A5021355771- Catalytic Processes in Materials Science
- Plasma Applications and Diagnostics
- Rocket and propulsion systems research
- Energetic Materials and Combustion
- Plasma Diagnostics and Applications
- Heat transfer and supercritical fluids
- Spacecraft and Cryogenic Technologies
- Aerospace Engineering and Control Systems
- Advanced Wireless Communication Techniques
- Combustion and flame dynamics
- Industrial Gas Emission Control
- Advanced Adaptive Filtering Techniques
- Wireless Communication Networks Research
- Catalysts for Methane Reforming
- Advanced Combustion Engine Technologies
- Thermochemical Biomass Conversion Processes
- Electrohydrodynamics and Fluid Dynamics
- Hydrogen Storage and Materials
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- Metal and Thin Film Mechanics
- Advanced Chemical Physics Studies
- Combustion and Detonation Processes
- Magnetic Field Sensors Techniques
- Advanced Nanomaterials in Catalysis
Korea Institute of Machinery and Materials
2012-2022
Korea University of Science and Technology
2018-2021
Daejeon University
2019
Government of the Republic of Korea
2019
Korea Advanced Institute of Science and Technology
1999-2012
Samsung (South Korea)
2001-2002
The arc control, optimization of the reaction condition, and a full understanding pathway are viable means for energy-efficient direct conversion methane to acetylene.
Among the three types of instabilities, low-frequency instability (chugging instability) was experimentally investigated with respect to chamber pressure and aspect ratio (L=D) catalytic reactors in a monopropellant thruster. ThreeH2O2 thrusterswere used, two parameters were found be dominant factors that generated chugging order several tens hertz. Ahigh lowL=D values (lowpressure drop across catalyst bed) preferable for reducing oscillation inside reaction chamber. In addition, it these...
The conversion of methane is measured in a planar-type dielectric barrier discharge reactor using three different noble gases—He, Ne, and Ar—as additives. empirical results obtained clearly indicate that activation considerably affected by thy type gas used. Through 0-D calculations, the parameters inside reactor, i.e., electron temperature density, are estimated experiment results. A comparison characteristics experimental shows an important factor achieving high mixture with Ar highest...
A1200N vacuum-thrust-class staged-bipropellant engine that uses decomposed hydrogen peroxide as an oxidizer and kerosene a fuel was developed tested with the aim of investigating axial injector integrated distributor. This geometry, where is injected into turbulent flow peroxide, to evaluate influence designed on performance respect equivalence ratio, pattern injection orifices, characteristic length L . For characteristics such autoignition stable combustion, firing tests over awide range...
The conversion of methane is measured in a planar-type dielectric barrier discharge reactor using γ-Al2O3 (sphere), α-Al2O3 and (16–20 mesh). Investigations on the surface properties shape three packing materials clearly indicate that activation considerably affected by material used. Capacitances inside gap are estimated from charge–voltage plots, comparison generated transferred charges for different conditions show difference between γ- α-phase Al2O3 affects characteristics. Moreover, all...
An energy efficient dry reforming process using a rotating arc plasma is introduced. By virtue of an elongated stable state in arc, thermal efficiency up to 76% and reduction the costs 9.4 5.52 kJ L −1 for reactant conversion syngas production, respectively, are realized. The effects CH 4 /CO 2 molar ratio on cost were also investigated. lowest obtained at ratios 3/7 1 respectively. Moreover, we found that specific input (SEI) 11.2kJ could maximize both CO almost 100%. results presented...
Abstract The mechanism of accelerated reduction oxidized metal catalysts by plasma was herein explored. Hydrogen radicals produced discharge are important for generating energetic hydroxyl an Eley–Rideal‐type reaction, and these in turn undergo desorption without further reaction. desorbed react with hydrogen to produce gas‐phase water. results obtained discuss the advantages employing catalysis surface reactions.
Methane has interested many researchers as a possible new energy source, but the high stability of methane causes bottleneck in activation, limiting its practical utilization. To determine how to effectively activate using non-thermal plasma, conversion is measured planar-type dielectric barrier discharge reactor three different noble gases—Ar, Kr, and Xe—as additives. In addition results at various applied voltages, characteristics such electron temperature density were calculated through...
Adverse effects of phosphate ions used as a stabilizing agent in rocket-grade hydrogen peroxide on the decomposition catalyst were investigated. For comparative study, and selected to decompose 90 wt% containing ions. The reactivity catalysts measured by tests decreased half peroxide, including Endurance was evaluated 50 N monopropellant thruster measuring chamber pressure. degradation efficiency evident after initial 5 s, during which lead-doped revealed better performance than pure...
A simple adaptive least mean square (LMS) type algorithm for channel estimation is developed based on certain modifications to finite-impulse response (FIR) Wiener filtering. The proposed nearly blind since it does not require any training sequence or statistics, and can be implemented using only noise variance knowledge. condition guaranteeing the convergence of theoretical error (MSE) values are also derived. Computer simulation results demonstrate that yield a smaller MSE than existing...