Gotowe bibliografie tematyczne / Coal properties

Gotowa bibliografia na temat „Coal properties”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 19 lutego 2023

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Artykuły w czasopismach na temat "Coal properties"

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Wang, Guang Heng, i An Ning Zhou. "Effect of Coal Structure on Mechanical and Thermal Properties of Coal Filled Soy Protein Composites". Advanced Materials Research 236-238 (maj 2011): 288–91. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.288.

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Using different rank coals as filler, coal-soy protein isolate (SPI) composites were prepared by compression molding processing using glycerol as plasticizer. The structure of the coals used were characterized by Fourier transform infrared (FTIR), ultimate analysis, and surface functional group analysis. The effects of coal structure on the mechanical properties, water resistance, and thermal properties were investigated. The results showed that, in different rank coals, the atomic ratio of oxygen to carbon, carboxylic acid groups, phenolic hydroxyl groups, lactone bonds, and aliphatic chains decreased with coal rank. The strength, water resistance, and glass transition temperature of coal-SPI composites decreased with coal rank. Lower ran coal filler with more reactive functional groups caused the composites strong but brittle. While, higher rank coals provide poor mechanical properties for the composites.
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Morcote, Anyela, Gary Mavko i Manika Prasad. "Dynamic elastic properties of coal". GEOPHYSICS 75, nr 6 (listopad 2010): E227—E234. http://dx.doi.org/10.1190/1.3508874.

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Laboratory ultrasonic velocity measurements of different types of coal demonstrate that their dynamic elastic properties depend on coal rank and applied effective pressure. In spite of the growing interest in coal beds as targets for methane production, the high abundance in sedimentary sequences and the strong influence that they have on seismic response, little data are available on the acoustic properties of coal. Velocities were measured in core plugs parallel and perpendicular to lamination surfaces as a function of confining pressure up to [Formula: see text] in loading and unloading cycles. P- and S-wave velocities and dry bulk and dry shear moduli increase as coal rank increases. Thus, bituminous coal and cannel show lower velocities and moduli than higher ranked coals such as semianthracite and anthracite. The [Formula: see text] relationship for dry samples is linear and covers a relatively wide range of effective pressures and coal ranks. However, there is a pressure dependence on the elastic properties of coal for confining pressures below [Formula: see text]. This pressure sensitivity is related to the presence of microcracks. Finally, the data show that coal has an intrinsic anisotropy at confining pressures above [Formula: see text], the closing pressure for most of the microcracks. This intrinsic anisotropy at high pressures might be due to fine lamination and preferred orientation of the macerals.
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Antoshchenko, М. I., V. Yu Tarasov, О. I. Zakharova i Ye I. Zubtsov. "Research of vitrinite and fusinite coals for predicting geological hazards in coal seams". Мінеральні ресурси України, nr 3 (12.11.2020): 45–49. http://dx.doi.org/10.31996/mru.2020.3.45-49.

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To establish the necessity of dividing fossil coals into vitrinitic and fusinitic varieties in order to identify the hazardous properties of coal seams during mining. Methodology. The study of changes in conditional indices in the general ranking series was carried out according to DSTU 25543-2013 separately for the classification indicators of vitrinite and fusinite coals, as well as coal groups not assigned to the considered varieties. Changes in indices in the ranks of classification indicators allow us to identify the distinctive or unifying features of the construction of these series and provide suggestions for improving the regulatory documents of mining operations. Outcome. The safety of mining in Ukrainian coal mines is regulated by a number of regulatory documents that are based on genetic classification indicators of coal. One of the decisive factors of dividing coals by technological properties is their classification as vitrinitic or fusinitic, which is not taken into account by the regulatory framework when establishing the hazardous properties of coal seams. The analysis of distinctive properties acquired in the process of metamorphic transformations between vitrinite and fusinite coals has been carried out. It is established that the correlation indices (R2) of the relationship between conditional indexes of Ro, Vdaf and у ranking series with the conditional indices of the general ranking series by brand of coal are practically the same. In terms of Ro, the values of R2 for vitrinitic and fusinite coals were 0,9114 and 0,9221, respectively. Similar results were obtained for the Vdaf indicator, according to which it is impossible to establish differences in the degree of metamorphic transformations between vitrinite and fusinite coals. The characterizing values of the у indicator do not make it possible to establish the direction of change in the properties of coal. The used values of this indicator have a large scatter in the compilation of coal ranking. Scientific novelty. The nature of change in the classification indicators of industrial classification of coal for identifying the hazardous properties of coal seams in mining operations has been identified. Practical relevance. The possibility of improving the regulatory framework for safe mining of coal seams by establishing differences in the properties of vitrinite and fusinite coals.
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Li, Ping, Zhi Xin Wang, Sheng Dan Feng i Li Su. "Study on Ash Fusion Properties of the Ningdong Coal by Coal Blending". Advanced Materials Research 868 (grudzień 2013): 365–69. http://dx.doi.org/10.4028/www.scientific.net/amr.868.365.

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Coal blending is widely utilized in coal chemical industry and power plants, and ash slagging propensity, a non-additive property of the pure coals, is difficult to predict and related to its AFTs (ash fusion temperatures). A combustion experimental approach was undertaken to investigate the influence of coal blending ratio on the AFTs of three coal samples Sh-coal, Qi-coal, Que-coal from Ningdong mining areas. The results showed that a nonlinear decrease of the AFTs was obtained with the blending ratios (Sh-coal/Qi-coal or Sh-coal/Que-coal) increasing, the AFTs dropped by 30 °C from 0.5 to 0.8 ratio; the content of Al2O3 can be obviously lowered AFTs. Therefore, coal blending could lower the AFTs evidently. The obtained results in this research can be used in coal gasification process and further theoretical studies.
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Kumar, Deepak, H. P. Tiwari, Vinod K. Saxena, Binod K. Khullar, Ranjan K. Singh i Sandip K. Bhattachryaa. "Effects of natural weathering on intrinsic properties of coal and coke quality". Metallurgical Research & Technology 116, nr 1 (18.12.2018): 111. http://dx.doi.org/10.1051/metal/2018048.

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The degree of weathering of coking coal and its influence on coking potential of coal and coke strength after reaction depends on the various factors viz., climatic conditions, origin and types of coal. Results indicate that weathering of coking coal significantly affects the rheological properties, i.e. free swelling index, maximum fluidity, initial softening temperature, plastic temperature range and maximum expansion. Furthermore, the carbonization study confirms that the deterioration in coke strength after reaction also depends on the type of coals. It is therefore imperative to minimize weathering time of coking coals, and all-out efforts must be taken to cut down the cycle time from mining to its end use for techno-commercial utilization of a particular coal.
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El-Tawil, Asmaa A., Bo Björkman, Maria Lundgren, Astrid Robles i Lena Sundqvist Ökvist. "Influence of Bio-Coal Properties on Carbonization and Bio-Coke Reactivity". Metals 11, nr 11 (31.10.2021): 1752. http://dx.doi.org/10.3390/met11111752.

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Coke corresponds to 2/3–3/4 of the reducing agents in BF, and by the partial replacement of coking coals with 5–10% of bio-coal, the fossil CO2 emissions from the BF can be lowered by ~4–8%. Coking coal blends with 5% and 10% additions of bio-coals (pre-treated biomass) of different origins and pre-treatment degrees were carbonized at laboratory scale and with a 5% bio-coal addition at technical scale, aiming to understand the impact on the bio-coal properties (ash amount and composition, volatile matter content) and the addition of bio-coke reactivity. A thermogravimetric analyzer (TGA) connected to a quadrupole mass spectroscope monitored the residual mass and off-gases during carbonization. To explore the effect of bio-coal addition on plasticity, optical dilatometer tests were conducted for coking coal blends with 5% and 10% bio-coal addition. The plasticity was lowered with increasing bio-coal addition, but pyrolyzed biomass had a less negative effect on the plasticity compared to torrefied biomasses with a high content of oxygen. The temperature for starting the gasification of coke was in general lowered to a greater extent for bio-cokes produced from coking coal blends containing bio-coals with higher contents of catalyzing oxides. There was no significant difference in the properties of laboratory and technical scale produced coke, in terms of reactivity as measured by TGA. Bio-coke produced with 5% of high temperature torrefied pelletized biomass showed a similar coke strength as reference coke after reaction.
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Rudniev, Yevhen, Mykola Antoshchenko, Elvira Filatieva i Julia Romanchenko. "ON THE INFLUENCE OF MINERAL IMPURITIES ON THE MANIFESTATION OF DANGEROUS PROPERTIES OF COAL SEAMS". JOURNAL of Donetsk Mining Institute, nr 2 (2021): 85–95. http://dx.doi.org/10.31474/1999-981x-2021-2-85-95.

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Purpose: to establish a possible correspondence between metamorphic processes with artificial thermal destruction of coals and their ashing in order to identify the components of mineral impurities that can affect the manifestation of the hazardous properties of coal mine seams. Methodology is based on a comparison of metamorphic processes that took place at a certain temperature mode in the bowels of the Earth and the production of artificial coals and their ashing. Results: The research made it possible to reveal the important role of mineral impurities in the formation of the hazardous properties of coal seams. This is due to both the significant possible content of mineral impurities in fossil coals, and the simultaneous presence of the main components that determine the hazardous properties of coal seams (carbon, hydrogen, sulfur, oxygen and moisture), both in the organic and in the mineral parts of fossil coals. To improve the regulatory framework for the safe conduct of mining operations, it is necessary to take into account features of the properties of fossil coals due to the presence of mineral impurities in them. In modern regulatory documents on the safe conduct of mining operations, in general, several indicators are used without proper scientific justification: the mass yield of volatiles during the thermal decomposition of coal, the volumetric yield of volatile substances, the thickness of the plastic layer and the logarithm of the electrical resistivity of anthracites. Their values are related to the dry ash-free mass of organic matter only. This excludes consideration of the influence of mineral impurities on the manifestation of the hazardous properties of coal mine seams during mining operations. In many cases, the content of moisture and sulfur is a criterion for the manifestation of hazardous properties of coal seams. They belong to the integral components of both organic and mineral constituents of fossil coals. The share of mineral impurities in the coals of individual coal seams can be more than 40%. The presence of oxygen, hydrogen, sulfur and moisture in mineral impurities significantly affects the manifestation of the hazardous properties of coal seams during mining. The content of mineral impurities in fossil coals in engineering calculations can be determined on the basis of the ash content of coals according to known empirical relationships, corrected for the content of total sulfur and, in some cases, carbon dioxide. Scientific novelty: the significant influence of mineral impurities in fossil coals on the manifestation of hazardous properties of coal seams during mining operations has been proved. Practical value: the results obtained allow substantiating the methodology for the combined use of the composition of organic and mineral components of fossil coals for a reliable forecast of the manifestation of hazardous properties of coal seams and improving the regulatory framework for their safe mining.
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Steer, Julian, Mark Greenslade i Richard Marsh. "A Comparison of Laboratory Coal Testing with the Blast Furnace Process and Coal Injection". Metals 11, nr 9 (17.09.2021): 1476. http://dx.doi.org/10.3390/met11091476.

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The injection of coal through tuyeres into a blast furnace is widely adopted throughout the industry to reduce the amount of coke used and to improve the efficiency of the iron making process. Coals are selected depending on their availability, cost, and the physical and chemical properties determined by tests, such as the volatile matter content, fixed carbon, and ash content. This paper describes research comparing the laboratory measured properties of injection coals that were used over a two-month production period compared to the process variables and measurements of the blast furnace during that study period. In addition to the standard tests, a drop tube furnace (DTF) was used to compare the burnout of coals and the char properties against the production data using a range of statistical techniques. Linear regression modelling indicated that the coal type was the most important predictor of the coal rate but that the properties measured using laboratory tests of those coals were a minor feature in the model. However, comparisons of the Spearman’s correlations between different variables indicated that the reverse Boudouard reactivity of the chars, prepared in the DTF from the coals, did appear to be related to some extent to the coal and coke rates on production. It appears that the constant process adjustments made by the process control systems on the furnace make it difficult to identify strong correlations with the laboratory data and that the frequency of coal sampling and the coal blend variability are likely to contribute to this difficulty.
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Nyakuma, Bemgba Bevan, i Aliyu Jauro. "Chemical and Pyrolytic Thermogravimetric Characterization of Nigerian Bituminous Coals". GeoScience Engineering 62, nr 3 (1.12.2016): 1–5. http://dx.doi.org/10.1515/gse-2016-0017.

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Abstract The discovery of new coal deposits in Nigeria presents solutions for nation’s energy crises and prospects for socioeconomic growth and sustainable development. Furthermore, the quest for sustainable energy to limit global warming, climate change, and environmental degradation has necessitated the exploration of alternatives using cleaner technologies such as coal pyrolysis. However, a lack of comprehensive data on physico-chemical and thermal properties of Nigerian coals has greatly limited their utilization. Therefore, the physico-chemical properties, rank (classification), and thermal decomposition profiles of two Nigerian bituminous coals – Afuze (AFZ) and Shankodi-Jangwa (SKJ) – were examined in this study. The results indicate that the coals contain high proportions of C, H, N, S, O and a sufficiently high heating value (HHV) for energy conversion. The coal classification revealed that the Afuze (AFZ) coal possesses a higher rank, maturity, and coal properties compared to the Shankodi-Jangwa (SKJ) coal. A thermal analysis demonstrated that coal pyrolysis in both cases occurred in three stages; drying (30-200 °C), devolatilization (200-600 °C), and char decomposition (600-1000 °C). The results also indicated that pyrolysis at 1000 °C is not sufficient for complete pyrolysis. In general, the thermochemical and pyrolytic fuel properties indicate that the coal from both places can potentially be utilized for future clean energy applications.
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Oskay, R. G., H. Inaner, A. I. Karayigit i K. Christanis. "Coal deposits of Turkey: properties and importance on energy demand". Bulletin of the Geological Society of Greece 47, nr 4 (5.09.2013): 2111. http://dx.doi.org/10.12681/bgsg.11106.

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In the last two decades electricity generation and consumption in Turkey was increasing steadily. Around 80% of the electricity generated is derived from fossil fuels such as imported natural gas and oil, and domestic coal. As the energy policy now is focusing on reducing the dependency on imported fuels, coal, particularly this of low-rank, is becoming important for the country. Latest explorations showed that total coal reserves of Turkey reach to 13 Gt with low-rank coals (i.e. lignite and sub-bituminous) being dominant. Coal deposits, formed under various conditions and in various geological times, are widely spread over the territory. The most significant deposits are of Tertiary, especially Neogene age. Neogene coals are most appropriate for combustion in the thermal power plants due to the high total reserves despite the high ash yields and the low calorific values. We imply that applying reasonable exploitation planning and appropriate washing techniques, coal will play a key role in future energy supply of the country.
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Rozprawy doktorskie na temat "Coal properties"

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Moreea, Ruksana Goolam Hossen. "Effects of solvents and coal properties in coal liquefaction". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324958.

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Boykov, Nikolay D. "Measurements of the electrical properties of coal measure rocks". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4715.

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Thesis (M.S.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains xi, 89 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 88-89).
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Walker, Rachel Inez. "Insights into the coking behavior of southern Indiana coals bulk coal properties and individual maceral chemistries /". [Bloomington, Ind.] : Indiana University, 2005. http://wwwlib.umi.com/dissertations/fullcit/3167284.

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Thesis (Ph. D.)--Indiana University, Dept. of Geological Sciences, 2005.
Title from PDF t.p. (viewed Dec. 3, 2008). Source: Dissertation Abstracts International, Volume: 66-03, Section: B, page: 1355. Co-Chairs: Maria Mastalerz; Simon Brassell.
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Oztoprak, Ayse Feray. "Investigation Of The Rheological Properties Of Cayirhan Coal-water Mixtures". Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607861/index.pdf.

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In this thesis, coal-water mixtures (CWM) with Ç
ayirhan lignite were prepared to optimize the parameters of CWM having an ideal behavior which means that at maximum coal loading, relatively stable at static and dynamic conditions and exhibit low viscosity. For this purpose, the effect of the parameters such as pulp density, amount of chemical agents, particle size distribution, addition of methanol and pulp pH were investigated. Results showed that increasing pulp density negatively affects viscosity and allowable maximum pulp density was obtained as 60% when the particle size distribution has a d50 value of 22.82 µ
m. The optimum amount of chemical agent was found as 0.9%, having 10% Na-CMC (Sodium Carboxymethyl Cellulose) and 90% PSS (Polystyrene Sulfonate). Minimum viscosity was achieved when the pulp pH was in natural conditions (pH=6.85). Addition of methyl alcohol increased the viscosity of CWM.
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Man, Chi-Keung. "Some properties of cokes produced from high pressure carbonisation of coals". Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/11844.

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The British Gas Lurgi slagging gasifier is a counter-current fixed bed gasifier operating at high pressure. Coal descending the gasifier is pyrolysed to form coke which is then gasified. Properties of such coke affect the gasifier in its efficiency of operation. This thesis describes a) the carbonisation of cokes from coal under simulated gasifier conditions, b) the characterisation of the resultant cokes in terms of structure and physical properties and, c) the formulation of relationships between coal thermoplasticity and coke properties. Three high-volatile bituminous coals Manvers Barnburgh NCB 702, and Gedling (Manton NCB 502, NCB 802) were carbonised in an autoclave under a range of pressures (0.5- 8.0 MPa), using two different heating regimes, shock heating to 700 °c and slow heating to 700 °c at 5 °C/min. Physical characterisation of the resultant cokes was carried out using optical and mechanical techniques. Optical anisotropy and image analysis were used to determine coke structure and porosity respectively. Tensile strength, microstrength and abrasion resistance were measured to establish the cokes' resistance to various forms of breakage. High pressure dilatometry and plastometry were used to measure the effects of pressure and heating rate on coal thermoplastic properties. Relationships between coal thermoplastic properties and coke properties are very complex. This work has shown that these relationships are highly dependent on carbonisation conditions with heating rate rather than pressure being the more dominant parameter.
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Heidenreich, Craig. "Mathematical modelling of large low-rank coal particle devolatilization /". Title page, summary and contents only, 1999. http://web4.library.adelaide.edu.au/theses/09PH/09phh4653.pdf.

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Sloan, Elizabeth Patricia. "The influence of feedstock properties on gasification plant performance". Thesis, University of Ulster, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241681.

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Gurgenli, Hakan. "Geomechanical and weathering properties of weak roof shales in coal mines". Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4717.

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Thesis (M.S.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains ix, 99 p. : ill. (some col.), maps (part col.). Includes abstract. Includes bibliographical references (p. 77-81).
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Stewart, Barry Robert. "Physical and chemical properties of coarse coal refuse from Southwest Virginia". Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03142009-040755/.

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Stewart, Barry R. "Physical and chemical properties of coarse coal refuse from Southwest Virginia". Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41626.

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Coarse coal refuse is difficult to reclaim due to high potential acidity and coarse fragment content, low water holding capacity, low fertility, and other problems. Little is known about coal refuse properties, particularly as they relate to revegetation potential. This study was undertaken to determine the physical and chemical properties of composite samples from 27 coal waste piles of varying age. Selected physical and chemical properties varied widely across this sample set. The mean coarse fragment (>2mm) content of these materials was 60%. The average texture of the fine (<2mm) fraction was a sandy loam with 15% clay. The mean water retention difference, between 0.03 MPa and 1.5 MPa of soil moisture tension, on a whole sample basis was 0.08 g water/g refuse. The pH values varied from 8.3 to 3.0, and the older piles generally had lower pH values than the more recent piles. The saturated paste electrical conductivity (EC) was higher in the younger coal waste materials. Total elemental analysis revealed that Si, Al, Fe, and K were the most abundant elements in these materials. The mineralogy of three selected samples was found to be dominated by quartz in the sand and silt fraction and mica in the clay fraction. The physical factor most limiting to plant growth was found to be low water holding capacity. Low pH was found to be the chemical factor most limiting to plant survival. These findings indicate that some refuse piles may be suitable for direct seeding, but many will require heavy lime and/or organic treatments.
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Książki na temat "Coal properties"

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Fusaro, Robert L. Tribological properties of coal slurries. [Washington, DC]: National Aeronautics and Space Administration, 1987.

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Braun, E. Self heating properties of coal. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, National Engineering Laboratory, Center for Fire Research, 1987.

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Braun, E. Self heating properties of coal. Gaithersburg, MD: U.S. Dept. of Commerce, National Bureau of Standards, National Engineering Laboratory, Center for Fire Research, 1987.

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Tsonopoulos, Constantine. Thermodynamic and transport properties of coal liquids. New York: Wiley, 1986.

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Puri, V. K. Geotechnical properties of coal mine slurry waste. S.l: s.n, 1989.

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Alberta. Alberta Energy. Research and Technology Branch. Studies of some fundamental properties of coal and potential uses for coal. Edmonton, Alta: Alberta Energy Research and Technology Branch, 1991.

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Matheson, A. Producing and developing thermal coal properties in British Columbia. Victoria, B.C., Canada: Mineral Resources Division, Geological Survey Branch, 1989.

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Usenbaev, K. Teploemkostʹ iskopaemykh ugleĭ i termodinamika ugleobrazovatelʹnogo prot͡s︡essa. Frunze: Izd-vo "Ilim", 1989.

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Maksimovic, S. D. Basic geological and analytical properties of selected coal seams for coal interface detection. Washington, D.C: United States Dept. of Interior, Bureau of Mines, 1993.

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Ondik, Helen M. Construction materials for coal conversion: Performance and properties data. Washington,D.C: National Bureau of Standards, 1985.

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Części książek na temat "Coal properties"

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Cheng, Yuanping, Qingquan Liu i Ting Ren. "Gas Adsorption–Desorption Properties of Coal". W Coal Mechanics, 111–50. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3895-4_4.

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Cheng, Yuanping, Qingquan Liu i Ting Ren. "Seepage Properties and Permeability Evolution Model of Coal". W Coal Mechanics, 243–335. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3895-4_7.

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Cheng, Yuanping, Qingquan Liu i Ting Ren. "Basic Physical Properties and Characteristics of Coal Pores and Fractures". W Coal Mechanics, 77–110. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3895-4_3.

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Smoot, L. Douglas, i Philip J. Smith. "Solid Fossil Fuels (Mostly Coal): Processes and Properties". W Coal Combustion and Gasification, 7–36. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4757-9721-3_2.

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Kizgut, Sait, i Mehmet Bilen. "Petrographic properties with respect to VM content of coal". W XVIII International Coal Preparation Congress, 433–37. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-40943-6_65.

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Allen, David T., i Leonidas Petrakis. "Estimating Thermophysical Properties of Coal Liquids Using NMR Spectra". W New Trends in Coal Science, 187–96. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3045-2_8.

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Baldwin, Robert M. "Correlation of Coal Properties with Hydroliquefaction Reactivity". W ACS Symposium Series, 171–81. Washington, DC: American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0461.ch013.

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Shahidan, Shahiron, i Nurul Izzati Raihan Ramzi Hannan. "Mechanical Properties of CBA Concrete". W Acoustic And Non-Acoustic Performance Coal Bottom Ash Concrete, 47–63. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7463-4_6.

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Guo, Feihong, Zhaoping Zhong, Heng Wang, Zeyu Xue i Jin Zhang. "Flow Properties of Coal and Biomass on Recurrence Plot Method". W Clean Coal Technology and Sustainable Development, 309–16. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2023-0_41.

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Wu, Di. "Properties of Cemented Coal Gangue-Fly Ash Backfill". W Mine Waste Management in China: Recent Development, 127–94. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9216-1_9.

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Streszczenia konferencji na temat "Coal properties"

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Kieush, L., i A. Starovoit. "Carbon Nanomaterials from Coal Pyrolysis Products". W 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP). IEEE, 2018. http://dx.doi.org/10.1109/nap.2018.8915065.

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Liu, Sheng, i Yingli Hao. "A Critical Review of Slag Properties of Chinese Coals for Entrained Flow Coal Gasifier". W ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43307.

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Numbers of entrained flow coal gasifiers have been built in China. In China, the coal types are various and the properties between coals from different collieries are quite different causing the properties of slag different too. The experimental data for slag properties of Chinese coal are collected and critically reviewed, especially for the conditions in entrained flow coal gasifiers. The most widely used models for predicting the fusion characteristics and viscosity of Chinese coal ash slags are compared. The most suitable models for fusion characteristics and viscosity of Chinese coal ash slags are recommended. For other properties, empirical models with widely suitability are also recommended.
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Chudnovsky, B., i A. Talanker. "Effect of Bituminous Coal Properties on Heat Transfer Characteristic in the Boiler Furnaces". W ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59182.

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Over the past years experience has been gained in employing changing types of imported coal. Apart from the proximate analysis this led to development of evaluation criteria regarding the operation of coals. These are criteria numbers obtained from operational experience and criteria numbers used for the characterization of specific operational properties on the basis of special laboratory analyses. The study evaluates the effect of the characteristics of pulverized coal on the furnace fouling and radiation heat transfer. The aim of the study was to access whether fouling and radiation heat transfer could be predicted from coal characteristics. The paper presents the experimental results on the fouling propensity of fifteen coals tested in a 575 MW combustion engineering tangential firing boiler. The results showed that no coals produced a strong molten deposit. In order to rank the fouling propensity and radiation heat transfer properties numerically, we measured the profile of incident heat fluxes, defined furnace exit flue gas temperature and absorbed heat fluxes. The basic molar ratio correlates the fouling propensity. Besides that increasing of SiO2 and Al2O3 content in the ash strongly reduces water wall absorptivity factor. The present work is also concerned with the effect of different bituminous coal on their flame emissivity. Using the radiation properties of flue gases derived from the full scale experiments, we run computational fluid dynamics (CFD) on the combustion process. The known fouling and radiation heat transfer properties enable the prediction of the effect of coal quality on the performance of a specific boiler.
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Li, Maotong, Chuanxiao Liu, Huaqing Yang, Yuanchao Zhou i Jiashu Liang. "Study on Temperature Effect of Concrete Mechanical Properties". W 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection". Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/coal-18.2018.45.

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Kavak, Orhan. "THE�SECOND�PALEOZOIC�COAL�OF�TURKEY,�DIYARBAKIR-HAZRO�COALS�AND�THEIR�PROPERTIES". W SGEM2012 12th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2012. http://dx.doi.org/10.5593/sgem2012/s05.v2013.

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Zhang, Yan, i Jun Zhang. "Engineering properties of cement with coal gangue". W 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5774392.

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Yao, Qiuliang, i De‐hua Han. "Acoustic properties of coal from lab measurement". W SEG Technical Program Expanded Abstracts 2008. Society of Exploration Geophysicists, 2008. http://dx.doi.org/10.1190/1.3059254.

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Li, Maotong, Chuanxiao Liu, Huaqing Yang, Yuanchao Zhou i Jiashu Liang. "Experimental Study on Mechanical Properties of Granite at Different Damage Degrees". W 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection". Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/coal-18.2018.49.

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Degereji, Mohammed U. "Numerical Assessment of the Slagging Potential of Nigerian Coal for Possible Co-Firing". W ASME 2015 9th International Conference on Energy Sustainability collocated with the ASME 2015 Power Conference, the ASME 2015 13th International Conference on Fuel Cell Science, Engineering and Technology, and the ASME 2015 Nuclear Forum. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/es2015-49781.

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Co-firing coal and biomass offers a sustainable renewable energy option. However, slagging and fouling have been identified as some of the major operational challenges associated with co-firing. The chemistry of individual fuels can be used to determine the slagging potential of the blend. Previously, we have developed a numerical slagging index (NSI) based on the ash content in coal and the chemical properties of the coal ash. The NSI has been tested on a wide range of coals, and very good prediction results were obtained. In this paper, the slagging potential of Nigerian coal and other coals from Australia, Colombia and South Africa have been numerically evaluated. The predicted results using the NSI indicate that the Nigerian coal has relatively low slagging propensity when compared with other coals tested in this paper. One of the Australian coals seems to have lower slagging potential, and this may be attributed to the extraordinary low ash content for the coal, as reported. It has been observed that the silica-rich coal ash composition can be used to select suitable coals that could be co-fired with the alkali-rich biomass, with low operational risk. However, detail information on the chemical properties of blend and the particle-particle interaction can improve the performance of the assessment tool.
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Petrasova, Tatana. "DETERMINATION OF DUMP MATERIAL PROPERTIES FROM COAL MINE BILINA". W 15th International Multidisciplinary Scientific GeoConference SGEM2015. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2015/b12/s2.032.

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Raporty organizacyjne na temat "Coal properties"

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Braun, Emil. Self heating properties of coal. Gaithersburg, MD: National Bureau of Standards, 1987. http://dx.doi.org/10.6028/nbs.ir.87-3554.

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Im, K. H., i R. K. Ahluwalia. Radiation properties of coal combustion products. Office of Scientific and Technical Information (OSTI), listopad 1990. http://dx.doi.org/10.2172/5000936.

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Fuerstenau, D. W. Surface properties of coal and their role in coal beneficiation. Office of Scientific and Technical Information (OSTI), październik 1989. http://dx.doi.org/10.2172/5500499.

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Fuerstenau, D., i J. Diao. Surface properties of coal and their role in coal beneficiation. Office of Scientific and Technical Information (OSTI), marzec 1990. http://dx.doi.org/10.2172/6933184.

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Kwon, K. C. Liquid chromatographic analysis of coal surface properties. Office of Scientific and Technical Information (OSTI), grudzień 1992. http://dx.doi.org/10.2172/7148930.

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Kwon, K. C. Liquid chromatographic analysis of coal surface properties. Office of Scientific and Technical Information (OSTI), kwiecień 1992. http://dx.doi.org/10.2172/5099772.

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Donohue, M. D. Prediction of thermodynamic properties of coal derivatives. Office of Scientific and Technical Information (OSTI), październik 1991. http://dx.doi.org/10.2172/5543252.

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Chander, S., i F. F. Aplan. Enhancement of surface properties for coal beneficiation. Office of Scientific and Technical Information (OSTI), styczeń 1990. http://dx.doi.org/10.2172/6409667.

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Donohue, M. D. Prediction of thermodynamic properties of coal derivatives. Office of Scientific and Technical Information (OSTI), wrzesień 1990. http://dx.doi.org/10.2172/5898944.

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Kwon, K. C. Liquid chromatographic analysis of coal surface properties. Office of Scientific and Technical Information (OSTI), styczeń 1992. http://dx.doi.org/10.2172/7258084.

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