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Showing 1 to 20 of 36 for “"organic sulfur"”.
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Organic Sulfur-Bearing Species as Subsurface Carbon Storage Vectors
… for permanent subsurface sequestration. Natural sulfurization processes in sedimentary organic matter are investigated as mechanisms to generate biologically refractory water-soluble organic molecules. Such molecular vectors could be sequestered in shallow, saline, contaminated aquifers through …
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Organic Sulfur Utilization by the Chick: Nutritional and Metabolic Implications
Made available in DSpace on 2014-12-13T19:42:34Z (GMT). No. of bitstreams: 1 7524333.pdf: 3954885 bytes, checksum: 278a995a58d261259c49b2e66c566ca0 (MD5) Previous issue date: 1975
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Direct Measurement of Organic Sulfur Content in Coal Macerals and the Study of Pyrite Decomposition in Coal
Measurement has been made of the organic sulfur concentration in coal macerals of several bituminous coals. Variation of organic sulfur content among the maceral groups is striking. The average organic sulfur content of the major maceral groups has the progression S(exinite) > S(vitrinite) > …
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Marine sedimentary organic matter : delineation of marine and terrestrial sources through radiocarbon dating; and the role of organic sulfur in early petroleum generation
… project. All of the projects are related to the organic geochemistry of marine sediments, however, this is a fairly encompassing area of study. Chapters 1 and 2 stem from the same experimental study -the use of hydrous-pyrolysis to investigate mechanisms leading to the production of …
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Marine sedimentary organic matter: delineation of marine and terrestrial sources through radiocarbon dating; and the role of organic sulfur in early petroleum generation
… project. All of the projects are related to the organic geochemistry of marine sediments, however, this is a fairly encompassing area of study. Chapters 1 and 2 stem from the same experimental study -- the use of hydrous-pyrolysis to investigate mechanisms leading to the production of …
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Production of liquid and gaseous fuels from steam desulfurization of coal
… of Illinois coal is severely limited by its high sulfur content. Burning high sulfur coal produces corrosion and pollution problems. Illinois No.6 coal, in particular, contains a high percentage of organic sulfur. Organic sulfur cannot be removed by physical means.
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Identification and generation pattern of odor-causing compounds in dewatered biosolids during long-term storage and effect of digestion and dewatering techniques on odors
… and time of appearance of short-tem organic sulfur odors and persistent odors. Headspace analysis was used to quantify short-term odor-causing organic sulfur compounds and persistent odors from compounds such as indole, skatole, butyric acid and p-cresol for an incubation period up to …
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The reduction of organic compounds of sulfur by metals in liquid ammonia
1. A systematic study of the reduction of organic sulfur compounds by different metals in liquid ammonia is reported for the first time. 2. A metal with a high half-cell potential favors a greater extent of reduction than a lower potential metal. 3. The greater the concentration of ammonium ion as …
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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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Electron Transfer Processes between Hydrogen Sulfide and Humic Substances - Implications for Anaerobic Sulfur Cycling in Freshwater Ecosystems
… of biogeochemical gradients for turnover of organic matter is yet poorly understood. This study aims at the identification and quantification of the interaction of different redox processes along gradients with particular emphasis on the impact of redox active humic substances. The …
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Electrochemical Detection of Aliphatic Sulfur Compounds in Liquid Coal Extracts
The presence of sulfur compounds in coal is a serious environmental problem that affects the coal industry. This problem is due to the fact that organic sulfur is not separated or removed during any physical cleaning process. Organic sulfur is removed only during a more costly chemical …
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The use of organotellurium heterocycles as precursors for novel organometallic compounds
… Thiophenes have been used as models for organic sulfur in coal and their reactivity towards triiron dodecacarbonyl has been investigated. Reaction of unsubstituted thiophene with Fe3(CO)12 results in desulfurisation of the heterocycle, with the organic fragment being recovered in the form …
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Precombustion desulfurization of coal by photochemical methods and pyrite depression in froth flotation
The precombustion desulfurization of coal was investigated by photochemical methods and by the application of a novel pyrite depressant in froth flotation. Semiconductor photoelectrochemical catalysis was extensively examined. As much as 41% of the organic sulfur was removed and 72% overall …
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Specification of Sulfur Forms in Coal
Over a century of studies of the organic chemistry of coal has led to many accomplishments in coal chemistry. The recognition of the role that sulfur plays in coal makes the speciation of sulfur in coal one of the most important research goals. In this research solvent extraction, ultimate …
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Anaerobic Digestion: Factors Effecting Odor Generation
… showed that iron correlated well with headspace organic sulfur odor. In general, as the iron content of sludge increased greater amounts of odorous sulfur gases were produced from dewatered biosolids cakes. Aluminum did not show any relationship with organic sulfur odors. Parameters commonly used …
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Impacts of the use of magnesia versus iron on mesophilic anaerobic digestion and odors in wastewater
… digestion process and also lead to higher organic sulfur odors and deteriorating biosolids quality. The following research focuses on finding an alternative to the use of iron in wastewater systems by comparing the roles of iron and magnesium on mesophilic anaerobic digestion, the digested …
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Correlation of Electron Donor Concentrations in Sediments with Sediment Properties: New Providence, Iowa
… sand (coarse, medium, and fine), silt, clay, inorganic carbon contents and for the following electron donors: organic carbon, ferrous iron, and inorganic sulfide. A subset of sediment samples was analyzed for organic sulfur, but all of the 14 samples were below detection; therefore this …
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The Effect of Cations on Volatile Solids Destruction, Odors, and Dewatering in anaerobic digestion
… that volatile solids destruction and volatile organic sulfur compounds generation increased proportionally as iron content in influent increased. However, they decreased as aluminum content in influent increased. It was also found that as iron content in influent increased, higher optimum …
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A study of multi-stage sludge digestion systems
… anaerobic digestion system could increase organic sulfur-based odors from dewatered biosolids while placing a mesophilic digester reduced odors. It was exclusively observed from sludges containing high sulfate such as ones in this study. A combined anaerobic and aerobic sludge digestion …
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