Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 99 for “"ash content"”.
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Analysis of ash content in Black Mesa coal by gamma-ray attenuation.
Thesis: M.S., Massachusetts Institute of Technology, Department of Physics, 1973
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Investigation of age related changes to porcine cortical bone using nanoindentation and ash content
… such as scanning electron microscopy (SEM) and ash content test are used to find supplemental data. This thesis is comprised of two different parts, which are to be submitted as two different journal publications. The second part in the thesis is a joint paper written by myself and a previous …
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Upgrading hydrothermal liquefaction biocrude oil from wet biowaste into transportation fuel
… Previous studies have revealed that excessive ash content in mixed-culture algal biomass (AW) appeared to reduce the higher heating value (HHV) and hydrocarbon compositions in the biocrude oil. To resolve this issue, physical pretreatments on AW biomass were carried out to decrease the ash …
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Coal resource characterization using the theory of coregionalized variables
… accuracy of estimation. Seam thickness, density, ash, calorific value, and sulphur have been studied to determine whether they are cross-correlated. Significant cross-correlations have been found to exist between ash content, density, and calorific value, where the rank of the coal is stable. A …
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Fine coal beneficiation: comparison study of the separation efficiency of a dense medium cyclone and flat-bottom cyclone
… density of the separating medium during coal washing. High levels of NGM in coal impede classifier separation efficiency because NGM particles have low settling rates, which hinder free particle movement during classification. Low-grade coal has a high ash and near-gravity material content, …
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Development of a video-based slurry sensor for on-line ash analysis
… been limited by the lack of adequate on-line ash sensors. Several nuclear based analyzers are available, yet none have seen widespread acceptance by the coal industry. This is due largely to their high cost, the influences of seam type and pyrite content on accuracy, and the inconvenience of …
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Effect of several insects on the chemical composition of alfalfa, red clover, and birdsfoot trefoil
… free extract and a reduction in crude fiber and ash content indicating slight reduction in growth. None of these differences were significant. On alfalfa the loss of xylem sap due to feeding caused a consistent general reduction of proteins, fat and ash content and an increase in dry matter and …
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Using froth flotation to mitigate acid rock drainage risks while recovering valuable coal from ultrafine colliery wastes
… has added value on account of its low sulfur and ash content. Success requires integration of flotation, aqueous chemistry and mineral bioleaching expertise. The approach adopted in this exploratory study entails coal flotation in the first stage, which takes advantage of its natural …
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Continuous Electrostatic Beneficiation And Surface Conditioning Of Coal
… A high volatile bituminous B coal having ash and sulfur contents of 13.3% and 0.21% respectively was used in the separation. The optimized parameters for the separations were experimentally determined. The effect of conditioning agents having different physical and chemical properties on …
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Physicochemical and flavor characterization of Tupelo honey
… seasons (2013 and 2014). These included moisture content, ⁰Brix, water activity (Aw), pH, titratable acidity, ash content, and fructose and glucose contents. On the basis of pollen analyses, nine samples could be considered as authentic Tupelo honeys, with one (designated honey 3 from the 2014 …
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A Study of Triboelectrification for Coal , Quartz and Pyrite
… particle feed rate, particle size, temperature, ash content, and the work functions of the materials that make up the in-line mixer. Evidence suggests that the charge transfer mechanisms of coal and mineral matter be due to electrons. A new turbocharger designed and developed in the present study …
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Ante- and post-mortem factors affect muscle protein functionality from fish
… myosin solubility, brined and cooked moisture content, and water activity, and increased fillet weight loss after brining, cook yield, actin solubility, water-phase salt content, and shear force. Brining time linearly increased myofibrillar protein solubility, fillet weight loss after brining, …
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ECOLOGY OF GRACILARIA TIKVAHIAE MCLACHLAN (GIGARTINALES, RHODOPHYTA) IN THE GREAT BAY ESTUARY, NEW HAMPSHIRE
… of the chemical composition, particularly agar content and properties, of plants separated into reproductive categories. The net photosynthetic responses of G. tikvahiae to several irradiance, temperature and salinity regimes were determined.</p><p>Gracilaria tikvahiae plants from the Great Bay …
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Evaluating of Thermal Treatment of Canola Dockage
… of seed pods with the bulk density of 73±5 g/l. Ash content and volatile matter of raw feedstock accounted for about 6.19±0.16% and 70.1±0.2% (w/w). The carbon, hydrogen, nitrogen, and sulfur content of raw canola dockage was obtained using Carbon, Hydrogen, Nitrogen, and Sulfur analysis and …
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Beneficiation of fine coal using the air-sparged hydrocyclone
The Air-Sparged Hydrocyclone (ASH) is a high capacity flotation device which is alleged to be more efficient for the flotation of fine particles than conventional flotation equipment. The principal aims of this thesis were to investigate the use of an ASH in the flotation of South African coal …
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Carbon products from coal liquefaction fractions
… pressure, solvent. Softening points, ash content and coking values of the samples are determined at WVU by ASTM methods. These samples were also examined for coke microstructure and mesophase formation. The asphaltene fraction is an especially attractive precursor and its properties …
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Creep and fracture of self-consolidating concrete incorporating fly ash
… of the cement paste and incorporating large content of powder fillers. This mix design of SCC was hypothesized to affect two critical criteria for concrete used in bridges: creep and crack propagation. Therefore, this study is focused on investigating creep and fracture toughness of SCC. …
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Geology and petrography of the Wellington Seam, Nanaimo Coalfield, Vancouver Island
… incident light in immersion oil. Moisture and ash content, and free swelling index were determined for the coals and mudstones. Seven formations and nine members, comprising the basal half of the Upper Cretaceous Nanaimo Group, crop out and are present in boreholes and mine shafts within the …
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Direct liquefaction of coal with coal-derived solvents to produce precursors for carbon products
… carbon-product precursors by softening point, ash content, coke yield, elemental analysis, and optical texture. (Abstract shortened by UMI.).
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