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Showing 1 to 20 of 1845 for “"coal"”.
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Paleoecology and Taphonomy of Middle Pennsylvanian-Age Coal-Swamp Plants: Herrin Coal-Ball Peat and Coal, Peabody Camp 11 Mine, Herrin Coal, Western Kentucky
… for analyzing the flora of Pennsylvanian-age coal swamps directly from etched polished surfaces of coal. Vegetation of two coal-ball profiles and four coal-column samples from the Herrin Coal Member (Kentucky No. 11), Carbondale Formation at Peabody Coal Company's Camp 11 mine in western …
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Coal mass rating with regards to outburst and coal burst
Outbursts and coal bursts pose significant risks to underground coal mine workers. The burst propensity of a coal seam is represented by the three factors of the burst triangle: coal, energy, and isotropic mass. The most critical factor was determined to be isotropic mass controlling the storage …
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Experimental investigation of coal combustion in coal-laden methane jets
… of methane jets laden with pulverized coal were studied by using a vertically oriented solid particle injector that entrained pulverized coal particles using the Venturi effect. The dependence of entrainment rate on the size of coal particles was studied as a function of the flow rate. …
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Coal mine engineering
Made available in DSpace on 2016-11-09T23:47:49Z (GMT). No. of bitstreams: 2 5964247.pdf: 10522448 bytes, checksum: 04443ea845c9860b36b2dd8739636dfd (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1905
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Softening coal pyrolysis
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1985.
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Fine Coal Dewatering
Fine coal constitutes a relatively small portion of a product stream in a coal cleaning plant. However, its processing cost is approximately three times higher than the cost of processing coarse coal. Therefore, many coal companies chose to discard the fines to refuse ponds, causing a loss of …
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Pretreatment of coal by anodic electrolysis of acidified coal- water slurries
Pretreatment of Pittsburg seam B coals to decrease its ash content and increase its solvent extractable material was investigated by anodically electrolysing acidified coal-water slurries at potentials around 1.0V SCE. The effects of the pretreatment were examined as functions of coal particle …
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Coal was our life
… the provisional title being 'The North East Coalfields Facing Change: the Social and Economic Consequences of Pit Closures". The proposal was accepted and an Open University Regional Research Studentship awarded. The research was conducted between October 1993 and November 1996. This study …
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Fate of coal nitrogen
Thesis. 1976. Sc.D.--Massachusetts Institute of Technology. Dept. of Chemical Engineering.
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Supercritical extraction of coal
Supercritical extraction of coal is removal of a select fraction of the coal by a solvent which is slightly above its critical temperature and above its critical pressure. The objective of this dissertation was to understand the mechanism of supercritical extraction, to test some promising …
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NEW APPROACHES FOR MITIGATING ENVIRONMENTAL CONCERNS ASSOCIATED WITH COAL AND COAL COMBUSTION PRODUCTS
Currently, coal combustion plays an important role in meeting the energy needs of the United States. It is expected that the effective utilization of coal will be crucial for attaining energy independence for the nation in the next 25 to 30 years, if not longer. The United States burns about 20% of …
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Direct liquefaction of coal with coal-derived solvents to produce precursors for carbon products
Direct liquefaction (hydrogenation) of coal has frequently been pursued as one avenue for the production of value added products from coal. The focus of this research was to evaluate five coal-derived liquids as substitutes for tetralin in the coal hydrogenation process. A mid-distillate by-product …
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Economics of coal gasification-combined cycle and coal-fired plants for electric power generation
Includes bibliographical references (pages 92-98).
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Coal desulfurization with sodium hypochlorite
Wet desulfurization of Pittsburgh No. 8 coal and Illinois No. 6 coal were conducted with sodium hypochlorite in the laboratory. Pittsburgh No. 8 coal was leached by hypochlorite at high pHs in one step only. The hypochlorite concentration varied from 0.2 to 0.6 molar; sodium hydroxide …
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Coal Mining on Pitching Seams
A thesis submitted to the Department of Mining Engineering and the Faculty of the Graduate School in partial fulfillment of the requirements for the degree of Engineer of Mines.
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Coal tests under steam boilers
Made available in DSpace on 2016-11-09T23:47:50Z (GMT). No. of bitstreams: 2 5965654.pdf: 13185736 bytes, checksum: ba7c83510f31c0626b34e7cd3529da7a (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1906
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