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 11 of 11 for “"Sulfide gas"”.
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Desenvolvimento de um sensor de fibras ópticas de sulfeto de hidrogênio baseado em redes de Bragg e Filmes Finos
Hydrogen sulfide is currently a major concern in oil industry, since it causes irreversible damage to both human resources employed in the activity (even leading to death) as well as to production itself, causing corrosion of pipelines and structures in oil processing or extrrcing plants. The …
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Polymer Surface Modification With Plasma Reaction For Materials Integration
… achieved using a plasma process with reactive gases to form functional groups. Advancing contact angles were measured after modification. Polystyrene surfaces were observed to reach a minimum average wetting contact angle of 7 degrees. The time required to achieve this contact angle decreased …
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Aplicação de termogravimetria acoplada à espectrometria de massas para caracterização de petróleo e determinação da curva de evolução de gás sulfídrico
With the new discoveries of oil and gas, the exploration of fields in various geological basins, imports of other oils and the development of alternative fuels, more and more research labs have evaluated and characterized new types of petroleum and derivatives. Therefore the investment in new …
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Performance of Acid-Gas Anaerobic Digestion for Minimization of Siloxane and Hydrogen Sulfide Produced in Biogas for Energy Recovery
… these compounds volatilize and enter the methane gas recovery stream. As the methane is combusted for energy cogeneration, these compounds become oxidized to microcrystalline silicon dioxide and cause damage and potential failure of expensive infrastructure. Adsorption and other catchment methods …
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Using 34-S as a Tracer of Dissolved Sulfur Species from Springs to Cave Sulfate Deposits in the Cerna Valley, Romania
… springs have high concentrations of dissolved sulfide gas (H2S) and dissolved sulfate (SO4²-).These dissolved species indicate the progression of sulfate reduction in the aquifer. Water samples were collected in polyethylene syringes to prevent oxidation of sulfide. Then, sulfide and sulfate …
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Nutritional capability of and substrate suitability for Pseudogymnoascus destructans, the causal agent of bat white-nose syndrome
… the reduction of thiosulfate generated hydrogen sulfide gas, chitinase and manganese dependent peroxidase activity were not visually demonstrated within eight weeks, and keratinase activity was not evident at pH 8 within eight weeks. We demonstrate that all P. destructans isolates are capable of …
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Winter Limnological Conditions in a PRAIRIE Pothole and the Application of Molecular Oxygen
… conditions after 19 January, 1978, and hydrogen sulfide gas reached a mean maximum (6.0 mg/L) on 12 February. Analysis of chemical parameters indicated increased chemical concentrations attributable to the "freezing out" of ions. A mean free carbon dioxide level increase from 0.95 mg/L to 59 mg/L …
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Block copolymers containing charge transport groups and semiconductor nanoclusters : synthesis, characterization, and optoelectronic applications
… and an alcohol block were synthesized. Cadmium sulfide nanoclusters were selectively synthesized within the spherical alcohol-functionalized microdomains, by treating the films with dimethylcadmium and hydrogen sulfide gas. The clusters were extremely small (less than 2 nm in diameter) and …
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Thin films of non-peripherally substituted liquid crystalline phthalocyanines A
… was exposed to 99.9 % pure hydrogen sulfide gas to produce hybrid nanocomposites consisting of lead sulphide quantum dots embedded in the analogous metal free phthalocyanine matrix. Trapping of charge carriers caused hysteresis in the current-voltage characteristics of the film on …
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Evaluating Biological Treatment Systems: (i) Moving Bed Biofilm Reactor versus Biological Aerated Filtration, and (ii) Sulfide-Induced corrosion in Anaerobic Digester Gas Piping
… on causes of deposition in anaerobic digester gas piping. The first section evaluated and compared the performance of a laboratory-scale MBBR and BAF for organic carbon and suspended solids removal. A kinetic study was also performed on the MBBR to evaluate the system performance. The purpose …
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Environmental tradeoffs of denitrifying woodchip bioreactors
… health problems. The production of greenhouse gases like carbon dioxide, nitrous oxide and methane are one concern. Unintended increases in these gases in bioreactors would effectively trade one problem for another with equally deleterious effects on the environment. This study is an …