A5101746841- Combustion and flame dynamics
- Advanced Combustion Engine Technologies
- Catalytic Processes in Materials Science
- Chemical Synthesis and Characterization
- Microstructure and Mechanical Properties of Steels
- Supercapacitor Materials and Fabrication
- Catalysis and Oxidation Reactions
- Advancements in Battery Materials
- Catalysts for Methane Reforming
- Metal Alloys Wear and Properties
- Ammonia Synthesis and Nitrogen Reduction
- Heat transfer and supercritical fluids
- Vehicle emissions and performance
- ZnO doping and properties
- Semiconductor materials and devices
- Metallurgy and Material Forming
- Crystallography and molecular interactions
- Hydrogen Storage and Materials
- Nuclear materials and radiation effects
- Advanced Battery Materials and Technologies
- Water Quality Monitoring Technologies
- MXene and MAX Phase Materials
- Mechanical stress and fatigue analysis
- Marine Bivalve and Aquaculture Studies
- Rocket and propulsion systems research
Ulsan National Institute of Science and Technology
2023-2024
Korea University
2011-2015
Korea Atomic Energy Research Institute
2010
Potassium oxide (K2O) is used as a promotor in industrial ammonia synthesis, although metallic potassium (K) better theory. The reason K2O because K, which volatilizes around 400 °C, separates from the catalyst harsh synthesis conditions of Haber-Bosch process. To maximize efficiency using K with low temperature reaction below °C prerequisite. Here, we synthesize and Fe via mechanochemical process near ambient (45 1 bar). final concentration reaches high 94.5 vol%, was extraordinarily higher...
Highly pressurized direct injection applied to automotive vehicles was developed for better power and fuel efficiency, but it causes impingement, which generates more soot emissions. In the present study, analyses of combustion characteristics impingement were conducted with a direct-injection spark ignition engine using split-injection strategies. Full three-dimensional unsteady Eulerian–Lagrangian two-phase numerical simulations carried out predict flow field as functions duration ratio...
Dimethyl ether (DME) continues to be considered as an alternative fuel conventional hydrocarbon fuels. Specifically, DME has been a substitute for liquefied petroleum gas (LPG) because the physical and chemical characteristics of are similar those LPG. However, combustion performance not yet established. In this study, NOx-emission LPG, DME, LPG/DME-blended were experimentally investigated in counterflow nonpremixed flame. The flame structure, temperature, NOx concentration, distribution OH...
Combustion and NO emission characteristics of a fuel blend comprising liquefied petroleum gas (LPG) dimethyl ether (DME) were investigated using counterflow diffusion flames. Visible light photos, Schlieren OH planar laser-induced fluorescence (PLIF) images, maximum emissions examined. The temperature, fuel-consumption rate, species mole fraction, species-production index (EINO) examined by numerical simulation. experimental results showed that DME has wider reaction zone, higher peak...
Efficient sodium ion storage in graphite is as yet unattainable, because of the thermodynamic instability intercalates-graphite compounds. In this work, fluorozirconate (Na
Sodium-Ion Storage Dark yellow spheres represent zirconium atoms on the surfaces of Zr oxide reactor and balls. It is an anthropomorphic representation for in-situ conversion sodium fluorosilicate (SFS) into fluorozirconate (SFZ) to form SFZ functionalized graphite (SFZ-G). When silicon (purple spheres) are replaced with atoms, resulting SFZ-G becomes electrochemically active enough illustrate this discovery. More in article number 2404283, Gao-Feng Han, Jong-Beom Baek, co-workers.
In case of the low carbon chromium steel that have widely been used for carburized gears or rolling bearings, austenite grain coarsening may be occasionally occurred during carburizing. To restrain this phenomenon, most hot forged parts given to an isothermal heat treatment normalizing immediately after forging and/or prior Therefore, their production cost includes unexpected additional expenses caused by such a non-value added process. confirm possibility energy saving, as well attaining...
Numerical studies were conducted to investigate the internal flow field and combustion characteristics of DISI engine with methanol blended in gasoline. Dual injection was applied compared single strategy. The amount fuel corresponded air-fuel ratio each for complete combustion. preforming model this study, software STAR-CD employed both modeling solving. operating speed condition at 4000 rpm/WOT (Wide open throttle) where fully warmed. results M28 showed that uniformity, equivalence ratio,...
Abstract not Available.