Results 241 to 250 of about 66,438 (265)
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GeoJournal, 1991
There is no doubt that Northern Ireland's lignite deposits are of high quality and constitute a natural resource of considerable potential value in this small, peripheral part of the European Community. Whether or not one or more will be used commercially and, if so, when depends on an interacting complex of economic, social and political factors.
C. W. Jeffersen, N. C. Mitchel
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There is no doubt that Northern Ireland's lignite deposits are of high quality and constitute a natural resource of considerable potential value in this small, peripheral part of the European Community. Whether or not one or more will be used commercially and, if so, when depends on an interacting complex of economic, social and political factors.
C. W. Jeffersen, N. C. Mitchel
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Energy & Fuels, 1994
The sulfur constituents in a Mequinenza lignite (Spain) were characterized using a variety of analytical techniques. The investigation was performed to provide information to scientists and engineers attempting to design methods to remove sulfur from coal and lignite, test new analytical methods directed at characterization of sulfur constituents in ...
Leo W. Collins +8 more
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The sulfur constituents in a Mequinenza lignite (Spain) were characterized using a variety of analytical techniques. The investigation was performed to provide information to scientists and engineers attempting to design methods to remove sulfur from coal and lignite, test new analytical methods directed at characterization of sulfur constituents in ...
Leo W. Collins +8 more
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Adsorption of cobalt by lignite
Hydrometallurgy, 1977Studies similar to earlier ones which had established the feasibility of extracting nickel by the lignite adsorption route were conducted on the adsorption extraction of cobalt on lignite, and with equal success. Optimal values of variables such as pH, sorbent/sorbate ratio, adsorbent particle size, contact time, temperature, and the effect of ...
M.J. Shahani, V.A. Altekar, A.K. Saha
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Microbial solubilization of lignites
Fuel, 2001Abstract Biological solubilization and subsequent gasification of lignite samples from three of the largest reserves in this country, which are also characterized by high sulphur contents and low calorific values, were investigated in this project.
Filiz B. Dilek +2 more
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The Utilization of Unsaleable Lignite Fines at Eskisehir Koyunagili Region Lignite Deposits
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2012Abstract Samples taken from stock piles of Koyunagili Lignites Company preparation plant were cleaned by means of gravity methods to obtain a saleable product. The optimum conditions of separation were determined under the laboratory conditions by using a shaking table and multi-gravity separator.
Aksoy, Derya Öz +2 more
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Spectral Classification of Lignite
Coke and Chemistry, 2020Abstract—Lignite is classified in terms of its diffuse reflectance IR spectrum, by soft independent modeling of class analogy (SIMCA).
V. K. Popov +2 more
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Lignite-Based Nitrogenous Fertilizers
Energy Sources, 1983A sample of lignite from Elbistan was oxidized by nitric acid in two stages, using relatively dilute acid in the first stage and concentrated acid in the second stage, and then the oxidized product was ammoniated so that a coal-based fertilizer could be produced. The experiments of all the stages were designed by a 1/2 X full factorial design.
DINCER, S, BARIS, H
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Beneficiation of the Greek Lignites
Coal Preparation, 2004This article is an overview on the beneficiation of the Greek lignites, one of the most important mineral commodities for Greece, with recoverable reserves amounting to about 4,000 Mt. This figure does not take into account a huge peat deposit. Almost all of the lignite mined annually (60 Mt/year) is used for energy production.
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The Washability of Lignites for Clay Removal
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2008Abstract In the washability research of the Seyitomer Lignites (Kutahya-Turkey), with lower calorific value (1,863 kcal/kg) and high ash content (51.91%), by heavy medium separation, it was found out that middling clay in the coal had an effect to change the medium density. To prevent this problem, a trommel sieve with 18 and 5 mm aperture diameter was
Öteyaka, B. +4 more
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Microbial desulfurization of lignite
Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology, 1994Abstract High sulfur containing lignite was investigated for the removal of sulfur content by bacterial cultures using shake flask experiments. The effect of bacterial action on unwashed and washed lignites with dilute acid was tested and found that the lignite does not require any pretreatment prior to microbial desulfurization process.
B.K. Handa +3 more
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