Garuda - Garba Rujukan Digital

STRATEGY TO MAXIMIZING THE USE OF COAL AND ASSOCIATED GASEOUS FUELS IN SOUTH SUMATERA BASIN BUKIN DAULAY; DATIN F. UMAR; BINARKO SANTOSO; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13, No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010
Publisher : Puslitbang tekMIRA

South Sumatera Basin has been known as one of the most promising sedimentary basins in Indonesia. This basin has large coal resources and is currently also believed to have an enormous amount of coalbed methane (CBM) resources. The coal seam in the basin is considerably thick and continuous, low ash and sulphur contents and could be found at favourable depth for CBM development. Coal seams can be ex- ploited by traditional mining methods, which are open cut and underground minings. When the coal seam is not economic to exploit using traditional method, underground coal gasification (UCG) technology could be implemented to optimize the use of coal and associated gaseous fuels in the basin. However, CBM operation has to be conducted before UCG operation. South Sumatera coal could be utilized for direct combustion in mine site in order to reduce transport cost; could be upgraded to obtain high calorific value coal or converted to gas, liquid and coke fuels through gasification, liquefaction and carbonization technologies.

THE INFLUENCE OF STEAM DRYING PROCESS ON COMBUSTION BEHAVIOR OF INDONESIAN LOW-RANK COALS Datin Fatia Umar; Suganal Suganal; Ika Monika; Gandhi Kurnia Hudaya; Dahlia Diniyati
Indonesian Mining Journal Vol 23, No 2 (2020): INDONESIAN MINING JOURNAL, Vol. 23 No. 2, October 2020
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol23.No2.2020.1105

Steam drying process of the Low Rank Coals (LRCs) has been conducted to produce coal which is comparable with the High Rank Coal (HRC). Characterization of the raw and dried coals was carried out through proximate, ultimate, calorific value, Fourier Transform Infrared (FTIR) spectroscopy and Thermo Gravimetry-Differential Thermal Analysis (TG-DTA) to study the combustion behavior of the coals. This study used Indonesian low rank coals coming from Tabang (TKK coal) and Samurangau (SP coal), East Kalimantan. The results indicate that the calorific value of the dried coals increases significantly due to the decrease in moisture content of the coal. The FTIR spectrums show that the methylene-ethylene (RCH3/CH2) and aromaticity-aliphaticity ratios (Rar/al) of the dried coals increased while the ratio of RCO/ar decreased which reflect that the rank of the coals increased equivalent to the high rank coal (bituminous). Meanwhile, the TG-DTA indicates that the ignition temperature (Tig) and combustion rate (Rmax) of the dried coals increased. This analysis expresses that the dried coals produced by steam drying process have better combustion behavior due to the higher calorific value than those of the raw coals.

EVALUATION OF IRON ORE FROM SOUTH KALIMANTAN AND TAILING OF PT. FREEPORT AS CATALYST PRECURSORS FOR DIRECT COAL LIQUEFACTION MIFTAHUL HUDA; HERMANU PRIJONO; NINING S. NINGRUM; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13, No 1 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 1 February 2010
Publisher : Puslitbang tekMIRA

Research on catalyst derived from minerals for coal liquefaction reaction remains attractive since Indonesia has various kinds of minerals which are suitable to be used as catalyst precursors. In this research, iron ore from South Kalimantan and tailing of PT. Freeport were examined their activities to find the most suitable catalyst precursor for coal liquefaction reaction. Experiments were performed using a 0.5 litre batch type autoclave equipped with a horizontal shaking unit (54 times per minute) at reaction temperature, initial hydrogen pressure and reaction time of 400oC, 10 MPa and 1 hr, respectively. The result showed that tailing produced lower oil yield and coal conversion than those of iron ore. Tailing is suspected to experience slower hydrogen transfer rate during coal liquefaction since it produced larger pyrrhotite crystal size than that of iron ore.

UTILIZATION OF COAL ACTIVATED CARBON AS ADSORBENT AMMONIUM WITH THE HIGH CONCENTRATION Ika Monika; Suganal Suganal; Fahmi Sulistyohadi
Indonesian Mining Journal Vol 18, No 3 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 3 October 2015
Publisher : Puslitbang tekMIRA

Ammonium adsorption process carried out by batch system, with making 208-233 mg/L concentration of am- monium solution. In the adsorption batch systems, particle size of activated carbon -8 + 12 mesh and -16 + 20 mesh was added into 200 ml ammonium solution with the weight of 20, 40, 60 and 80 g, and a contact time respectively 30, 60, 120, 180 and 1440 minutes (24 hours). During the adsorption, stirring to optimize adsorp- tion is conducted regularly. The activated carbon used in this research consist of two types are coal based activated carbon and coconut shell activated carbon. Coal activated carbon has a surface area 196.7 m2/g and 643.0 m2/g. While coconut shell activated carbon has a surface area of 59.6 m2/g and 985.9 m2/g. Results of the adsorption process showed that coal activated carbon with a surface area of 643, 0 m2/g have the same capability ammonium adsorption with coconut shell activated carbon with a surface area of 985.9 m2/g. These results showed that a both types of activated carbon can be used optimally for the removal ammonium with percentage of adsorption reaches more than 90%.

UTILIZATION OF COAL ACTIVATED CARBON AS ADSORBENT AMMONIUM WITH THE HIGH CONCENTRATION Ika Monika; Suganal Suganal; Fahmi Sulistyohadi
Indonesian Mining Journal Vol 18 No 3 (2015): INDONESIAN MINING JOURNAL Vol. 18 No. 3 October 2015
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol18.No3.2015.260

Ammonium adsorption process carried out by batch system, with making 208-233 mg/L concentration of am- monium solution. In the adsorption batch systems, particle size of activated carbon -8 + 12 mesh and -16 + 20 mesh was added into 200 ml ammonium solution with the weight of 20, 40, 60 and 80 g, and a contact time respectively 30, 60, 120, 180 and 1440 minutes (24 hours). During the adsorption, stirring to optimize adsorp- tion is conducted regularly. The activated carbon used in this research consist of two types are coal based activated carbon and coconut shell activated carbon. Coal activated carbon has a surface area 196.7 m2/g and 643.0 m2/g. While coconut shell activated carbon has a surface area of 59.6 m2/g and 985.9 m2/g. Results of the adsorption process showed that coal activated carbon with a surface area of 643, 0 m2/g have the same capability ammonium adsorption with coconut shell activated carbon with a surface area of 985.9 m2/g. These results showed that a both types of activated carbon can be used optimally for the removal ammonium with percentage of adsorption reaches more than 90%.

STRATEGY TO MAXIMIZING THE USE OF COAL AND ASSOCIATED GASEOUS FUELS IN SOUTH SUMATERA BASIN BUKIN DAULAY; DATIN F. UMAR; BINARKO SANTOSO; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13 No 3 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 3 October 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No3.2010.518

South Sumatera Basin has been known as one of the most promising sedimentary basins in Indonesia. This basin has large coal resources and is currently also believed to have an enormous amount of coalbed methane (CBM) resources. The coal seam in the basin is considerably thick and continuous, low ash and sulphur contents and could be found at favourable depth for CBM development. Coal seams can be ex- ploited by traditional mining methods, which are open cut and underground minings. When the coal seam is not economic to exploit using traditional method, underground coal gasification (UCG) technology could be implemented to optimize the use of coal and associated gaseous fuels in the basin. However, CBM operation has to be conducted before UCG operation. South Sumatera coal could be utilized for direct combustion in mine site in order to reduce transport cost; could be upgraded to obtain high calorific value coal or converted to gas, liquid and coke fuels through gasification, liquefaction and carbonization technologies.

EVALUATION OF IRON ORE FROM SOUTH KALIMANTAN AND TAILING OF PT. FREEPORT AS CATALYST PRECURSORS FOR DIRECT COAL LIQUEFACTION MIFTAHUL HUDA; HERMANU PRIJONO; NINING S. NINGRUM; SUGANAL SUGANAL
Indonesian Mining Journal Vol 13 No 1 (2010): INDONESIAN MINING JOURNAL Vol. 13 No. 1 February 2010
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol13.No1.2010.538

Research on catalyst derived from minerals for coal liquefaction reaction remains attractive since Indonesia has various kinds of minerals which are suitable to be used as catalyst precursors. In this research, iron ore from South Kalimantan and tailing of PT. Freeport were examined their activities to find the most suitable catalyst precursor for coal liquefaction reaction. Experiments were performed using a 0.5 litre batch type autoclave equipped with a horizontal shaking unit (54 times per minute) at reaction temperature, initial hydrogen pressure and reaction time of 400oC, 10 MPa and 1 hr, respectively. The result showed that tailing produced lower oil yield and coal conversion than those of iron ore. Tailing is suspected to experience slower hydrogen transfer rate during coal liquefaction since it produced larger pyrrhotite crystal size than that of iron ore.

THE INFLUENCE OF STEAM DRYING PROCESS ON COMBUSTION BEHAVIOR OF INDONESIAN LOW-RANK COALS Datin Fatia Umar; Suganal Suganal; Ika Monika; Gandhi Kurnia Hudaya; Dahlia Diniyati
Indonesian Mining Journal Vol 23 No 2 (2020): INDONESIAN MINING JOURNAL, Vol. 23 No. 2, October 2020
Publisher : Balai Besar Pengujian Mineral dan Batubara tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/imj.Vol23.No2.2020.1105

Steam drying process of the Low Rank Coals (LRCs) has been conducted to produce coal which is comparable with the High Rank Coal (HRC). Characterization of the raw and dried coals was carried out through proximate, ultimate, calorific value, Fourier Transform Infrared (FTIR) spectroscopy and Thermo Gravimetry-Differential Thermal Analysis (TG-DTA) to study the combustion behavior of the coals. This study used Indonesian low rank coals coming from Tabang (TKK coal) and Samurangau (SP coal), East Kalimantan. The results indicate that the calorific value of the dried coals increases significantly due to the decrease in moisture content of the coal. The FTIR spectrums show that the methylene-ethylene (RCH3/CH2) and aromaticity-aliphaticity ratios (Rar/al) of the dried coals increased while the ratio of RCO/ar decreased which reflect that the rank of the coals increased equivalent to the high rank coal (bituminous). Meanwhile, the TG-DTA indicates that the ignition temperature (Tig) and combustion rate (Rmax) of the dried coals increased. This analysis expresses that the dried coals produced by steam drying process have better combustion behavior due to the higher calorific value than those of the raw coals.

Title

Found 8 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 8 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 8 Documents
Search