SEARCH · Search NASA
Results for “OXIDES”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Modulated CH4 oxidation over PGM/Spinel oxide dual layer catalysts: Experiments and modeling
Not Available
Interaction of magnesia-carbon refractory with ferrous oxide under flash ironmaking conditions
Not provided.
Spark plasma sintered porous aluminum oxide for filtration applications
Not provided.
Natural sunlight-driven oxidation of Mn2+(aq) and heterogeneous formation of Mn oxides on hematite
Not Available
Ti Substitution Facilitating Oxygen Oxidation in Na2/3Mg1/3Ti1/6Mn1/2O2 Cathode
Not provided.
Observation of a potential-dependent switch of water-oxidation mechanism on Co-oxide-based catalysts
Not Available
Atomic-level mechanism of CO2-promoted oxidation of alumina-forming alloys
Not provided.
Mono-disperse PdO nanoparticles prepared via microwave-assisted thermo-hydrolyzation with unexpectedly high activity for formic acid oxidation
Explore the source record for details and available documents.
Achieving stable anionic redox chemistry in Li-excess O2-type layered oxide cathode via chemical ion
Explore the source record for details and available documents.
Adsorption of Perfluorooctane sulfonate (PFOS) onto metal oxides modified biochar
Not Available
Effects of hydrogen isotope type on oxidation rates for trace releases
Not Available
Assessment of sulfur trioxide formation due to enhanced interaction of nitrogen oxides and sulfur oxides in pressurized oxy-combustion
Pressurized oxy-combustion is emerging to be one of the best technologies for significantly decreasing the energy penalty for CO 2 capture in coal-fired power plants. However, the higher pressure boosts the formation of acid gases, including SO 3 and NO 2 , which could increase the risk of corrosion. The synergistic promotion of SO 3 and NO 2 formation in pressurized oxy-combustion is kinetically evaluated under representative conditions (1 ~ 30 atm, 600 ~ 1200 °C, NO/SO 2 = 0.1 ~ 5). We begin with a comprehensive mechanism (72 species and 428 reactions), covering nitrogen and sulfur chemistry, relying on GRI-Mech 3.0. This analysis shows that the interaction of SO X and NO X enhances the conversion rates of SO 2 → SO 3 , and this effect is more apparent at elevated pressures and lower temperatures. Mechanism analyses indicate that at elevated pressures, the formation pathways of SO 3 through HOSO 2 + O 2 = SO 3 + HO 2 , and NO 2 through HO 2 + NO = NO 2 + OH, are promoted due to the strong interaction between SO X and NO X . The intermediate between these two reactions is SO 2 + OH + M = HOSO 2 + M, resulting in a strong cycle, that can be expressed by the global reaction NO + SO 2 + O 2 = NO 2 + SO 3 . Finally, a nine-step reduced chemistry is developed and validated to accurately predict the formation of SO 3 in the post-flame region at elevated pressures.