in Boto Area, Bancak, Semarang, Central Java Amijaya, Hendra; Pameco, Pracoyo Adi
Indonesian Journal on Geoscience Vol 4, No 2 (2017)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6994.364 KB) | DOI: 10.17014/ijog.4.2.61-70

Abstract

DOI: 10.17014/ijog.4.2.61-70Three seepage gas samples collected from Boto Area, Bancak, Semarang, Central Java, were studied to determine their chemical characteristics using GC and GC-IRMS methods. They are composed 53 - 85% of methane predominantly. However, gas seep Site 3 sample has the highest N2 compound and the lesser extent to the samples Site 2 and Site 1 respectively. The two hydrocarbon gas seeps (Site 1, 2, and Site 3 samples) that are characterized by δ13C methane of -35.61‰ and -27.97‰, and values of δD methane of -112‰ and -109‰ respectively, are each isotopically distinct from all others suggesting, at least, they are derived from different maturity level. The Site 3 gas sample is suggested to be more mature than the others.
CHARACTERISTICS AND LIQUEFACTION OF COAL FROM WARUKIN FORMATION, TABALONG AREA, SOUTH KALIMANTAN–INDONESIA Nursanto, Edy; Idrus, Arifudin; Amijaya, Hendra; Pramumijoyo, Subagyo
Journal of Applied Geology Vol 5, No 2
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6447.449 KB) | DOI: 10.22146/jag.7211

Abstract

Since the coal characteristic is the main controlling factors in coal liquefaction, thus five coal seams with different coal rank from Warukin Formation in Tabalong Area, South Kalimantan have been used in this study. Three seams were low rank coal (Wara 110, Wara 120, Wara 200) while two seams were medium rank (Tutupan 210 and Paringin 712). The objectives of this study was to investigate the effect of coal rank on the rate of coal conversion factor. Coal liquefaction was conducted in an autoclave on low pressure (14.7 psi) and temperature 120°C. Experiments were designed with time intervals 30, 60 and 90 minutes, respectively. The average coal properties of seam Wara 110, Wara 120 and Wara 200 were 26.65%, 5.08%, 46.26% and 30.60% for inherent moisture, ash content, volatile matter and. fixed carbon, respectively. In contrast, coal properties for seam Tutupan 210 and Paringin 712 were 18.42%, 1.81%, 23.02% and 35.76% for inherent moisture, ash content, volatile matter and fixed carbon, respectively. The maximum yields for Wara 110, Wara 120 and Wara 200 were 48.60% (30 minutes), 51.27% (60 minutes) and 46.72% (90 minutes). In comparison, Tutupan 210 and Paringin 712 resulted maximum yields of 8.22% (30 minutes), 18.35% (60 minutes), 6.23% (90 minutes). In conclusion, low rank coal has higher yield conversion compared to medium rank coal since it has higher H/C ratio. Keywords: Coal liquefaction, low rank coal, Kalimantan.
Integration of GIS modeling with Fuzzy Logic method for land optimization of post mining on coal mine in South Kalimantan province: A case study of PT Wahana Baratama Mining Anis, Mohamad; Idrus, Arifudin; Amijaya, Hendra; Subagyo, Subagyo
Sriwijaya Journal of Environment Vol 2, No 3 (2017): Low Land
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22135/sje.2017.2.3.62-66

Abstract

Currently coal companies, especially in South Kalimantan, have not been yet or only slightly entered the post-mining stage, although part of the mining blocks have been totally exploited, so that the company should have been preparing for the development of other sectors (non-mining). It shows that optimization of coal resources from exploration, mining to post-mining land use is necessary to ensure sustainable mining and sustainable development in terms of meeting the conservation aspect. To meet all aspects of conservation, the achievement of optimization in a series of mining business activities is started from the potential optimization of the potential of the coal remain resources until the optimization of post-mining land use is absolutely required. This research has analyzed several alternative sectors outside mining, which will be selected for optimization of utilization or post-mining land use, including plantation, recreation, industry and conservation sectors. The analyzing process used several parameters to assess the selected sector including rainfall, slope and land use. Therefore, this study uses an approach of GIS-based methods (knowledge-driven), mainly fuzzy logic for post-mining land use planning. The selected mining area for this study belongs to PT. Wahana Baratama Mining company that has a Work Agreement for Coal Mining Exploitation. The result shows the suitability of plantation for the optimization of land use in all mining sites and also for conservation areas or protected forests.Keywords: Optimization, Land use, Post-mining, Fuzzy logic.
Utilizing coal remaining resources and post-mining land use planning based on GIS-based optimization method : study case at PT Adaro coal mine in South Kalimantan Anis, Mohamad; Idrus, Arifudin; Amijaya, Hendra; Subagyo, Subagyo
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 2 (2017): JGEET Vol 02 No 02 : June (2017)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24273/jgeet.2017.2.2.307

Abstract

Coal mining activities may cause a series of environmental and socio-economic issues in communities around the mining area. Mining can become an obstacle to environmental sustainability and a major hidden danger to the security of the local ecology. Therefore, the coal mining industry should follow some specific principles and factors in achieving sustainable development. These factors include geological conditions, land use, mining technology, environmental sustainability policies and government regulations, socio-economic factors, as well as sustainability optimization for post-mining land use. Resources of the remains of the coal which is defined as the last remaining condition of the resources and reserves of coal when the coal companies have already completed the life of the mine or the expiration of the licensing contract (in accordance with government permission). This research uses approch of knowledge-driven GIS based methods mainly Analytical Hierarchy Process (AHP) and Fuzzy logic for utilizing coal remaining resources and post-mining land use planning. The mining area selected for this study belongs to a PKP2B (Work Agreement for Coal Mining) company named Adaro Indonesia (PT Adaro). The result shows that geologically the existing formation is dominated by Coal Bearing Formation (Warukin Formation) which allows the presence of remains coal resource potential after the lifetime of mine, and the suitability of rubber plantation for the optimization of land use in all mining sites and also in some disposal places in conservation areas and protected forests.
Basin Evolution Palispatic Model of Bonaparte Basin, Australia Northwest Shelf Ricardo, Nomensen; Amijaya, Hendra; Husein, Salahuddin
Journal of Applied Geology Vol 2, No 2 (2017)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.39988

Abstract

This research area is located on the Australian NW Shelf close to the westernedge of the Sahul Platform. This research is aimed to generate the palispatic basin model of Bonaparte Basin, Australian Northwest Shelf. It is to predict the impact of Neogene collision on the petroleum system distribution on Australian Northwest Shelf. The main data used in this research are seismic data using qualitative method analysis. The well data is used to well-seismic tied. After data acquisition, the seismic data are interpreted based on the horizon and structure interpretation. These interpretation are to reconstruct the basin evolution thorough geologic time. According to data analysis, the basin evolution palispatic model are divided into Paleo-proterozoic, Paleozoic, Triassic, Early Jurassic, Middle Jurassic, Late Jurassic, Early Cretaceous, Late Cretaceous, Early Eocene, Late Miocene and Recent condition. Regional tectonically there are at least three important events in NW Shelf: Middle Triassic-Jurassic NNE–SSW extension phase, Late Jurassic NE–SW extension phase and the Neogen collision phase; the Neogen collision effects on Northwest Shelf Australia. These three events contributed in forming and disturbing the Paleozoic and Mesozoic petroleum system in Bonaparte basin especially.
FUZZY LOGIC APPROACH FOR POST-MINING LAND USE PLANNING: A CASE STUDY ON COAL MINE OF PT. ADARO INDONESIA-SOUTH KALIMANTAN Anis, Mohamad; Idrus, Arifudin; Amijaya, Hendra; Subagyo, Subagyo
Indonesian Mining Journal Vol 20, No 2 (2017): INDONESIAN MINING JOURNAL VOL. 20 NO. 2 October 2017
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (888.757 KB) | DOI: 10.30556/imj.Vol20.No2.2017.371

Abstract

Currently coal companies, especially in South Kalimantan, have not yet been or only slightly entered the post-mining stage, although part of the mining blocks have been totally exploited, so that the company should have been preparing for the development of other sectors (non-mining). It shows that optimization of coal resources from exploration, mining to post-mining land use is necessary to ensure sustainable mining and sustainable development in terms of meeting the conservation aspect. To meet all aspects of conservation, the achievement of optimization in a series of mining business activities is started from the potential optimization of the coal remain resources until the optimization of post-mining land use is absolutely required. This research has analyzed several alternative sectors outside mining, which will be selected for optimization of utilization or post-mining land use, including plantation, recreation, industry and conservation sectors. The analyzing process used several parameters to assess the selected sectors including rainfall, slope and land use. Therefore, this study uses an approach of GIS-based methods (knowledge-driven), mainly fuzzy logic for post-mining land use planning. The selected mining area for this study belongs to PT. Adaro Indonesia company that has a Work Agreement for Coal Mining Exploitation. The result shows the suitability of plantation for the optimization of land use in all mining sites and also for conservation areas or protected forests. 
PERBANDINGAN PEROLEHAN BATUBARA CAIR (YIELD) ANTARA BATUBARA RANK RENDAH DENGAN RANK MENENGAH PADA BATUBARA FORMASI WARUKIN, KAB. TABALONG, KALIMANTAN SELATAN Nursanto, Edy; Idrus, Arifudin; Amijaya, Hendra; Pramumijoyo, Subagyo
Jurnal Teknologi Technoscientia Vol 6 No 1 (2013): Vol 6 No 1 Agustus 2013
Publisher : LPPM IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (341.941 KB)

Abstract

Research focusing on the quality of coal in Warukin Formation has been conducted in coal outcrops located on Tabalong area, particularly in 3 coal seams, namely, Wara 120 which is low rank coal, then Tutupan 210 and Paringin 712 which consist of medium rank coal. The average coal quality for seam Wara 120  consist of inherent moisture (IM): 26.65%, whereas for ash and volatile matter (VM) is (ash:5.08%; VM=43.98%). Beside that for fixed carbon (FC) is 24.29%. Meanwhile for seam Tutupan 210 consist of inherent moisture (IM) is 18.42%, ash:1.81%, FC: 33,88% and Paringin 712 consist of inherent moisture (IM) is 16.84%, ash:1.36% VM: 23.02% and FC: 35.76%. Coal liquefaction is conducted of coal -200 mesh(1g) in an autoclave on low pressure and temperature. Pressure during the process is 14 psi and temperature is 120oC. Research was designed by using time variable, respectively, 30 60, 90 minutes.  Conversion result gained will be associated with the length of yield process. The aim on the coal liquefaction process is coal liquid. The process is conducted on the time variables of 30, 60 and 90 minutes with following results: seam  Wara 120 is 35,76% (30 minute),40.68% (60 minute), 31.15% (90 minute).  Then Tutupan 210 and Paringin seam are 7,64% (30 minute): 14,51% (60 minute), 4,53% (90 minute) and 3,21% (30 minute): 9.57% (60 minute), 1,71% (90 minute). Due to characteristic of coal that Wara 120 seam have H/C ratio higher than Tutupan 210 and Paringin 712, so the average result of yield shows that coals in Wara has higher yield conversion than coals in seam Tutupan and Paringin.  
FUZZY LOGIC APPROACH FOR POST-MINING LAND USE PLANNING: A CASE STUDY ON COAL MINE OF PT. ADARO INDONESIA-SOUTH KALIMANTAN Anis, Mohamad; Idrus, Arifudin; Amijaya, Hendra; Subagyo, Subagyo
Indonesian Mining Journal Vol 20, No 2 (2017): INDONESIAN MINING JOURNAL VOL. 20 NO. 2 October 2017
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (888.757 KB) | DOI: 10.30556/imj.Vol20.No2.2017.371

Abstract

Currently coal companies, especially in South Kalimantan, have not yet been or only slightly entered the post-mining stage, although part of the mining blocks have been totally exploited, so that the company should have been preparing for the development of other sectors (non-mining). It shows that optimization of coal resources from exploration, mining to post-mining land use is necessary to ensure sustainable mining and sustainable development in terms of meeting the conservation aspect. To meet all aspects of conservation, the achievement of optimization in a series of mining business activities is started from the potential optimization of the coal remain resources until the optimization of post-mining land use is absolutely required. This research has analyzed several alternative sectors outside mining, which will be selected for optimization of utilization or post-mining land use, including plantation, recreation, industry and conservation sectors. The analyzing process used several parameters to assess the selected sectors including rainfall, slope and land use. Therefore, this study uses an approach of GIS-based methods (knowledge-driven), mainly fuzzy logic for post-mining land use planning. The selected mining area for this study belongs to PT. Adaro Indonesia company that has a Work Agreement for Coal Mining Exploitation. The result shows the suitability of plantation for the optimization of land use in all mining sites and also for conservation areas or protected forests.