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in subjects: "Adsorption Heat"  
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Calculation of Reactive-evaporation Rates of Chromia

Description: A methodology is developed to calculate Cr-evaporation rates from Cr2O3 with a flat planar geometry. Variables include temperature, total pressure, gas velocity, and gas composition. The methodology was applied to solid-oxide, fuel cell conditions for metallic interconnects and to advanced-steam turbines conditions. The high velocities and pressures of the advanced steam turbine led to evaporation predictions as high as 5.18 9 10-8 kg/m2/s of CrO2(OH)2(g) at 760 °C and 34.5 MPa. This is equival… more
Date: April 1, 2008
Creator: Holcomb, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Materials and Component Development for Advanced Turbine Systems

Description: In order to meet the 2010-2020 DOE Fossil Energy goals for Advanced Power Systems, future oxy-fuel and hydrogen-fired turbines will need to be operated at higher temperatures for extended periods of time, in environments that contain substantially higher moisture concentrations in comparison to current commercial natural gas-fired turbines. Development of modified or advanced material systems, combined with aerothermal concepts are currently being addressed in order to achieve successful operat… more
Date: October 1, 2008
Creator: Alvin, M. A.; Pettit, F.; Meier, G.; Yanar, N.; Chyu, M.; Mazzotta, D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Noble Metal Catalysts for Mercury Oxidation in Utility Flue Gas: Gold, Palladium and Platinum Formulations

Description: The use of noble metals as catalysts for mercury oxidation in flue gas remains an area of active study. To date, field studies have focused on gold and palladium catalysts installed at pilot scale. In this article, we introduce bench-scale experimental results for gold, palladium and platinum catalysts tested in realistic simulated flue gas. Our initial results reveal some intriguing characteristics of catalytic mercury oxidation and provide insight for future research into this potentially imp… more
Date: July 1, 2008
Creator: Presto, A. A. & Granite, E. J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effects of Temperature Gradients and Heat Fluxes on High-Temperature Oxidation

Description: The effects of a temperature gradient and heat flux on point defect diffusion in protective oxide scales were examined. Irreversible thermodynamics were used to expand Fick’s first law of diffusion to include a heat-flux term—a Soret effect. Oxidation kinetics were developed for the oxidation of cobalt and of nickel doped with chromium. Research is described to verify the effects of a heat flux by oxidizing pure cobalt in a temperature gradient at 900 °C, and comparing the kinetics to isotherma… more
Date: April 1, 2008
Creator: Holcomb, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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