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Journal articles on the topic 'Lignite Indonesia'

Author: Grafiati

Published: 10 December 2022

Last updated: 31 July 2025

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1

Liu, Ming Qiang, Jian Zhong Liu, Yu Jie Yu, Zhi Hua Wang, Jun Hu Zhou, and Ke Fa Cen. "Investigation of Lignite Combustion Characteristics with Thermal Analysis." Advanced Materials Research 614-615 (December 2012): 25–30. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.25.

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Combustion characteristics of three types of lignite (coming from Indonesia, Ximeng, Hami), and a bituminous coal from Shenfu were studied by thermogravimetric analysis (TGA). Combustion parameters including characteristic temperatures, maximum rate of combustion, combustion performance index and activation energy of samples were analyzed. Kinetic parameters of samples were calculated using Jander model. The results showed that the characteristic temperatures of lignite samples are lower than that of bituminous coal. Indonesian lignite has the best combustion performance and the lowest activat

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2

KANDUČ, Tjaša, та Miloš MARKIČ. "Isotopic composition of carbon (δ13C) and nitrogen (δ15N) of petrologically different Tertiary lignites and coals". Geologija 67, № 1 (2024): 105–28. http://dx.doi.org/10.5474/geologija.2024.006.

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This study investigates the carbon (δ13Corg) and nitrogen (δ15N) isotopic composition of tertiary lignites and coals from six sedimentary basins: Velenje, Mura-Zala, and Zasavje in Slovenia; Sokolov in Czech Republic, Barito in Indonesia; and Istria in Croatia. The aim is to investigate the correlation between the fine detrital (fD) component and δ13C and δ15N in Velenje lignite samples. Additionally, we aim to evaluate the biogeochemical processes of organic substances during their deposition in all analyzed samples, calculate their δ13CCO2 values and compare the analyzed values of δ13C and δ

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3

Hamdani, Ahmad Helman, and Agus Didit Haryanto. "The Spontaneous Combustion Potency of Lignite Coal Based on FTIR." European Journal of Environment and Earth Sciences 3, no. 5 (2022): 37–40. http://dx.doi.org/10.24018/ejgeo.2022.3.5.326.

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To understand the role of functional groups in the spontaneous combustion of lignite coal, the distribution of functional groups in the lignite coal of the Sajau Formation in the Berau Basin, Indonesia, was studied. The functional group characterization was carried out using the Fourier Transform Infra Red (FTIR) method. The results revealed the presence of four functional groups, namely hydroxyl structures, aliphatic structures, oxygen-containing structures, and aromatic structures. The lignite contained more hydroxyl and oxygen-bearing functional groups, from which aliphatic and aromatic; th

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4

Zhao, Zhen Ning, and Qin Feng Zhang. "Burning Blended Coal of Indonesia Lignite and Vietnam Anthracite on a Face-Fired 600MW Boiler Original Designed for Bituminous Coal." Advanced Materials Research 347-353 (October 2011): 167–73. http://dx.doi.org/10.4028/www.scientific.net/amr.347-353.167.

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Elemental research of burning blended coal of Indonesia Lignite and Vietnam anthracite on a face-fired 600MW supercritical boiler is performed, which is original designed for burning high-quality bituminous coal. Maximum ratio of Vietnam anthracite can be 40 percent. With the increase of the ratio of the anthracite, the size of residue particles and the ratio of unburned carbon in residues (UBCRs) rise up markedly, the slag formation of Indonesia Lignite alleviate. The results reveal: the burnout of anthracite is more difficult than its ignition, the key way to solve this problem is to control

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5

Mar, Kyu Kyu, Dwikorita Karnawati, Doni Prakasa Eka Putra, Sarto, Toshifumi Igarashi, and Carlito Baltazar Tabelin. "ARSENIC ADSORPTION PERFORMANCE OF LIGNITE IN LABORATORY COLUMN EX PERIMENTS UNDER SATURATED FLOW CONDITIONS." ASEAN Engineering Journal 4, no. 2 (2013): 41–52. http://dx.doi.org/10.11113/aej.v4.15450.

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This paper presents the adsorption behavior of arsenic (As) onto lignite in saturated column experiments under various flow rates and adsorbent thicknesses. The lignite sample originated from Indonesia is predominantly composed of organic matter with minor amounts of pyrite (FeS2). Arsenic content of lignite is 1.8 mg/kg with high sulfur content of 10.8 wt. %. The experiments were performed at room temperature using a glass column with an inner diameter of 2.4 cm and total length of 30 cm. Different lignite bed thicknesses (6 and 12 cm) at a constant flow rate of 0.85 cm3/min and a fixed ligni

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6

Nursanto, Edy, Dessyanto Prasetyo, Bambang Supriyanta, et al. "Accuracy of Self-Heating Modeling in Coal Stockpiles in the Warukin Formation, South Kalimantan, Indonesia." Iraqi Geological Journal 58, no. 1C (2025): 15–24. https://doi.org/10.46717/igj.58.1c.2ms-2025-3-17.

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The study aims to improve the accuracy of self-heating prediction of lignite-A coal from the Warukin Formation by comparing modeling and actual temperature measurements. Modeling with COMSOL Multiphysics® predicts the temperature on day 30 of 468 K, while the actual temperature is 507.65 K. The modeling equation (Tpred) is 1.33 times time and added 412.50, while the actual equation (Tobs) is 2.16 times time and added 441.07. The high correlation coefficient (r) is 0.95, the Mean Absolute Error is 16.81 K, and the Root Mean Square Error is 20.48 K. The average relative error of the model is 0.0

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Julismi, Rusdianasari, and Abu Hasan. "Syngas Underground Coal Gasification (UCG) Testing of In-Situ Type Lignite Coal and Fracture Type Coal." International Journal of Research in Vocational Studies (IJRVOCAS) 1, no. 2 (2021): 67–78. http://dx.doi.org/10.53893/ijrvocas.v1i2.42.

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The advancement and utilization of technology require energy, namely electricity and fuel energy. The increasing cost of fossil energy, the scarcity of non-renewable energy sources and the increasing energy demand requires diversification of energy resources. One of the new renewable energy sources currently being developed in Indonesia is Underground Coal Gasification (UCG). UCG is a new technology that utilizes unmined coal. In the UCG process, coal is burned underground and the syngas produced is collected through bore wells for processing or direct use. The resulting syngas is analyzed to

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8

Ernawati, Ernawati, Muhammad Natsir, and Mansyur Asri. "The impact of final demand on energy sectors' interregional output." Jurnal Perspektif Pembiayaan dan Pembangunan Daerah 11, no. 5 (2023): 371–88. http://dx.doi.org/10.22437/ppd.v11i5.25044.

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This study investigates the influence of aggregate demand on the interregional energy sector in Indonesia, aiming to ascertain whether the proximity of regions impacts the demand within the energy sector. Utilizing data from the Input-Output Indonesia Interregional Table, this research encompasses six regions: Sumatra, Java, Bali & Nusa Tenggara, Kalimantan, Sulawesi, and Maluku & Papua. The energy sectors analyzed include oil, gas & geothermal mining, coal & lignite mining, coal industry & oil, gas refinery, and electricity and gas procurement & ice production. Finding

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Puteri, Gina Chynthia Kamarudin, Roni Ridwan, and Ellin Harlia. "Ecological Diversity of Microbial Consortium Feces of Beef Cattle and Lignite Coal." HAYATI Journal of Biosciences 27, no. 3 (2020): 180. http://dx.doi.org/10.4308/hjb.27.3.180.

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Increasing energy demand is not alongside the availability of limited fossil fuels. Alternative and renewable energy sources are not only an option to overcome energy problems but also essential to minimize global warming. Another critical and promising renewable energy source is biomass-derived from livestock feces. Beef cattle feces contain a microorganism consortium that can be used as a starter with coal media to form biogas. Indonesia recently developed coal waste processing into renewable energy, such as biogas. This study aimed to overview the ecological diversity of microbial consortiu

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10

Riasetiawan, Mardhani, Ferian Anggara, Vanisa Syahra, et al. "Coal rank data analytic for ASTM and PSDBMP classification." International Journal of Innovative Research and Scientific Studies 6, no. 2 (2023): 374–80. http://dx.doi.org/10.53894/ijirss.v6i2.1469.

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The large amount of coal production in Indonesia generates a significant amount of data that can be used to understand the rank of the coal. To effectively process and interpret this data, our study employs the use of big data techniques, including big data management and big data analysis. Big data management allows us to organize and understand the data patterns, while big data analysis is used to gain insights and knowledge about the data, such as coal rank analysis and identifying the type of coal. Our study uses a python-based approach to define variables and automatically classify the co

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11

Mar, K. K., D. Karnawati, Sarto, D. P. E. Putra, T. Igarashi, and C. B. Tabelin. "Comparison of Arsenic Adsorption on Lignite, Bentonite, Shale, and Iron Sand from Indonesia." Procedia Earth and Planetary Science 6 (2013): 242–50. http://dx.doi.org/10.1016/j.proeps.2013.01.033.

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Efendi, M. Ade Andriansyah, N. Nurhadi, and P. Phiciato. "The effects of hydrothermal dewatering on Indonesia lignite characteristics for fixed-bed gasification." International Journal of Coal Preparation and Utilization 40, no. 2 (2017): 146–54. http://dx.doi.org/10.1080/19392699.2017.1383245.

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13

Gantina, T. M., P. Iriani, and A. S. Kurniasetiawati. "The potential of liquid fuel production from lignite using bio-solubilization method in Indonesia." IOP Conference Series: Materials Science and Engineering 830 (May 19, 2020): 022021. http://dx.doi.org/10.1088/1757-899x/830/2/022021.

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14

Farid, Muhammad, Teuku Muhammad Faiz Nuzullah, Zatul Aklya, et al. "Optimizing Energy Consumption Prediction Across the IMT-GT Region Through PCA-Based Modeling." Infolitika Journal of Data Science 3, no. 1 (2025): 31–39. https://doi.org/10.60084/ijds.v3i1.286.

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This study aims to improve the accuracy of energy consumption prediction in the Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT) region by addressing multicollinearity among independent variables such as energy production (Mtoe), lignite coal production (million tons), crude oil production (million tons), refined oil production (million tons), natural gas production (billion cubic meters), and electricity production (terawatt-hours). By integrating Principal Component Analysis (PCA) with Random Forest (RF), six correlated variables were reduced into two uncorrelated principal components (P

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15

Stankiewicz, B. Artur, Michael A. Kruge, and Maria Mastalerz. "A geochemical study of macerals from a Miocene lignite and an Eocene bituminous coal, Indonesia." Organic Geochemistry 24, no. 5 (1996): 531–45. http://dx.doi.org/10.1016/0146-6380(96)00038-1.

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16

Wang, Wei, and D. V. Griffiths. "Case study of slope failure during construction of an open pit mine in Indonesia." Canadian Geotechnical Journal 56, no. 5 (2019): 636–48. http://dx.doi.org/10.1139/cgj-2017-0662.

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This paper presents back-analyses of a failed slope at an open pit lignite mine in Muara Enim, Indonesia. The slope, which was being raised by the dumping of excavated material, failed at a dump height of 24 m, well before reaching the design height of 80 m. The primary cause of failure was determined to be the presence of a previously unknown weak layer in the foundation, combined with high excess pore pressures generated by a relatively fast dumping rate. The failure resulted in significant disruption of the mining operation, in addition to environmental problems and a high cost of remediati

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17

Nurrahman, Arif, Edwin Permana, Diah Riski Gusti, and Intan Lestari. "Pengaruh Konsentrasi Aktivator Terhadap Kualitas Karbon Aktif dari Batubara Lignit." Jurnal Daur Lingkungan 4, no. 2 (2021): 44. http://dx.doi.org/10.33087/daurling.v4i2.86.

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Activated carbon has been widely used in everyday life. One of them is in water purification. Materials for making activated carbon have been made and researched. Coal is one of the materials that can be processed into activated carbon. The availability of coal in Indonesia is quite abundant and has the potential to be used as activated carbon. The coal used is lignite. This coal is categorized as light coal where its use is only used as fuel in industry. It is hoped that the activated carbon from this coal will become an alternative source of coal use in Indonesia. Activated carbon from coal

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18

Suparmono. "Determine competitiveness of Indonesian export commodities using static and dynamic revealed comparative analysis." Journal of Economic Info 8, no. 2 (2021): 88–100. http://dx.doi.org/10.31580/jei.v8i2.1833.

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The government continues to promote non-oil and gas exports because oil and gas exports have continued to decline since the decades of the 90s. Main commodity products are still dominated by primary products such as mining, agriculture and some low technology manufactured products. This results in low added value of the product. Indonesia needs products that are highly competitive in the international market. This article aims to analyze the level of competitiveness of Indonesian products in world trade. The analytical tool used is the static revealed comparative advantage (SRCA) and dynamic r

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19

Ngatijo, Syamsurizal, and M. Damris. "Biochar Amendment for the Immobilization of Manganese and Cadmium in the Soils of Abandoned Coal Mining in Jambi, Indonesia." Journal of Computational and Theoretical Nanoscience 17, no. 7 (2020): 3190–93. http://dx.doi.org/10.1166/jctn.2020.9159.

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High heavy metal contents in soil of abandoned coal mining pose a risk to the environment. Acidic conditions impose a potential mobilization and availability of toxic heavy metals to water body. The objective of this study was to reduce mobilization of manganese and cadmium in the soil by amending lignite base biochar. The immobilization was investigated in a fixed bed column experiment in which concentrations of the metals in aliquot after the column were compared. Demineralized water adjusted to pH 4.7 to mimic environmental condition was pumped up through the column and the aliquots were co

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20

Suparmono, Suparmono, Edi Suandana, and Fauzan Ilmas. "Determining Competitiveness of Indonesian Export Commodities using Revealed Comparative Analysis." Jurnal Ekonomi & Studi Pembangunan 23, no. 1 (2022): 66–80. http://dx.doi.org/10.18196/jesp.v23i1.13557.

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This article aims to analyze Indonesian products’ competitiveness in the global market using the static revealed comparative advantage (SRCA) and the dynamic revealed comparative advantage (DRCA). DRCA is considered superior to RCA because it takes into account the time element. The current research combines DRCA and RCA to provide an analytical comparison. The data were collected from the International Trade Centre, classified according to the Harmonized System (HS) from 2013 to 2019. Using SRCA, Indonesia’s tin and articles’ competitiveness only contributes 0.95% of Indonesia's total exports

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21

Amalia Renata Anggraeni, Sigit Puji Winarko, and Erna Puspita. "Analysis of The Influence Between Mining, Agriculture and Processed Product Exports on Indonesia's Sales Development in International Trade in the Time Frame 2019-2022." International Journal of Management Research and Economics 2, no. 2 (2024): 254–69. http://dx.doi.org/10.54066/ijmre-itb.v2i2.1824.

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Exports are one of the international trade activities that provide benefits to Indonesia, including capital transactions, employment, and foreign exchange reserves. There are 2 types of exports, namely oil and gas and non-oil and gas exports. The value of non-oil and gas exports tends to be higher than oil and gas exports. So this research focuses on three non-oil and gas sectors, which consist of mining, agriculture, and processing industry (processed products). The purpose of this study is to determine the effect of mining, agriculture, and processed product exports on Indonesia's sales in i

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22

Syafrullah, Syafrullah. "Lignite-based Organic Fertilizer Improves Soil Quality and Yield of Rice in Belitang South Sumatera." JOURNAL OF TROPICAL SOILS 24, no. 3 (2019): 109. http://dx.doi.org/10.5400/jts.2019.v24i3.109-117.

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To achieve food-self sufficiency in Indonesia, it is necessary to apply sustainable agriculture practices to improve soil quality. Most of paddy fields have been applied with chemical fertilizers intensively for more than 40 years without the addition of organic matter. The purpose of this study was to understand the effects of lignite-based organic fertilizer application on the quality of paddy soil and yield of rice. The study was conducted in April until August 2014 in the irrigated rice fields in Belitang, Ogan Komering Ulu Timur District. The study was arranged in a Factorial Randomized B

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Effendi, Dahrul, Asep Kurnia Permadi, Doddy Abdassah, and Bambang Widarsono. "THE EFFECT OF RUMEN FLUID APPLICATION ON VARIOUS COAL TYPES IN METHANE PRODUCTION." Rudarsko-geološko-naftni zbornik 40, no. 1 (2025): 165–78. https://doi.org/10.17794/rgn.2025.1.12.

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Indonesia is one of the largest coal producers in the world. The conversion of coal into coalbed methane (CBM) by involving methane-producing microbes appears to be a potential alternative to utilizing coal for energy resources. One possible source of methanogens is rumen fluid collected from slaughterhouse waste. Previous studies have reported the possibility of employing rumen fluid to produce methane from coals. To sustain field application, microbiological testing of rumen fluid in CBM reservoir circumstances is required. Therefore, various water formations and coals were involved in the p

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Soleh, Mochamad, Yudi Hidayat, and Rita Triani. "Urban Waste Management Solution through SRF Cofiring in Coal-Fired Power Plants." IOP Conference Series: Earth and Environmental Science 1354, no. 1 (2024): 012038. http://dx.doi.org/10.1088/1755-1315/1354/1/012038.

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Abstract Solid Recovery Fuel (SRF) is a highly effective waste product processed through sorting and separation from non-combustible materials in Indonesia. The SRF is then dried to increase its calorific value and ensure homogeneity. Most Indonesian SRF is derived from urban waste, which is predominantly organic material, making it comparable to biomass and having a calorific value akin to lignite coal. The state-owned electricity company, PLN, collaborates with local governments responsible for waste management to utilize SRF as a fuel source in coal-fired power plants through cofiring. This

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Zahra, Khalda Az, Ahmad Helman Hamdani, and R. Tina Rosmalina. "Paleoenvironmental Implications from Biomarker Investigations on the Pliocene Lower Sajau Lignite Seam in Kasai Area, Berau Basin, Northeast Kalimantan, Indonesia." Journal of Geoscience and Environment Protection 03, no. 05 (2015): 140–52. http://dx.doi.org/10.4236/gep.2015.35016.

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Li, Dongfang, Xiwei Ke, Hairui Yang, et al. "The ash formation and attrition characteristics of an Indonesia lignite coal ash for a 550 MWe ultra supercritical CFB boiler." Chemical Engineering Research and Design 147 (July 2019): 579–86. http://dx.doi.org/10.1016/j.cherd.2019.05.027.

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27

Laurence and Josephine Kasena. "Case study of life cycle assessment on battery container." E3S Web of Conferences 74 (2018): 05005. http://dx.doi.org/10.1051/e3sconf/20187405005.

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Every year, the total of plastic industry in Indonesia grows rapidly. Not only giving positive effects on economic, but industrial development also causing a negative impact on the environment. Those negative impacts are caused by inefficiently using of resources and industrial waste which could pollute the environment. Therefore, it is necessary to calculate the impact itself by using the Life Cycle Assessment (LCA) method. The LCA could help us to take better decision to improve the production process and products which could minimize the energy consumption and resources. PT XYZ is a plastic

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Ayuningsih, Putri Sekar, Sutrisno Dipl.Seis, Tati Zera, and Nur Hidayat S.T, M,Si. "Identification of Characteristics and Distribution of Subsurface Coal Using the 2D Geoelectric Method in Tanjung Palas Timur District, North Kalimantan." Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 5, no. 1 (2022): 33–45. http://dx.doi.org/10.15408/fiziya.v5i2.23106.

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Based on regional geology, Tanjung Palas Timur Subdistrict is included in the only formation, which includes coal seams. The depletion of oil and gas energy sources in Indonesia results in the need for other alternative energy sources, one of which is coal. This study aims to determine the characteristics of coal in the study area. This research was conducted in Tanjung Palas Timur Subdistrict, North Kalimantan using the geoelectric resistivity method with a pole-pole configuration and 8 tracks which are divided into 2 track blocks. The resistivity geoelectric method is used because it is very

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Fitrawan, M., Sufriadin, and S. Widodo. "Mineral Matter Analysis on Coal and Flanking Rocks in the Bulupoddo District, Sinjai Regency, South Sulawesi Province, Indonesia." IOP Conference Series: Earth and Environmental Science 1134, no. 1 (2023): 012029. http://dx.doi.org/10.1088/1755-1315/1134/1/012029.

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Abstract South and West Sulawesi has coal resources of about 117 million tons or about 0.35% of the total resources nationally. Bulupoddo coal located in Sinjai Regency is a type of coal that is categorized as low rank coal. This study was conducted to identify the minerals contained in coal and its flanking rock (roof and floor) and determine the rank and quality of coal. The methods used are mineralogy and coal quality analysis methods. Field observations shows a type of coal that is about 50 cm thin and flanked by clay and sandstone. The results of microscope and XRD analysis (X-Ray Diffrac

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Randa, Abigail Brenda Pasorong, Erwin Agung Nur Rohmat, Lisda Oktaviana, Muhammad Hafiz Albab, and Fitri Kartiasih. "Impact of Coal Export Decline on East Kalimantan's Mining and Coal Industry." Journal of Developing Economies 10, no. 1 (2025): 151–72. https://doi.org/10.20473/jde.v10i1.61414.

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Two of Indonesia’s top export commodities are coal and lignite. However, there is a decrease in the value of coal exports in 2023. The province in Indonesia with the biggest coal reserves is East Kalimantan. This study aims to examine the condition of the mining and coal industry and its relationship with other industries, determine the leading sectors, and assess the impact of the decline in coal exports on the economy of East Kalimantan. The input-output and gross regional domestic product tables for East Kalimantan in 2016 and 2023 are used in the analysis. This study found that even though

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Mangestiono, Wiji. "PEMBUATAN PROTOTIPE PENGERING BATUBARA UNTUK MENGURANGI MOISTURE CONTENT PADA PLTU." Gema Teknologi 18, no. 1 (2014): 46. http://dx.doi.org/10.14710/gt.v18i1.8814.

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Wiji Mangestiono, in paper prototype development of coal dryer to reduce moisture content on power plant explain that the percentage of coal use in the power industry in Indonesia has increased during the period of the last ten years. This policy is taken by the government by at least two considerations, namely: the higher world oil prices so that the price of electricity per kwh increase in addition Indonesia itself is the world's largest coal producer with serial number to six so that the transfer of fuel oil to the coal is considered very right. There is a fundamental problem that must be o

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Wenas, Ari Akbariyanto, and Toto Hardianto. "Pengaruh Torefaksi terhadap Pencucian Potassium dalam Konversi Tandan Kosong Kelapa Sawit menjadi Bahan Bakar Padat Ramah Lingkungan." JMPM (Jurnal Material dan Proses Manufaktur) 5, no. 2 (2022): 123–40. http://dx.doi.org/10.18196/jmpm.v5i2.14109.

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Pada tahun 2018, 37,5 juta ton tandan kosong kelapa sawit (TKKS) diproduksi di Indonesia dan berpotensi untuk digunakan sebagai bahan bakar padat. Namun, ada dua masalah utama dalam penggunaan TKKS sebagai bahan bakar padat, yaitu nilai kalor yang rendah dan kandungan kalium yang tinggi. Oleh karena itu, EFB perlu melalui beberapa proses terlebih dahulu yaitu torrefaction dan washing. Namun, ketika torrefaksi dilakukan terlebih dahulu diperkirakan dapat mempengaruhi kinerja pelindian kalium. Metode studi literatur digunakan dalam penelitian ini untuk mengetahui pengaruh torrefaksi terhadap pel

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Dewi rezki, Siska Efendi, and Herviyanti. "Pengaruh Kompos, Bahan Humat dari Batubara tidak produktif dan Pupuk Buatan Terhadap Bibit Kakao (Theobroma cacao) pada Oxisol." Jurnal Riset Perkebunan 3, no. 1 (2022): 38–47. http://dx.doi.org/10.25077/jrp.3.1.38-47.2022.

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Organic matter has a very important role in determining the level of soil fertility, especially in marginal soils such as Oxisol which is widespread in Indonesia. Organic matter that is commonly used requires large amounts and has the ability to react relatively slowly in the soil. Therefore, it is necessary to make efforts to obtain organic material that reacts quickly in the soil, such as humic material extracted from lignite. In this study, cocoa (Theobroma cacao) was used as an indicator plant. Cocoa is one of the plantation commodities that has a fairly important role in the national econ

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Chen, Dandan, Xuguang Jiang, Shuai Lv, et al. "Thermal treatment of Indonesian lignite washery tailing." Journal of Thermal Analysis and Calorimetry 123, no. 2 (2015): 1727–33. http://dx.doi.org/10.1007/s10973-015-4862-z.

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Chen, Dandan, Xuguang Jiang, Shuai Lv, et al. "Thermal treatment of Indonesian lignite washery tailing." Journal of Thermal Analysis and Calorimetry 123, no. 2 (2015): 1735–42. http://dx.doi.org/10.1007/s10973-015-4888-2.

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Mahreni, Mahreni, and Mitha Puspitasari. "Preliminary Study of Calorific Value Increase on Lignite Coal Using Dialkyl Carbohydrate Biosurfactant." Journal of Pure and Applied Chemistry Research 9, no. 2 (2020): 126–32. http://dx.doi.org/10.21776/ub.jpacr.2020.009.02.508.

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Indonesian coal consumption is dominated by a low-grade coal quality, and supplied from local coals mining which was composed of lignite. A technological breakthrough has to be main objective to convert low grade coal into upper-class coal. This paper reports on improving the quality of lignite coal by washing with biosurfactant. Di-alkyl carbohydrates were tested on coal sizes of 80, 64, 16 and 6 mesh. The optimum biosurfactant applied to increase the calorific value derived from brown algae, namely isopropyl stearate alginate (ISA) 0.5%. This was able to improve a calorific value of lignite

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Cheng, Jun, Fan Zhou, Xin Wang, et al. "Optimization of microwave dewatering of an Indonesian lignite." Fuel Processing Technology 144 (April 2016): 71–78. http://dx.doi.org/10.1016/j.fuproc.2015.12.015.

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Zaman, Muhammad Rizaldi, and Sri Widodo Agung Suedy. "Pemanfaatan Batubara Kalori Rendah pada IGCC (Integrated Gasification Combined Cycle)." Jurnal Energi Baru dan Terbarukan 1, no. 1 (2020): 35–44. http://dx.doi.org/10.14710/jebt.2020.11156.

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Kekhawatiran akan emisi gas rumah kaca dan krisis energi yang semakin dirasakan negara-negara didunia khususnya di Indonesia menyebabkan perlu dilakukan pengembangan energi alternatif yang bersih dan ramah lingkungan. Teknologi Integrated Gasification Combined Cycle dapat menjadi alternatif terbaik untuk mengatasi permasalaan tersebut. Penelitian ini dilakukan dengan tujuan untuk memberikan gambaran dan keuntungan dari proses IGCC berdasarkan penilitian-penelitian yang sudah ada sehingga dapat dilakukan pengembangan pemanfaatan IGCC menggunakan batubara lignit di Indonesia. Penelitian ini dila

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39

Lee, Do Kyun, Sang Kyum Kim, Soon Choel Hwang, Si Hoon Lee, and Young Woo Rhee. "Kinetic Study on Char-CO2Catalytic Gasification of an Indonesian lignite." Korean Chemical Engineering Research 52, no. 4 (2014): 544–52. http://dx.doi.org/10.9713/kcer.2014.52.4.544.

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40

Haq, Shofa Rijalul, Muhammad Faiz Shafiyurrhaman, Ade Kurniawan, Yuda Prasetyo, Imam Prasetyo, and Sanghee Jeon. "Thermogravimetric Analysis of Indonesian Low-Rank Coal: Optimization of Drying Temperature and Kinetic Modeling." Jurnal Rekayasa Proses 19, no. 1 (2025): 31–41. https://doi.org/10.22146/jrekpros.18102.

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Drying high-moisture of low rank coal in the mining sector is essential for increasing energy efficiency and ensuring stability in its use as an energy source. This study aims to determine the optimal drying temperature and kinetic parameters for Indonesian low rank coal (i.e., lignite and sub-bituminous) using thermogravimetric analysis (TGA) under both isothermal and non-isothermal conditions. Coal samples were tested at three heating rates (5, 10, and 20°C/min) and three fixed temperatures (150, 200, and 250°C). Several drying kinetics models, including the Newton, Henderson and Pabis, Loga

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41

Zhou, Fan, Jun Cheng, Jianzhong Liu, Zhihua Wang, Junhu Zhou, and Kefa Cen. "Improving the permittivity of Indonesian lignite with NaCl for the microwave dewatering enhancement of lignite with reduced fractal dimensions." Fuel 162 (December 2015): 8–15. http://dx.doi.org/10.1016/j.fuel.2015.09.007.

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42

Wibawa, A. "Preparation of High Strength Coke from Indonesian Lignite by Deeply Pulverized." IOP Conference Series: Earth and Environmental Science 789, no. 1 (2021): 012074. http://dx.doi.org/10.1088/1755-1315/789/1/012074.

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43

Park, Jae Hyeok, Chang-Ha Lee, Young Cheol Park, Dowon Shun, Dal-Hee Bae, and Jaehyeon Park. "Drying Efficiency of Indonesian Lignite in a Batch-Circulating Fluidized Bed Dryer." Drying Technology 32, no. 3 (2014): 268–78. http://dx.doi.org/10.1080/07373937.2013.822385.

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44

Zhou, Fan, Jun Cheng, Jianzhong Liu, Junhu Zhou, and Kefa Cen. "Improving physicochemical properties of upgraded Indonesian lignite through microwave irradiation with char adsorbent." Fuel 218 (April 2018): 275–81. http://dx.doi.org/10.1016/j.fuel.2018.01.044.

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Cheng, Jun, Fan Zhou, Xin Wang, et al. "Physicochemical properties of wastewater produced from the microwave upgrading process of Indonesian lignite." Fuel 158 (October 2015): 435–42. http://dx.doi.org/10.1016/j.fuel.2015.05.062.

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46

Huan Song, Kangshun Han, Yuan Fang, Guoqing Li, Xiangchun Liu, and Ping Cui. "Effects of Chain Alkanes on Restraining Water Re-Adsorption of Dried Indonesian Lignite." Coke and Chemistry 66, no. 3 (2023): 163–70. http://dx.doi.org/10.3103/s1068364x23700540.

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47

Zhao, Huan, Jianglong Yu, Junshuai Liu, and Arash Tahmasebi. "Experimental study on the self-heating characteristics of Indonesian lignite during low temperature oxidation." Fuel 150 (June 2015): 55–63. http://dx.doi.org/10.1016/j.fuel.2015.01.108.

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48

Shixian Fang, Ying Chen, Jinxuan Bao, Xiangchun Liu, and Ping Cui. "Investigation of Low-Temperature Copyrolysis of Organic Matter from Huadian Oil Shale and Indonesian Lignite." Coke and Chemistry 67, no. 2 (2024): 118–24. http://dx.doi.org/10.3103/s1068364x2470131x.

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49

Liu, Meng, Jian Li, and Yufeng Duan. "Effects of solvent thermal treatment on the functional groups transformation and pyrolysis kinetics of Indonesian lignite." Energy Conversion and Management 103 (October 2015): 66–72. http://dx.doi.org/10.1016/j.enconman.2015.06.047.

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50

Li, Guoqing, Aorui Xiu, Xiangchun Liu, and Ping Cui. "Effects of Changes in Physicochemical Properties Caused by Hydrothermal Treatment on Pyrolysis Performance of Indonesian Lignite." Solid Fuel Chemistry 56, no. 6 (2022): 496–501. http://dx.doi.org/10.3103/s0361521922060143.

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