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Journal articles on the topic 'Sub-bituminous coal'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Julzarika, Atriyon, and Kuncoro Teguh Setiawan. "UTILIZATION OF SAR AND EARTH GRAVITY DATA FOR SUB BITUMINOUS COAL DETECTION." International Journal of Remote Sensing and Earth Sciences (IJReSES) 11, no. 2 (2017): 143. http://dx.doi.org/10.30536/j.ijreses.2014.v11.a2612.

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Remote sensing data can be used for geological and mining applications, such as coal detection. Coal consists of five classes of Anthracite, Bituminous, Sub-Bituminous, Lignite coal and Peat coal. In this study, the type of coal that is discussed is Sub bituminous, Lignite coal, and peat coal. This study aims to detect potential sub bituminous using Synthetic Aperture Radar (SAR) data, and earth gravity. One type of remote sensing data to detect potential sub bituminous, lignite coal and peat coal are SAR data and satellite data Geodesy. SAR data used in this study is ALOS PALSAR. SAR data is

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2

Maulana, A., M. Harianti, T. B. Prasetyo, and Herviyanti. "Correlation of Hg-N on ex-gold mining soil ameliorated with Sub-Bituminous coal and activation of Sub-Bituminous coal–NaOH." IOP Conference Series: Earth and Environmental Science 1208, no. 1 (2023): 012049. http://dx.doi.org/10.1088/1755-1315/1208/1/012049.

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Abstract Mercury (Hg) contamination has become a serious threat to ecosystems. Amelioration technology for soil is expected to control the specific interactions between N in ex-gold mining soil contaminated with Hg. This research aimed to analyze the interaction of Hg-N on ex-gold mining soil ameliorated with sub-bituminous coal and the activation of sub-bituminous coal with 10% NaOH. The experimental design used in this study was a Completely Randomized Design with three replications. The treatment I (Sub-bituminous coal) and II [activation of Sub-bituminous coal with 10% NaOH) was implemente

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3

Herviyanti, Herviyanti, Amsar Maulana, Mimien Harianti, et al. "Effect of glyphosate contamination on surface charge change and nutrients of degraded Inceptisols ameliorated with sub-bituminous coal." Journal of Degraded and Mining Lands Management 11, no. 2 (2024): 5135–45. http://dx.doi.org/10.15243/jdmlm.2024.112.5135.

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The widespread use of glyphosate to eradicate weeds in agricultural areas has the potential for contamination and residues in the soil that must be carefully considered. This study aimed to elucidate the effect of glyphosate contamination on the chemical properties of an Inceptisol ameliorated with sub-bituminous coal. This study used a completely randomized design with three treatments and three replications, namely A = control (soil with no glyphosate and sub-bituminous coal), B = 5 kg soil + 100 mg glyphosate L-1, and C = 5 kg soil + 40 t sub-bituminous coal ha-1 + 100 mg glyphosate L-1. Th

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4

Kearns, Alex, Meenakshi Bansal, Theodore Kalbfleisch, et al. "Stabilization and solidification of brine water containing selenium, chromium, copper, and mercury utilizing a microwave enabled sol–gel process." Environmental Science: Water Research & Technology 7, no. 5 (2021): 904–12. http://dx.doi.org/10.1039/d1ew00081k.

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Solidification/stabilization of wastewater from a coal-fired power plant, burning bituminous and sub-bituminous coals via sol–gel synthesized from tetramethyl orthosilicate (TMOS) (top) and demonstration of TMOS chemical fixation mechanism (below).

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5

Spitz, N., R. Saveliev, M. Perelman, et al. "Firing a sub-bituminous coal in pulverized coal boilers configured for bituminous coals." Fuel 87, no. 8-9 (2008): 1534–42. http://dx.doi.org/10.1016/j.fuel.2007.08.020.

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6

Abdullah, Wan Hasiah, and Say Gee Sia. "Geology, resource potential and organic petrography of the Neogene coals in the Miri area of Northwest Sarawak, Malaysia." Warta Geologi 48, no. 2 (2022): 66–71. http://dx.doi.org/10.7186/wg482202202.

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There are three coal-bearing geological formations in the Miri area, viz. the Belait Formation, the Lambir Formation, and the Liang Formation. Of the three coal-bearing geological formations, only the sub-bituminous B Tutoh coals from the Belait Formation, with an estimated resource of 203 million tonnes, are believed to be of economic potential. The Tutoh coals are dominated by vitrinite group, especially desmocollinite. The sub-bituminous B from the Lambir Formation and the lignite from Liang Formation are of low economic potential due to the limited area of the hosting formations.

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7

Yang, Tao, Jingyan Hu, Tao Li, Heng Min, and Shuchao Zhang. "Molecular Energy of Metamorphic Coal and Methane Adsorption Based on Gaussian Simulation." Processes 12, no. 12 (2024): 2621. http://dx.doi.org/10.3390/pr12122621.

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Effectively controlling the adsorption and desorption of coal and mine gas is crucial to preventing harm to the environment. Therefore, this paper investigated the adsorption of coal and methane molecules from the perspective of microscopic energy through Gaussian simulation. Gaussian 09W and GaussView 5.0 software were used to construct and optimize the molecular model of four different metamorphic coals, namely lignite, sub-bituminous coal, bituminous coal, and anthracite, and their adsorption structure with methane as well as the energy, bond length, vibration frequency, infrared spectrum,

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Chernyavskyi, M. V., O. Yu Provalov, Ye S. Miroshnychenko, and O. V. Kosyachkov. "Converting Slovianska TPP with the central coal pulverizing plant from anthracite to sub-bituminous coal." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 3 (June 30, 2023): 46–53. http://dx.doi.org/10.33271/nvngu/2023-3/046.

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Purpose. To develop scientific foundations and technical solutions and to implement the converting of the anthracite boiler of the 800 MW unit of Slovianska TPP with central coal pulverizing plant to sub-bituminous coal combustion with maximum use of existing equipment, without stopping the unit’s operation. Methodology. Theoretical and calculational studies on the processes of coal drying and pulverizing at the central coal pulverizing plant. Calculational justification of technical solutions to eliminate the risk of pulverized coal ignition in the pulverized coal supply system and in the boi

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9

Sarate, O. S. "Biopetrological study of Mulug coal belt, Godavari Basin, Andhra Pradesh, India." Journal of Palaeosciences 43, no. 1-3 (1994): 51–66. http://dx.doi.org/10.54991/jop.1994.1187.

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Biopetrological investigation of 12 coal seams from Mulug coal belt of Godawari Basin has been carried OUID evaluate their economic potentials. The coal seams are associated with the Karharbari and Barakar of the Lower Gondwana sequence. The maceral study has revealed that seams IV A, IV , 111 B, II, I below index, I and IA contain vitric coal. However, IV below index, III and I B seams are characterized by a mixture of both vtric and fusic coals. Besides, III A and II below index seams contain fusic coal. The microlithotype analysis indicates that the vitric coal has the dominance of vitrite,

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10

Xie, Heng Shen, Zhi Min Zong, Qing Wei, et al. "Photocatalytic Oxidation of Shenfu Bituminous Coal and Xilinhaote Lignite with H₂O₂ over TiO₂." Advanced Materials Research 233-235 (May 2011): 1684–89. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.1684.

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Shenfu bituminous coal (SFBC) and Xilinhaote lignite (XL) were subject to photo-catalytic oxidation with hydrogen peroxide over titanium dioxide. The reaction mixtures were extracted with acetone exhaustively. The extracts were analyzed with FTIR and GC/MS. The results show that coals be oxidized selectively and degraded partially. Compared with the bituminite coal, the oxidation effect of the lignite coal with active hydrogens is more obvious. The alkyl side chains of the macromolecules, particularly, chains of methyl, methylene and aromatic, are the most vulnerable in relation to other compo

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11

Bondzyk, D. L., O. V. Baranyuk, M. V. Vorobyov, M. V. Chernyavskyy, and O. V. Kosyachkov. "CFD-modeling of critical deviations of combustion processes in pulverized coal boilers. Part 1. Construction of the TPP-210A boiler calculation model." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 2 (April 30, 2024): 52–59. http://dx.doi.org/10.33271/nvngu/2024-2/052.

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Purpose. Development of a mathematical model for predicting critical deviations of furnace processes during the operation of anthracite boilers converted to burning sub-bituminous coal, including in non-design modes of operation. Verification of the calculation model of the TPP-210A boiler of the 300 MW power unit on the design fuel – anthracite for further analysis of its operation on sub-bituminous coal. Methodology. Modelling of solid fuel combustion was performed with the help of finite-element CFD models of the boiler unit in the ANSYS-Fluent software complex with the determination of the

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12

Putri Wijayanti, Meilinda, Agus Haris Widayat, Komang Anggayana, Nurulhuda Halim, and Aisyah Al Hamda. "The Effect of Indonesian Coal Characteristics on The Pyrolysis Activation Energy." IOP Conference Series: Earth and Environmental Science 1437, no. 1 (2024): 012008. https://doi.org/10.1088/1755-1315/1437/1/012008.

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Abstract Coal is one of the primary energy sources in Indonesia. As the demand for thermal coal has increased, global environmental concern has also raised. Implementation of clean coal technology such as gasification is therefore a challenge and opportunity for future coal beneficiation. Pyrolysis is an early stage of gasification process which in this study would be investigated. Samples of three coals were taken from different coal basins to evaluate their characteristics. Sample B1, B2 and B3 are from Meulaboh, Kutai and South Sumatra Basins, respectively. The characterization included pro

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13

Imran, Muhammad, Khurram Shahzad, Shahid Munir, Muhammad Wasim, and Ali Hussnain. "Synthesis and characterization of potassium silicate fertilizer using fly ashes of bituminous and sub-bituminous and lignite coal." Journal of the Pakistan Institute of Chemical Engineers 48, no. 2 (2021): 47–54. http://dx.doi.org/10.54693/piche.04826.

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Present study focuses on coal fly ash, a waste acquired from coal power plants for the synthesis of potassium based fertilizer by means of coal fly ash and lignite with simple blending of KOH and adding small amount of citric acid. Lignite and two types of fly ash bituminous and sub-bituminous were utilized for the formulation of fertilizer. X-ray diffraction (XRD) revealed the occurrence quartz and oxides of potassium in all fly ashes. XRD pattern also exhibited the orthoclase, mullite and zeolite as major compounds in fertilizer which were made from sub-bituminous ash. K2O, P2O5 and N were d

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14

Singh, Ganesh P. "Petrochemical Basis for the Rank (Maturity) Evaluation of Permian Coals of the Ramagundam Coal Belt, Godavari Valley Coalfield, Andhra Pradesh." Journal Geological Society of India 50, no. 4 (1997): 389–97. http://dx.doi.org/10.17491/jgsi/1997/500402.

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Abstract The Permian coals of Ramagundam coalfield are sub-bituminous to high volatile bituminous in rank on the basis of chemical (carbon, and volatile matter) and petrographic (reflectance-Rom,) parameters. These coals are characterized as kerogen type-III. Reflectance (Rom) values suggest the maturation temperatures rapging from 46° and 108°C and depth of burial, of coal bearing horizons varies from 1725 to 2175 metres.

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15

Sarate, O. S. "Biopetrological study of coals from Ramagundam coalfield, Godavari basin, Andhra Pradesh, India." Journal of Palaeosciences 43, no. 1-3 (1994): 122–38. http://dx.doi.org/10.54991/jop.1994.1195.

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A detailed petrographic study of eight coal seams from Ramagundam Coalfield, Andhra Pradesh is presented here. The top section of the coal seam I A, I, II, III A, III and IV contains workable thickness. Reflectance study has revealed that the seams IA (middle), III B, III A, III (top) and IV contain coal of high volatile bituminous C rank. Coal seams I A (top and bottom parts), I, II and III (middle) seams/part thereof are constituted by alternate coal bands of high volatile bituminous C and high volatile bituminous B rank. Besides, coal seam III and coal bands present below I seam have attain

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16

Su, Yinjiao, Xuan Liu, Yang Teng, and Kai Zhang. "A Preliminary Study on Dependence of Mercury Distribution on the Degree of Coalification in Ningwu Coalfield, Shanxi, China." Energies 14, no. 11 (2021): 3119. http://dx.doi.org/10.3390/en14113119.

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Mercury (Hg) is a toxic trace element emitted from coal conversion and utilization. Samples with different coal ranks and gangue from Ningwu Coalfield are selected and investigated in this study. For understanding dependence of mercury distribution characteristics on coalification degree, Pearson regression analysis coupled with Spearman rank correlation is employed to explore the relationship between mercury and sulfur, mercury and ash in coal, and sequential chemical extraction method is adopted to recognize the Hg speciation in the samples of coal and gangue. The measured results show that

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17

Ikwuagwu, Chibuisi Samuel, and Maduabuchi Uche Uzoegbu. "The Maiganga Coal Deposit: Bituminous, Sub-Bituminous or Lignite?" IOSR Journal of Applied Geology and Geophysics 05, no. 01 (2017): 67–74. http://dx.doi.org/10.9790/0990-0501016774.

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18

Hainley, D. C., M. Z. Haji-Sulaiman, S. Yavuzkurt, and A. W. Scaroni. "Operating Experience With a Fluidized Bed Test Combustor." Journal of Energy Resources Technology 109, no. 2 (1987): 58–65. http://dx.doi.org/10.1115/1.3231325.

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This paper presents operating experience with a fluidized bed combustor burning various coals. The primary focus is on the effect of relevant coal properties on combustor performance. Tests were carried out using anthracite, HVB and HVC bituminous and sub-bituminous A coals, and petroleum coke. Comparisons of the performance of the combustion on the various fuels are made. A two-stage fluidized bed combustor operating in a single-stage mode without recycle was employed. Experimental measurements included temperature, fuel feed rate, fluidization velocity and bed height. For some of the coals,

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19

Qin, Dingyi, Qianyun Chen, Jing Li, and Zhaohui Liu. "Effects of Pressure and Coal Rank on the Oxy-Fuel Combustion of Pulverized Coal." Energies 15, no. 1 (2021): 265. http://dx.doi.org/10.3390/en15010265.

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Pressurized oxy-fuel combustion technology is the second generation of oxy-fuel combustion technology and has low energy consumption and low cost. In this research, a visual pressurized flat-flame reaction system was designed. A particle-tracking image pyrometer (PTIP) system based on a high-speed camera and an SLR camera was proposed. Combining the experimental system and data-processing method developed, the ignition and combustion characteristics of a single coal particle between 69 and 133 μm in size were investigated. The results indicated that at atmospheric pressure, the ignition delay

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20

Prasetyo, T. B., A. Maulana, M. Harianti, A. L. Lita, and H. Herviyanti. "Study of surface charge and chemical properties of ex-gold mining soil ameliorated with Indonesian sub-bituminous coal." IOP Conference Series: Earth and Environmental Science 1160, no. 1 (2023): 012032. http://dx.doi.org/10.1088/1755-1315/1160/1/012032.

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Abstract Contamination of mercury (Hg) in ex-gold mining soil is the impetus for the development of amelioration technology that utilizes Indonesian sub-bituminous coal to study the soil surface charge and the chemical properties of ex-gold mining soil. This research was aimed to study surface charge and chemical properties of ex-gold mining soil ameliorated with Indonesian sub-bituminous coal. The experimental design used in this study was a Completely Randomized Design with three replications. The treatment was implemented in a pot with the equivalent dose: A = 0 (0.0g); B = 10 (0.5g); C = 2

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21

Mohd Samsuri, Muhamad Shazarizul Haziq, Hasril Hasini, Noor Akma Watie Mohd Noor, and Meor Mohd Faisal Meor Zulkifli. "Temperature Profile Assessment of Sub-Bituminous Coal by Using a Single Burner Combustion Test Facility." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 78, no. 1 (2020): 1–10. http://dx.doi.org/10.37934/arfmts.78.1.110.

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This paper presents a thermogravimetric analysis and combustion test for different coals used in a coal-fired power plant in Malaysia. The main objective is to investigate the suitability of adopting a newly-introduced sub-bituminuous coal in an existing boiler furnace commonly firing standard design coals. In order to ensure that the new coal will not give an adverse effect to the boiler, detail analytical and thermal performance of the new coal is investigated, together with design and other limiting coals. The combustion test was performed in a scaled down, 150kW, single swirl burner combus

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Popowich, Jim. "Alberta's Sub-Bituminous Coal – Building on its Strengths." Energy Exploration & Exploitation 11, no. 6 (1993): 528–39. http://dx.doi.org/10.1177/014459879301100604.

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The 1973 decision to base Alberta's electrical generation on sub-bituminous coal has provided a balance between economic, environmental and social goals in the province. Presently six strip mines produce more than 22 million tonnes of low-sulphur coal for 6 thermal stations that generate 90% of the province's electricity needs. Alberta has relatively low-cost power, high coal-related job creation and an industry meeting the goals of sustainable development.

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23

Mohammad Nurizat Rahman. "Optimisation of Solid Fuel In-furnace Blending for an Opposed-firing Utility Boiler: A Numerical Analysis." CFD Letters 14, no. 9 (2022): 89–107. http://dx.doi.org/10.37934/cfdl.14.9.89107.

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Continuous research on the clean and effective use of coal is still necessary as coal will continue to play a key role in global energy supply for the foreseeable future. Hence, in the current study, the optimisation of in-furnace coal blending for one of Malaysia's opposed-firing utility boilers was numerically executed on the basis of hydrodynamics and combustion characteristics. The predicted FEGT from the numerical model was validated against the actual FEGT from the coal-fired power plant, revealing a difference of less than 10 %. Four (4) coal blended cases were tested, which included bo

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24

Zhang, He, Wenli Liu, Hongxiang Xu, Qiming Zhuo, and Xiaopeng Sun. "Adsorption Behavior of Methyl Laurate and Dodecane on the Sub-Bituminous Coal Surface: Molecular Dynamics Simulation and Experimental Study." Minerals 9, no. 1 (2019): 30. http://dx.doi.org/10.3390/min9010030.

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Biodiesel was found to be a more effective collector on low-rank coal flotation than the common oily collectors (diesel and kerosene) in previous research. However, the micro-adsorption behavior of these collectors on the coal surface remains to be further explored. In the present work, the adsorption behavior of methyl laurate and dodecane, representing biodiesel and common oily collectors, was investigated using experimental and molecular dynamics (MD) simulation methods. The results of MD simulations showed that dodecane was difficult to diffuse on the surface of sub-bituminous coal and for

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Chernyavskyy, M. V., O. Yu Provalov, Ye S. Miroshnychenko, and O. V. Kosyachkov. "Scientific bases and peculiarities of conversion of CHPP anthracite boilers to sub-bituminous coal combustion." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 1 (February 29, 2024): 41–49. http://dx.doi.org/10.33271/nvngu/2024-1/041.

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Scientific bases and peculiarities of conversion of CHPP anthracite boilers to sub-bituminous coal combustion Print EmailUser Rating: / 0 PoorBest Category: Content №1 2024 Last Updated on 29 February 2024 Published on 30 November -0001 Hits: 1 SocButtons v1.4 Authors: M.V.Chernyavskyy*, orcid.org/0000-0003-4225-4984, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: mchernyavski@gmail.com O.Yu.Provalov, orcid.org/0000-0002-5191-2259, Thermal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv, Ukraine, e-mail: eprov

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Liu, Lei, Zhiqiang Gong, Zhenbo Wang, and Haoteng Zhang. "Study on combustion and emission characteristics of chars from low-temperature and fast pyrolysis of coals with TG-MS." Environmental Engineering Research 25, no. 4 (2019): 522–28. http://dx.doi.org/10.4491/eer.2019.220.

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To achieve the clean and efficient utilization of low-rank coal, the combustion and pollutant emission characteristics of chars from low-temperature and fast pyrolysis in a horizontal tube furnace were investigated in a TG-MS analyzer. According to the results, the combustion characteristic of chars was poorer than its parent coals. The temperature range of gaseous product release had a good agreement with that of TGA weight loss. Gaseous products of samples with high content of volatile were released earlier. The NO and NO<sub>2</sub> emissions of chars were lower than their paren

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Nath, Manabendra. "Tertiary Coal Deposits from the North-eastern Region of India – A review." Indian Association of Sedimentologists 41, no. II (2024): 51–61. https://doi.org/10.51710/jias.v41iii.384.

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This review paper aims to provide a comprehensive account of the Tertiary coal resources of north-eastern region of India. The coal belt of North-East India developed in two different geo-tectonic settings – one is the foreland basin (Assam, Arunachal Pradesh, Nagaland Oligocene coals) and the other platform areas (Meghalayan Eocene coals). The rank of eastern Himalayan coals varies from sub-bituminous to high volatile bituminous C. The carbon content of Oligocene coal is much higher and show caking characteristics. The coals of this part of India have low ash (<8%), low moisture (<5%),

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Wu, Huihui, Hengfu Shui, Lei Yang, et al. "Thermal Dissolution of Shenfu Sub-Bituminous Coal Promoted by Lignin." Open Fuels & Energy Science Journal 11, no. 1 (2018): 71–80. http://dx.doi.org/10.2174/1876973x01811010071.

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Objective: Thermal Dissolution (TD) and Co-thermal Dissolution (CTD) of Shenfu (SF) coal and lignin were studied. The effect of temperature on the TD and CTD of SF coal and lignin was discussed. Method: The synergistic effect of SF coal and lignin in CTD was probed with the characterization of thermal dissolution soluble fraction by elementary analysis, FTIR and TG determinations. Result: The results suggested that TD activity of lignin was higher than that of SF coal. Both SF coal and lignin gave their maximal thermal dissolution yield (TDY) of 57.6 and 82.5%, respectively at 360oC. In CTD of

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Wu, Jian Qun, Dun Xi Yu, Lan Lan He, et al. "Partitioning of Harmful Elements in PM₁₀ from Air-and Oxy-Coal Combustion: Iron and Sulfur." Advanced Materials Research 726-731 (August 2013): 963–66. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.963.

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Adverse health effects of Fe and S in airborne particulate matter (PM) have been reported. However, little work has been done to characterize Fe and S in PM10 from coal combustion. In this study, a sub-bituminous coal (coal A) and a bituminous coal (coal B) were subjected to combustion in a drop tube furnace under air-and oxy-firing conditions. Size distribution and elemental composition of PM10 (PM with aerodynamic diameter 10 μm) were obtained by low pressure impactor and X-ray fluorescence techniques, respectively. The partitioning characteristics of Fe and S in PM10 were investigated. Data

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Zhang, Yihuai, Maxim Lebedev, Gregory Smith, Yu Jing, Andreas Busch, and Stefan Iglauer. "Nano-mechanical Properties and Pore-Scale Characterization of Different Rank Coals." Natural Resources Research 29, no. 3 (2019): 1787–800. http://dx.doi.org/10.1007/s11053-019-09572-8.

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ABSTRACT Characterization of coal micro-structure and the associated rock mechanical properties are of key importance for coal seam exploration, coal bed methane development, enhanced coal bed methane production and CO2 storage in deep coal seams. Considerable knowledge exists about coal chemical properties, but less is known about the nanoscale to the micro-scale structure of coals and how they change with coal strength across coal ranks. Thus, in this study, 3D X-ray micro-computed tomography (with a voxel size of 3.43 µm) and nano-indentation tests were conducted on coal samples of differen

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W, Bambang Agus. "EFFECT OF TEMPERATURE ON RUMEN MICROBES ACTIVITY TO PRODUCE METHANE FROM COAL." Scientific Contributions Oil and Gas 37, no. 3 (2022): 155–60. http://dx.doi.org/10.29017/scog.37.3.636.

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This paper is intended to show the effect of temperature on utilization microbes of rumen Àuid to produce methane from coal (lignite, sub-bituminous and bituminous). By considering to field applications, where the CBM reservoir temperature is higher than the microbes natural living conditions in the cow's body, the experiment is carried out at a temperature of 30ºC and 50ºC with an incubation period time of 105 days. Laboratory scale study was conducted by mixing the coal, formation water and rumen Àuid (1: 1: 1). This mixture were inserted into a closed chamber equipped with a hose to measuri

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Ndasi, Moses Babila, Nicola Jane Wagner, and Richard Viljoen. "Petrological, Geochemical, and Mineralogical Characterization of Three Coal Seams of the Imaloto Basin, Southwestern Madagascar." Minerals 14, no. 6 (2024): 620. http://dx.doi.org/10.3390/min14060620.

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There is a lack of published literature on coal deposits in Madagascar. The Imaloto Basin is a sub-basin of the Morondava Basin, Southwestern Madagascar, and hosts the Sakoa Coal Measures. The aim of this study was to increase our understanding of the petrography, geochemistry, and mineralogy of coal deposits hosted in the Imaloto Basin. Three coal seams (from the bottom: Main Seam, Upper Seam, and Top Seam) were intersected during a drilling program conducted by the Lemur Holdings in 2019. Coal samples were characterized using organic petrography (type and rank determination); the ash chemist

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Scott, S. G., and P. Crosdale. "THE WALLOON COAL MEASURES—THE NEXT COAL SEAM GASTARGET?" APPEA Journal 40, no. 1 (2000): 86. http://dx.doi.org/10.1071/aj99006.

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The Queensland coal seam gas industry has grown over the last 12 years. During this time the vast majority of exploration wells have targeted the Late Permian coal measures in the Bowen and Galilee Basins. These formations have been the major target because they contain coals with a vitrinite reflectance ranging above 0.7%. This range has always been seen as the main period for methane generation.As well as containing vast quantities of Permian coal, Queensland also has vast quantities of Middle Jurassic coals within its Mesozoic Basins. These coals have received little-to-no exploration for t

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Georgakopoulos, Andreas. "Aspects of solid state 13C CPMAS NMR spectroscopy in coals from the Balkan peninsula." Journal of the Serbian Chemical Society 68, no. 8-9 (2003): 599–606. http://dx.doi.org/10.2298/jsc0309599g.

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The cross-polarized magic-angle-spinning NMR (CPMAS-NMR) technique was used in this work to assess the carbon distribution in coals of different rank (peat, lignite, xylite, sub-bituminous coal) from important deposits in Greece and Bulgaria. The technique is assumed to be only semiquantitative due to a number of interferences, such as spinning side bands (SSB) in the spectra, paramagnetic species in the samples, and low or remote protonation of aromatic carbons. The Bulgarian sub-bituminous coal shows the greatest amounts of aromatic structures. The lignite sample from the Drama basin Norther

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Yue, Xiangling, Ana Arenillas, and John T. S. Irvine. "Application of infiltrated LSCM–GDC oxide anode in direct carbon/coal fuel cells." Faraday Discussions 190 (2016): 269–89. http://dx.doi.org/10.1039/c6fd00001k.

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Hybrid direct carbon/coal fuel cells (HDCFCs) utilise an anode based upon a molten carbonate salt with an oxide conducting solid electrolyte for direct carbon/coal conversion. They can be fuelled by a wide range of carbon sources, and offer higher potential chemical to electrical energy conversion efficiency and have the potential to decrease CO<sub>2</sub> emissions compared to coal-fired power plants. In this study, the application of (La, Sr)(Cr, Mn)O<sub>3</sub> (LSCM) and (Gd, Ce)O<sub>2</sub> (GDC) oxide anodes was explored in a HDCFC system running with two different carbon fuels, an or

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Taborda Acevedo, Esteban Alberto, William Jurado, and Farid B. Cortés. "Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal." Boletín de Ciencias de la Tierra, no. 39 (January 1, 2016): 57–64. http://dx.doi.org/10.15446/rbct.n39.54127.

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The presence of water in coal presents a technological challenge for its industrial use in energetic processes. Therefore, this study aims to study the temperature effect on the water adsorption onto coals at 21, 30, 40 and 50°C. A Colombian bituminous coal was used as sample. The coal was characterized by nitrogen adsorption at 77 K (SBET), Scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, elemental analysis (C-H-N elemental). The results showed that the water uptake increased as the vapor pressure increased. The Talu and Meunier model [1] was used to fit th

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Hashimoto, Nozomu, and Hiromi Shirai. "Numerical simulation of sub-bituminous coal and bituminous coal mixed combustion employing tabulated-devolatilization-process model." Energy 71 (July 2014): 399–413. http://dx.doi.org/10.1016/j.energy.2014.04.091.

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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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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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Singh, Mahendra P., and Prakash K. Singh. "Organic Maturation Study of Permian Coal Seams, Rajmahal Basin, Bihar." Journal Geological Society of India 51, no. 3 (1998): 279–94. http://dx.doi.org/10.17491/jgsi/1998/510302.

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Abstract The coals are sub-bituminous to high volatile bituminous in rank and show evidences of "bituminization" stage of maturation. They have distinctive petrographic characteristics being rich in secondary liptinites such as exsudatinite (nil to 7.66%), bituminite (0.94 to 28.88%) and fluorinite (nil to 0.99%). The rock-eval data suggest that they are hydrogen-rich and have immature organic matter-kerogen type 1II. The study corroborates the earlier contention regarding the onset of 'oil window' at Rom of 0.5% and suggests that the paleodepth of burial of the coal bearing horizon in the Raj

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Jang, Jun-Ho, Qhwang-Hee Rhee, Won-Tae Seo, Yoon-Young Jang, and Hyun-Tae Jang. "Measurement Method of Sub-Bituminous Coal Spontaneous Combustion." Journal of the Korea Academia-Industrial cooperation Society 23, no. 4 (2022): 268–75. http://dx.doi.org/10.5762/kais.2022.23.4.268.

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Chen, Hong, Baowei Zhu, and Jianwei Li. "Studies on Macrostructure of Shenfu Sub-bituminous Coal." Journal of The Institution of Engineers (India): Series E 96, no. 1 (2015): 55–62. http://dx.doi.org/10.1007/s40034-014-0053-x.

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Szendrői, Andrea, L. G. Gazsó, and E. J. Hidvégi. "Biodesulphurization of Hungarian lignite and sub-bituminous coal." Fuel Processing Technology 40, no. 2-3 (1994): 269–75. http://dx.doi.org/10.1016/0378-3820(94)90149-x.

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Barbosa, Karina, Joan Esterle, Nikola Van De Wetering, and Zhongwei Chen. "Shore hardness measurements of sub-bituminous coal microlithotypes." International Journal of Coal Geology 217 (January 2020): 103341. http://dx.doi.org/10.1016/j.coal.2019.103341.

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Wang, Minghao, Zhenzhou Pang, Guohua Wei, et al. "Research on Oxy-Fuel Combustion Characteristics of Two Typical Chinese Coals." Processes 11, no. 7 (2023): 1933. http://dx.doi.org/10.3390/pr11071933.

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Oxy–fuel (O2/CO2) combustion technology shows great potential for carbon reduction. However, difference in the combustion atmosphere would affect coal combustion characteristics and pollutant emissions. In order to explore oxy–fuel combustion characteristics, two typical Chinese coals, sub–bituminous and lean coal, were utilized. Based on thermogravimetry and pilot–scale test, the ignition and burnout characteristics under oxy–fuel and air combustion atmosphere were investigated. Besides, the NOx emission characteristics were also investigated on the pilot–scale test. Through experimental resu

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Samsudin, Salmi, Nuraini Abdul Aziz, Abdul Aziz Hairuddin, and Siti Ujila Masuri. "A Study on Bituminous Coal Base Acid Ratio to the Slagging Factor at Large Scale Boiler." International Journal of Heat and Technology 39, no. 3 (2021): 833–40. http://dx.doi.org/10.18280/ijht.390317.

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Different types of coal have different characteristics and performances. In thermal coal plant, deposition of coal ash inside the furnace causes slag formation inside the boiler rear path and consequently reduces the heat transfer process and boiler efficiency. Besides, accumulation of ash on the boiler tube surfaces form layers of slags and blocks the flue gas flow out of the boiler. Therefore, the purpose of this study is to investigate the relationship between sub-bituminous coal base acid ratio towards the heat transfer process inside large-scale boilers. The base acid ratio for sub-bitumi

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Rahman, HA, MIKA Aminuddin, R. Puspita, and MP Novendra. "Determination of Depositional Environment and Coal Rank of Seam C Sawahlunto Formation, Ombilin Basin, West Sumatera, Indonesia." Journal of Physics: Conference Series 2907, no. 1 (2024): 012017. https://doi.org/10.1088/1742-6596/2907/1/012017.

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Abstract The Sawahlunto Formation is a coal-rich geological formation in the Ombilin Basin, located in central Sumatera. It contains three main coal seams, designated as Seams A, B, and C, with Seam C known for its high-quality coal. The study involved analyzing coal samples from Seam C using petrographic and proximate analysis methods. Petrographic analysis assessed the macroscopic composition and vitrinite reflectance, which are essential for determining the depositional environment and coal rating. Proximate analysis provided additional data necessary for evaluating the coal’s quality. The

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Zhou, You, Boris Albijanic, Bogale Tadesse, et al. "Surface hydrophobicity of sub-bituminous and meta-bituminous coal and their flotation kinetics." Fuel 242 (April 2019): 416–24. http://dx.doi.org/10.1016/j.fuel.2019.01.051.

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Zdravkov, Alexander, Doris Groβ, Dragana Životić, Ivan Kojić, Ksenija Stojanović, and Achim Bechtel. "Preliminary petrographic assessment of the suitability of Bobov Dol coals, SW Bulgaria for fluidized-bed coal gasification." Review of the Bulgarian Geological Society 85, no. 1 (2024): 79–84. http://dx.doi.org/10.52215/rev.bgs.2024.85.1.79.

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Coal samples from seams Ia, I, IIa+b, III, IV, and V from the Bobov Dol deposit in SW Bulgaria were studied using optical microscopy and proximate analysis in order to determine their suitability for fluidized-bed gasification. The moderate- to high seam averaged ash yields and the huminite reflectance values in the range 0.43–0.5 classify the studied coals as medium- to very low grade, low-rank A (sub-bituminous) according to the International classification of in-seam coals. Based on the organic composition and ash yields, the coals from seams IIa+b, III, IV, and V seem more suitable for flu

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Aliyu, Aminu Safana, Nurhayati Abdullah, Fauziah Sulaiman, and Sadik Umar. "Combustion characteristics of palm pressed fibres biochar and sub-bituminous Malaysian coal." Malaysian Journal of Fundamental and Applied Sciences 14, no. 3 (2018): 334–37. http://dx.doi.org/10.11113/mjfas.v14n3.937.

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In this research, the combustion properties of coal and biochar were investigated and compared to identify the potentiality of biochar for coal replacement application. Biochar is derived from the pyrolysis of palm pressed fibre (PPF) at 400 oC. Thermogravimetric analysis (TGA) was used to study the combustion profiles of the materials. The biochar and coal were combusted via thermogravimetric analysis from ambient temperature to 800 oC at 10 oCmin-1 of heating rate. From the results, biochar showed the high calorific value of 27.30 MJkg-1compared to that of coal 26.21 MJkg-1. Furthermore, bio

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