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Showing 1 to 14 of 14 for “"oxygen enriched"”.
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Quantitative measurements of temperature using laser-induced thermal grating spectroscopy in reacting and non-reacting flows
… excitation of OH in the burned gas region of in oxygen enriched CH4/O2/N2 and CH4/air laminar flames was performed at elevated pressure (0.5 MPa) for a range of conditions. Measurements were acquired in oxygen enriched flames to provide an environment in which to demonstrate LITGS thermometry …
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Flameholding methods for compact hypersonic systems
… the hypermixer geometries alone. Non-premixed oxygen enrichment was tested as an alternative in an axisymmetric Mach 3.5 flowpath. It was observed that oxygen enrichment had significant capability to promote stable scram-mode combustion with low losses in total pressure from sources other than …
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ARRAYS OF MILLIMETER-SCALE RUBBER COMBUSTION ENGINES
… modality. With my colleagues, we find that oxygen-enriched mixtures of hydrocarbons, when ignited in molded rubber chambers, quickly inflate thin elastomeric “pistons” outward, producing kHz-frequency actuations with >1 W stroke power outputs. We confirm repeatable oxy-fuel combustion using …
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Syngas production using a catalytic engine
… in-cylinder without a catalyst, with air or oxygen-enriched air (partial oxidation). This experiment explores the use and effects of a catalyst deposited on metallic foams placed in a one-cylinder compression-ignition engine, operating either in partial oxidation mode in combination with dry …
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A Comparison of Several Parameters of Aging in Drosophila Melanogaster Under Normal and High Oxygen Tension
… throughout their adult life under high oxygen tension, might provide a model for accelerated aging, at least in regard to lipid peroxidation damage. To test this proposal, adult male Oregon R Drosophila melanogaster were exposed to an atmosphere of 1:1 oxygen-nitrogen. A number of …
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Low Temperature Oxidation of Heavy Crude Oil: Experimental Study and Reaction Modeling
… enhanced oil recovery. In this technique, air or oxygen-enriched air is injected into the formation. A portion of the oil combusts in situ and provides heat, water, and product gases. Within the oil formation, three major combustion regions can be recognized: Low Temperature Oxidation (LTO), …
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Design and Development of a Portable Multi-user Medical Grade Oxygen Concentrator
… pandemic has increased the demand for high-flow oxygen concentrators, particularly in resource-limited areas. There is a pressing need for an innovative, high-flow, multi-user oxygen concentrator using local materials to address this healthcare challenge. Methods: The study focused on creating a …
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Experimental investigations of oxygen-separating ion transport membranes for clean fuel synthesis
… the potential for 100% selective separation of oxygen from air. ITMs operate at extreme temperatures (>800°C), necessary for the mobility of lattice oxygen ions: this can result in significant experimental challenges. Specifically, the local gas compositions at both the high oxygen (air) and low …
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Production of novel amine oxidases from microorganisms
… combined effects of induction biomass levels and oxygen availability, through the use of air and oxygen enriched air, in the culture led to significant increase of the enzyme activity and gave important insights about the sensitivity of this enzyme under highly oxidative conditions. Undoubtedly, …
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A study of configurational alternatives of a gas-to-liquids process based on Fischer-Tropsch technology
… a major contributor to costs the effect of using oxygen-enriched or pure air is investigated. Since production of heavy wax is prioritized, FTS represents the use of cobalt catalyst in LTFT operation. Where air is used, FTS is run to high conversion in once through mode to avoid the unfavorable …
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Microbubble fermentation of recombinant Pichia pastoris for human serum albumin production
… human serum albumin (HSA) production is a high oxygen demand process. The oxygen demand is usually met by increased agitation rate and use of oxygen-enriched air. Microbubble fermentation however can supply adequate oxygen to the microorganisms at relatively low agitation rates because of …
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Experimental investigation of constant volume sulfur dust explosions
… concentrations of 280 and 560 g=m 3 . The oxygen concentration varied between 10% and 42% by volume. The ame temperature increased with oxygen concentration from approximately 900 K for the 10% oxygen cases to temperatures exceeding 2000 K under oxygen enriched conditions. The temperature …
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Adaptive lung growth following exposure to simulated high altitude
Altered oxygen balance in the body at high altitude and in some physiological and pathological conditions may induce adaptive changes in the body which may be organ specific. Because gas exchange is the primary function of the lungs, they may undergo structural changes to adapt to the imbalance of …
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Oxygen-Enhanced Combustion: Theory and Applications
In the broadest sense, oxygen-enhanced combustion: OEC) refers to the use of oxygen to improve combustion and/or process characteristics. When a stream of oxygen is available, a wide range of flame configurations is possible. This work considers two specific configurations of OEC and is divided …