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Analysis of Risk Factors for Underground Coal Gasification

Abstract

The purpose of this article is to determine the environmental impacts of underground gasification on the population and to analyze the risk of underground coal gasification (UCG) activities using selected risk assessment methods. Coal gas is a regular part of coal deposits and its extraction also allows the use of coal deposits that cannot be extracted by traditional methods. These technologies bring both positive and negative aspects. The paper points out the risk analysis, hazard identification and assessment during the operation of UCG technology using a risk graph and a risk matrix. Identified risks to workers that cannot be reduced should be taken into consideration and appropriate safeguard should be used. For each risk, it is necessary to inform employees about regular education and training. From worldwide experience with this technology, it is possible to analyze risks in Slovakia. Actual gasification produces polluting gases such as carbon dioxide, carbon monoxide, hydrogen sulphide, hydrogen sulphide, nitrogen oxides, tar and ash, and creates a risk that may occur on and under the surface of the site depending on the geological and hydrogeological structure of the deposits. Possible measures to mitigate the adverse effects are proposed for the implementation of this technology. Coal is still one of the main domestic primary energy sources. Currently, only 5 out of 19 deposits in the Slovak Republic are used. Underground gasification could increase the use of Slovak coal and brown coal deposits.

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Emission and commercial utilization of coal mine methane in the Upper Silesian Coal Basin illustrated by the example of Katowice Coal Holding Company

Abstract

The article deals with the issue of the release of methane from coal seams and its emission to the atmosphere from the mines of Katowice Coal Holding Company in the years of 1997-2011. This period is characterized by organizational changes in Polish mining industry involving liquidation or a merger of mines, an increase in both the concentration of coal mining activity, and the depth of the exploitation at which the amount of methane in coal seams grows ever larger. The analysis of the variation in the methane emission from the coal mines in that period points out a decline in the intensity of the emission until 2005, probably owing to the liquidation of some mines, later, but in the years of 2006-2010 - a considerable increase in both the absolute methane emission of the mines and the methane emission to the atmosphere despite a dropping coal extraction. This signifies that mining activity takes place in increasingly difficult gas conditions prevailing at great depths. Despite a slight decrease in both the absolute methane emission and methane emission to the atmosphere in 2011, a continuously growing trend of this phenomenon should be expected in the future. A similar tendency is also visible in the whole Upper Silesian Coal Basin, however the methane emission peak falls in 2008. In order to curb the growth of the amount of the emitted methane, it should be commercially utilized. Particularly vital is considering methane as an unconventional resource, following the example of other countries.

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Ecological and Economic Benefits and Safety of the Use of Coal Gas in Industry

Abstract

Possibilities Of Use Of Degassing And Carbon Gas In Industry. Degassing Gas Represents A Waste During Coal Mining So Far And This Issue Is Not Effectively Solved In Ostrava Region Up Till Now Ecological Aspects, Safety, Economic Aspects. Coal Deposits Represent A Special Case In Which The Deposit Is Both A Source Of Coal And Reservoir Of Gas. For The Thing Is That, In The Process Of Coalification Of Plant Residue, Coal Bed Gas Came Into Being Of Which The Main Component Is Methane. Gas From Mining Degassing Can Be Used As A Substitute Fuel For The Blowing Of Blast Furnaces. This Would Not Only Make It Possible To Reduce The Specific Consumption Of Coke, But Also Contribute To A Better Blast Furnace. An Economic Effect Is Also Negligible If We Characterize Degassing Gas As Waste Gas.

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The Use of a Unipore Diffusion Model to Describe the Kinetics of Methane Release from Coal Spoil in the Longwall Environment

metanu do przekopu przecinającego pokład węgla, Prace Naukowe GIG. Górnictwo i Środowisko, 2011, 4. [8] SKOCZYLAS N., WIERZBICKI M., Evaluation and Management of the Gas and Rock Outburst Hazard in the Light of International Legal Regulations, Archives of Mining Sciences, Dec. 2014, Vol. 59, Issue 4. [9] SKOCZYLAS N., Analyzing the parameters of the coal-gas system by means of a low-cost device based on a flow meter, Adsorption Science & Technology, Nov. 2015a, Issue 9. [10] SKOCZYLAS N., Estimating gas and rock outburst

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Preparation and characterization of multi-walled carbon nanotubes grown on transition metal catalysts

-walled nanotubes by laser vaporization. Chem. Phys. Lett. 243, 49-54. DOI: 10.1016/0009-2614(95)00825-O. 4. Qiu, J., An, Y., Zhao, Z., Li, Y. & Zhou, Y. (2004). Catalytic synthesis of single-walled carbon nanotubes from coal gas by chemical vapor deposition method. Fuel Process. Technol. 85, 913-920. DOI: 10.1016/j.fuproc.2003.11.033. 5. Sengupta, J. & Chacko, J. (2009). Growth temperature dependence of partially Fe fi lled MWCNT using chemical vapor deposition. J. Cryst. Growth 311, 4692-4697. DOI: 10.1016/j. jcrysgro.2009

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What are cleats? Preliminary studies from the Konin lignite mine, Miocene of central Poland

:] Law, B.E. & Rice, D.D. (Eds), Hydrocarbons from coal. American Association of Petroleum Geologists Studies in Geology 38, 119-132. Close, J.C. & Mavor, M.J., 1991. Influence of coal composition and rank on fracture development in Fruitland coal gas reservoirs of San Juan Basin. [In:] Schwochow, S.D. (Ed.), Coalbed methane of western North America. Rocky Mountain Association of Geologists, 109-121. Dadlez, R. & Jaroszewski, W., 1994. Tektonika [Tectonics].Polish Geological Press (Warszawa), 743 pp. (in Polish) Dadlez, R

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Technologies of coke wastewater treatment in the frame of legislation in force

]. Gaseous water is formed as a result of condensation of water vapour from coal gas in the process of its process of cooling down. The steam contained in the gas is derived from the moisture and decomposition of coal and process steam directly introduced into the gas. Coal water is released from the condensation of water and tar that are formed in gas receivers on coking battery, gas coolers, steam traps and closures of hydraulic gas pipelines. The amount of this water as well as it chemical composition, depends mainly on the quality of coal and coking technology

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A Closed Model for Energy Independent Production System in Cacao Processing Industry

, Lofland S, Loures L, Zhu L, editor. Advancesin Environmental Sciences, Development and Chemistry; 2014 Jul; Santorini Island, Greece. Santorini Island (GR): INASE. Hlm 217-220. 40. Sudibyo A. (2006). Techno-Economic Study on Establishment of Cocoa powder and Cocoa butter Industry in Makasar, South Sulawesi. Jurnal Riset Industri dan Perdagang , 4(1), 1-12. 41. Sulistyono D. (2012). Analisis Potensi Pembangkit Listrik Tenaga Gas Batubara di Kabupaten Sintang [Potential Analysis of Coal Gas Power Plants in Sintang District] Jurnal ELKHA , 4(2), 38

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Smell discrimination and identification scores in Thai adults with normosmia

Hospital, Mahidol University. Conflict of interest statement The authors have no conflicts of interest to declare. References 1 Chalke HD, Dewhurst JR. Accidental coal-gas poisoning. Loss of sense of smell as a possible contributory factor with old people. Br Med J. 1957; 2: 915-7. Chalke HD Dewhurst JR Accidental coal-gas poisoning. Loss of sense of smell as a possible contributory factor with old people Br Med J 1957 2 915 7 2 Rotem E, Kalish Y, Melhem A, Hirshberg B. A dangerous complication of chronic sinusitis. Am J Med. 2000; 108

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Experimental determination of the kinetics of sorption and gas filtration in coal

. (2016). The coal-gas system - the effective diffusion coefficient. International Journal of Oil Gas and Coal Technology 12 (4), 412-424. 10.1504/IJOGCT.2016.077300 Skoczylas N. Topolnicki J. 2016 The coal-gas system - the effective diffusion coefficient International Journal of Oil Gas and Coal Technology 12 4 412 – 424 [3] Sevenster, P.G. (1959). Diffusion of gases through coal. Fuel 38 403-418. Sevenster P.G. 1959 Diffusion of gases through coal Fuel 38 403 – 418 [4] Kudasik, M., Skoczylas, N. (2017). Analyzer for measuring gas

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