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Full-Text Articles in Engineering Science and Materials
Stabilization Of Vegetable Oil-Based Quenchants To Thermal-Oxidative Degradation: Experimental Strategy And Effect Of Oxidation On Quenching Performance, Éder Cícero Adão Simêncio, Rosa Lúcia Simêncio Otero, Lauralice De Campos Franceschini Canale, George E. Totten
Stabilization Of Vegetable Oil-Based Quenchants To Thermal-Oxidative Degradation: Experimental Strategy And Effect Of Oxidation On Quenching Performance, Éder Cícero Adão Simêncio, Rosa Lúcia Simêncio Otero, Lauralice De Campos Franceschini Canale, George E. Totten
Mechanical and Materials Engineering Faculty Publications and Presentations
Although petroleum oils continue to be the dominant type of basestock for the formulation of vaporizable quenchants, there is increasing pressure to identify an alternative basestock to address the limitations to their continued use because they are not a renewable basestock and they possess generally poor toxicity and biodegradability properties. Currently the most often cited alternative basestocks are those based on seed oils since they are renewable and usually non-toxic but especially because they are typically readily biodegradable. However, they suffer a critically important deficiency in that they are also typically much less stable to thermal-oxidative degradation than petroleum oils. …
Evaluation Of Nitrous Acid Sources And Sinks In Urban Outflow, Elliott T. Gall, Robert J. Griffin, Allison L. Steiner, Jack Dibb, Eric Scheuer, Longwen Gong, Andrew P. Rutter, Basak K. Cevik, Saewung Kim, Barry Lefer, James Flynn
Evaluation Of Nitrous Acid Sources And Sinks In Urban Outflow, Elliott T. Gall, Robert J. Griffin, Allison L. Steiner, Jack Dibb, Eric Scheuer, Longwen Gong, Andrew P. Rutter, Basak K. Cevik, Saewung Kim, Barry Lefer, James Flynn
Mechanical and Materials Engineering Faculty Publications and Presentations
Intensive air quality measurements made from June 22–25, 2011 in the outflow of the Dallas–Fort Worth (DFW) metropolitan area are used to evaluate nitrous acid (HONO) sources and sinks. A two-layer box model was developed to assess the ability of established and recently identified HONO sources and sinks to reproduce observations of HONO mixing ratios. A baseline model scenario includes sources and sinks established in the literature and is compared to scenarios including three recently identified sources: volatile organic compound-mediated conversion of nitric acid to HONO (S1), biotic emission from the ground (S2), and re-emission from a surface nitrite reservoir …