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Showing 1 to 20 of 117 for “"Lignite"”.
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Autoclave Studies of Lignite Liquefaction
… at reaction temperature on the liquefaction of lignite using hydrogen or synthesis gas was studied. A slurry contain ing 200 grams of moisture-ash-free (MAF) lignite, 100 grams of water, and 400 grams of hydrogenated anthracene oil solvent was fed into the University of North Dakota …
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Activated Carbon from North Dakota Lignite
<p>Activated carbon was produced by reacting lignite char with steam in a fluidized-bed reactor which was designed and constructed for this study. Effects of three variables temperature, residence time and particle size, at four levels were studied statistically using a Latin square design. When …
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Studies with Primary Tar Distillate from Dakota Lignite
… on the formaldehyde resinification reaction with lignite tar distillate. This has an important bearing on the general problem.</p> <p>The experimental data and discussion of this thesis is proceeded by a general review of the more important literature pertaining to this subject.</p>
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Use of Lignite Fly Ash as a Soil Amendment
… in a greenhouse in potted mixtures of two Texas lignite fly ashes and a Troup sand, Sacul sandy loam, and a sandy clay loam strip-mine spoil. Mixtures contained 0, 25, 50, 75 and 100 percent fly ash. After six months, soil fly ash mixtures were analyzed for N, P, Ca, Mg, K, Na, Mn, Zn, pH, …
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The Production of Activated Carbon from North Dakota Lignite
… feasibility of producing activated carbon from lignite using a fluid bed reactor was investigated. Steam was used as the activating agent and was- reacted with carbonized lignite at elevated temperatures. The reaction was performed in a fluidized bed type reactor 1 l/2" in diameter and 24" in …
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Distribution of Five Elements in Lignite Liquefaction Process Streams
… and sodium was performed on the Project Lignite Coal Liquefaction Process Development Unit (PDU). Determinations of the concentrations of these elements in major flow streams were accomplished by both Neutron Activation Analysis (NAA) and Atomic Absorption (AA) methods of analysis. …
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Experiments in the Explosive Pulverization of North Dakota Lignite
… investigation aimed toward the up-grading of lignite coal. These investigations include steam drying, carbonation, briquetting, and gasification of North Dakota lignite. Research work by both the Bureau of Mines and the University of North Dakota is continuing and expanding at the present …
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A study of the colloid obtained from weathered lignite
<p> When Lignite is exposed to the action of weather it undergoes various changes, probably due to oxidation. Surface beds of lignite are often rejected by the miners as inferior coal, due to the weathered condition. But when this weathered lignite is treated with sodium hydroxide, and the …
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A Chemical Study of Lignite. Part II. The Volatile Constituents
University of Minnesota Masters thesis. May 1911. 1 computer file (PDF); 25 pages.
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The geohydrology and hydrogeochemistry of the proposed Garrison Lignite Mine
… study is a necessity before the opening of any lignite mine in North Dakota. The study becomes an important reference for the environmental impact during mining and after reclamation.</p> <p>This report is a groundwater study of the Proposed Garrison Lignite Mine, McLean County, North Dakota. …
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