Properties of Coal • Coal properties are evaluated by different methods. • The most commonly used methods are Proximate and Ultimate analysis of the coal. • Proximate analysis gives the Moisture, Ash and Volatile matter, while the Fixed Carbon is found by difference. • Ultimate Analysis gives the elemental composition of the coal. • Other methods like Macarel analysis is also used
Apr 27, 2007· ABSTRACT The effect of coal properties on the rheological properties of coal oil mixtures (COM) has been studied. Coal samples having different ash and moisture contents have been used to study the effect of these components on rheological properties of coal oil mixtures. It has been observed that coals having higher ash content give rise to less viscous coal oil mixtures and viscosity
Dec 02, 2016· Coal quality Indonesian coals are generally low in ash and sulphur, but on account of their low rank, they have a high content of volatile matter and moisture. The run-of-mine coal does not generally require preparation and simple crushing and screening suffices to produce a marketable product. The coal has nil or minimal coking properties,
This report examines the influence of coal properties on the emission of pollutants to the atmosphere. To illustrate this, four pollutants are considered. They are: sulphur oxides, nitrogen oxides, particulates, and trace elements. These pollutants are representative of the various impacts of the coal properties.
Influence of Ground Coal B ottom Ash on the Properties of Concrete Sajjad Ali Mangi 1,Mohd Hazima n Wan Ibrahim 1*,No rwati Jamaluddin 1,Sha hiron Shahidan 1
Feb 01, 2017· Adequate fusion properties and low ash percentage of coal are recommended to improve the economic benefit of gasification. For a membrane wall entrained flow gasifier, flow properties of coal slag will greatly influence the heat transfer, mass transfer and chemical reactions between the slag and the wall.
Modern coal-quality data and geologic field observations are interpreted in terms of the coal geology in a small area near Pocahontas, Va. Detailed chemical analyses and physical-property determinations of 12 channel-coal samples (reported on whole-coal and laboratory ash basis) indicate that the coals are mostly of high coking quality, low
Jun 22, 2018· Hitherto, there have been numerous investigations on the influence of coal properties such as rank, volatile matter, and maceral composition on the CO 2 adsorption on raw coals and coal chars 18-23. However, to the best of our knowledge, there have been a very limited number of investigations on the CO 2 adsorption capacities of gasified chars.
Jun 26, 2014· Chemical properties Physical Properties Heating Value: The heating value of coal varies from coal field to coal field. The typical GCVs for various coals are given in the Table 1.4. Table 1.4 GCV for Various Coals Parameter Lignite (Dry Basis) Indian Coal Indonesian Coal South African Coal GCV (kcal/kg) 4,500* 4,000 5,500 6,000 2.
Geologists also classify coal types according to the organic debris, called macerals, from which the coal is formed. Macerals (microscopic organic constituents found in coal) are identified (microscopically) by reflected light the reflective or translucent properties of the coal
ABSTRACT The effect of coal properties on the rheological properties of coal oil mixtures (COM) has been studied. Coal samples having different ash and moisture contents have been used to study the effect of these components on rheological properties of coal oil mixtures. It has been observed that coals having higher ash content give rise to less viscous coal oil mixtures and viscosity of the
This report examines the influence of coal properties on the emission of pollutants to the atmosphere. To illustrate this, four pollutants are considered. They are: sulphur oxides, nitrogen oxides, particulates, and trace elements. These pollutants are representative of the various impacts of the coal properties.
Jun 22, 2018· Hitherto, there have been numerous investigations on the influence of coal properties such as rank, volatile matter, and maceral composition on the CO 2 adsorption on raw coals and coal chars 18-23. However, to the best of our knowledge, there have been a very limited number of investigations on the CO 2 adsorption capacities of gasified chars.
Dec 12, 2011· Influence of Coal Properties . Properties effect on Specific Coal Consumption. The effect of various coal properties like ash content, moisture content, fixed carbon and calorific value on specific coal consumption in a typical thermal power station in India is analyzed. It is observed that the specific coal consumption is a strong function of
Coal Coal Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic (benzenelike) and
@article{osti_915489, title = {Influence of Shrinkage and Swelling Properties of Coal on Geologic Sequestration of Carbon Dioxide}, author = {Siriwardane, H J and Gondle, R and Smith, D H}, abstractNote = {The potential for enhanced methane production and geologic sequestration of carbon dioxide in coalbeds needs to be evaluated before large-scale sequestration projects are undertaken.
Apr 04, 2015· Coal Properties and its influence on Boiler Pankaj Ekbote NTPC Ltd. 2. What Indian and International Coals are like Characteristics Indian Indonesian South African Total Moisture % 10 20 10-30 8 Ash % 25 50 10-15 15-17 Volatile Matter % 16 30 25-35 23 Fixed carbon % 24- 40 45 51 Carbon % 30 55 60 70-80 Hydrogen % 2 4 4.5 4-5%
Jan 29, 2020· Germany and Indonesia nearly tie for the honor of top honors in the production of soft brown coal. These countries dug up 169 million and 163 million metric tons respectively. Coking vs. Steam: Coking coal, also known as metallurgical coal, has low sulfur and phosphorus content and can withstand high heat.
Jun 01, 2017· Indonesian coal production peaked at over 2 Mt per year (Mtpa) in 1941, just before the entry of Asia into World War 2 (van Bemmelen, 1949). At that time, about 30% of the total coal production was exported to other countries in the region. The majority of this production was from the Ombilin and Bukit Asam mines in Sumatra.
The mechanical property of coal, influencing mining activity considerably, is significantly determined by the natural fracture distributed within coal mass. In order to study the effecting mechanism of bedding structure on mechanical property of coal, a series of uniaxial compression tests and mesoscopic tests have been conducted. The experimental results show that the distribution
Elucidation of the Influence of Coal Properties on Coal-Char Reactivity: A Look at Southern Hemisphere Coals Andrew Odeha*, Samuel Ogbeideb and Charity Okieimenc Department of Chemical Engineering, University of Benin, Benin City, Nigeria Abstract
Influence of coal properties on the performance of fixed-bed coal-burning braziers Tafadzwa Makonese 1, Daniel M. Masekameni2*, Harold J. Annegarn 1 1 Sustainable Energy Technology and Research Centre, Faculty of Engineering and the Built Environment, University of Johannesburg, P. Bag 524, Auckland Park Bunting Road 2006, Johannesburg, South
Unlike, other properties, coal loses its fluidity on weathering, i.e. oxidation in presence of air on long storage in the yard, and the fluidity value changes on blending with different coals. To understand the effect of coal fluidity on coal blending and there by the coke quality, studies have been conducted using the industrial scale coals
price discrimination in Japanese coking coal markets. Clearly the question requires resolution before policy and strategy implications can be addressed. A possible methodology for investigating the issue involves the development of a theoretical model relating price to coal properties in the Japanese coking coal market. Cross-sectional testing
Coal Coal Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic (benzenelike) and
Elucidation of the Influence of Coal Properties on Coal-Char Reactivity: A Look at Southern Hemisphere Coals Andrew Odeha*, Samuel Ogbeideb and Charity Okieimenc Department of Chemical Engineering, University of Benin, Benin City, Nigeria Abstract
The presence of water is one of the most important factors in coal mining, and it has a dual influence on the mechanical behavior of rock. To study the influence of water content on the mechanical properties of coal under complicated stress conditions, dry coal specimens and wet coal specimens with water contents of 1.8% and 3.6% were conducted by uniaxial and conventional triaxial compression
Influence of coal properties on the performance of fixed-bed coal-burning braziers Tafadzwa Makonese 1, Daniel M. Masekameni2*, Harold J. Annegarn 1 1 Sustainable Energy Technology and Research Centre, Faculty of Engineering and the Built Environment, University of Johannesburg, P. Bag 524, Auckland Park Bunting Road 2006, Johannesburg, South
Sep 24, 1999· Grey System Theory is applied to study the influence of the coal properties on the emissions of nitric oxides from fluidized bed coal combustion. Grey correlation coefficients for the emissions of nitrous oxides and nitric oxides in relation to the contents of nitrogen and carbon, fixed carbon, volatile matter, nitrogen fractions in char, and volatile, and the O/N ratio, fuel ratio, etc., are
At OAO Zapadno-Sibirskii Metallurgicheskii Kombinat (ZSMK), research is undertaken to improve the optimization of coking batch. The basic approach, proposed by specialists from OAO Nizhne-tagil’skii Metallurgicheskii Kombinat, employs the coefficient K opt, which characterizes the deviation of the batch from its optimal composition. The coking properties of the OAO ZSMK coal batch over the
The mechanical property of coal, influencing mining activity considerably, is significantly determined by the natural fracture distributed within coal mass. In order to study the effecting mechanism of bedding structure on mechanical property of coal, a series of uniaxial compression tests and mesoscopic tests have been conducted. The experimental results show that the distribution
FIGURE 7-3. Variation of selected coal properties with coal rank. The chemical approach to characterizing coals is to determine the amounts of the principal chemical elements in them. In the jargon of the coal business, this procedure is called the ultimate analysis of coal. Carbon and hydrogen are the principal combustible elements in coal.
price discrimination in Japanese coking coal markets. Clearly the question requires resolution before policy and strategy implications can be addressed. A possible methodology for investigating the issue involves the development of a theoretical model relating price to coal properties in the Japanese coking coal market. Cross-sectional testing
Unlike, other properties, coal loses its fluidity on weathering, i.e. oxidation in presence of air on long storage in the yard, and the fluidity value changes on blending with different coals. To understand the effect of coal fluidity on coal blending and there by the coke quality, studies have been conducted using the industrial scale coals
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Influence of fire-ignition methods and air ventilation rates on gaseous and condensed matter (smoke) emissions from residential coal-burning braziers. Journal of Energy in Southern Africa 26(4): 16–28. Makonese, T., Masekameni, D., Annegarn, H. J. and Forbes, P. 2017 in press. Emission factors of domestic coal-burning braziers.
Abstract. Coal blend bulk density is an important property in the coking process. Some variables, such as moisture and particle size, which are controlled or measured in the coal beneficiation process in steel mills, exert a strong influence on this feature.
major role in the coal market since Indonesian coal benefits from low ash and sulfur contents. Due to the ideal geographic position for Asian coal demand, it is time to engage in the study of Indonesian metallurgical coal. Basic coal and coke analysis are undertaken to generalize the chemical and physical properties.
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