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 12 of 12 for “"Carbon dioxide content"”.
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Effect of processing and storage conditions upon canned apple sauce headspace gas composition
… sauce, and in cans with higher vacuum. Maximum carbon dioxide content was noted in samples having a pH value of 3.45. Samples with more fluid consistency had more headspaoe carbon dioxide than those of higher consistency. Variations in headspaoe carbon dioxide content occurred in direct …
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Determination of the operating characteristics of an absorption tower
… of the tower in the absorption of carbon dioxide by water were performed, after the changes in design were made. A distribution plate to reduce channeling, a sampling system to insure the obtaining of representative samples, and modified Orsat apparatus to permit greater accuracy of …
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Investigating Palaeoatmospheric Composition-Climate Interactions
… with different assumptions about the sulfur dioxide and halogen loadings based on a recent geochemical reconstruction. These show a muted climate response, in reasonable agreement with tree ring records. Emissions of halogenated compounds lead to an increase in the sulfur dioxide lifetime, …
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The oxidation of ethylene to ethylene oxide
… of that suggested by Vaughan and Wiseman. The carbon dioxide content of the product gases was determined by absorption of the carbon dioxide by ascarite; moisture was removed by means of drierite. Data and Results: A summation was made of operating conditions, yields and conversion in the air …
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Heterogeneous reservoirs in the marine carbon cycle
… between the distinct reservoirs of organic carbon in the ocean and their underlying complexity. First, we show how the heterogeneity of portions of the carbon cycle can be packaged in terms of age structured models and their accompanying age and rate distributions. We further relate the …
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Growth and development of larval bay scallops (Argopecten irradians) in response to early exposure to high CO2
Coastal and estuarine environments experience large variability and rapid shifts in pCO2 levels. Elevated pCO2, or ocean acidification, often negatively affects early life stages of calcifying marine invertebrates, including bivalves, but it is unclear which developmental stage is most sensitive. I …
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Co-gasification of coal and biomass
… or air. The gasification reaction produces CO2 (Carbon-dioxide), H2 (Hydrogen), CO (Carbon-monoxide), CH4 (Methane) and other lower hydrocarbons. The gas produced from a gasifier, known as syngas, can used to produce electricity and liquid fuels. Coal and biomass are used in a gasfier as …
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Using bio-chars as potential catalysts for upgrading wood pyrolysis vapors
… for example, increasing bio-oil moisture content and reducing its calorific value. Therefore, this project aims at understanding decomposition behavior of wood components, its chemical constituent polymers and using moderate catalysts, like bio-chars.;Thermo-chemical decomposition behavior …
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Experimental investigation of biogas production from feedlot cattle manure
… for weight loss over 40 days and the energy content determined. The biogas volume produced was measured as a function of time until there was no measurable gas formation after 41 days. The biogas was analysed for methane and carbon dioxide content using a gas chromatograph. A techno-economic …
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Geophysical and geochemical constraints on submarine volcanic processes
… these popping rocks and demonstrate that mantle carbon concentrations are lower and less heterogeneous than previously proposed. In Chapter 5, I evaluate models for the submarine dispersal of giant pumice clasts using observations from the 2012 Havre Volcano eruption. I show that the seafloor …
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Syn-eruptive degassing of a single submarine lava flow : constraints on MORB CO2 variability, vesiculation, and eruption dynamics
… - 0.16 weight percent), whereas dissolved CO2 contents exhibit a range of concentrations (154 - 278 ppm) and decrease with distance from the EPR axis (i.e., eruptive vent). Ion microprobe analyses of dissolved volatiles within the MORB glasses suggest that the magma erupted supersaturated …
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Scale prevention in sea water evaporators: Part I design and construction
… form on their heat transfer surfaces as calcium carbonate, magnesium hydroxide, and calcium sulfate in 300 to 500 hours of operation. Although the measures directed to overcome the formation of scale in sea water evaporators have been varied, none of these measures have been as successful as …