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 9 of 9 for “"organic gases"”.
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The effects of organic gases on atomic spectrometric signals in the ICP
… It was proposed that the addition of an organic gas may reduce the metal oxides, thus increasing the free atom concentration. The addition of propane produced enhancements of AFS signals in the ICP. In this study, the addition of propane and butane depressed many AES signals. In an …
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Capture and recovery of organic gases with electrothermal swing adsorption and post-desorption treatment
… foam packaging manufacturing, use liquefied organic gases (boiling points (Tb) < 20°C) as inert feedstocks. These processes produce low concentration (e.g., 2,000 ppmv) organic gas streams that must be treated to prevent emissions of the organic gases to the atmosphere. The organic gases are …
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Validation of Low Resistance Filters for Gas/Vapour Sampling.
… hygiene assessment of occupational exposures to organic gases and vapours rely on low flow (<200 ml/min) NIOSH sorbent tubes. This work investigates 3M charcoal filter media (JK50 and JK40, 3M, Inc.) for collection and analysis of organic vapours across 0.1 ¿ 5 l/min. To enable this work, a …
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Atmospheric Impact of Biogenic Volatile Organic Compounds: Improving Measurement and Modeling Capabilities
Biogenic volatile organic compounds (BVOCs) are naturally occurring organic compounds emitted by plants, trees, and ecosystems, exerting a profound influence on the Earth's atmosphere, air quality, climate, and ecosystem dynamics. This research project aims to advance our understanding of BVOC …
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Thermally Actuated Resonant Silicon Crystal Nanobalances
… applications related to air-borne particles and organic gases.</p> <p>In addition, due to the internal thermo-electro-mechanical interactions, the active resonators can turn some of the consumed electronic power back into the mechanical structure and compensate for the mechanical losses. …
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Investigating the representation of smoke and its implications for air quality and climate
… expands the model representation of non-methane organic gases (NMOGs) from fires and investigates how important fires are for atmospheric reactivity. This is the first global estimate of the impact of fire on atmospheric reactivity. Chapter 5 focuses on two quantifiable human levers …
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Measurement and characterization of low volatility organic compounds in the atmosphere
Organic aerosol is a central topic in environmental science due to its role in climate forcing and negative health effects. The transformation of organic species from primary gas phase emissions to secondary organic aerosol (SOA) is highly complex and poorly understood, proving difficult for even …
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An operational method for assessing traffic-related air pollution in urban streets
… techniques were used to sample a wide range of inorganic (CO, NO X and Os) and organic gases (benzene, toluene, xylene, ethylbenzene, formaldehyde, acetaldehyde, etc.) at different heights and distances from the kerb. Indicative background measurements were also taken during the same sampling …
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Experimental and numerical evaluation of electrothermal–swing adsorption for capture and recovery or destruction of organic vapors
… of hazardous air pollutants (HAPs) and volatile organic compounds (VOCs) to the atmosphere are serious environmental issues. There were 0.53 billion kg of HAPs and 15 billion kg of VOCs emitted to the atmosphere from anthropogenic sources during 2004 and 2002, respectively. Eighty-nine percent of …