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마숙활,허진영,김강일,홍용철 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
This paper presents a simple structure of MicroHole Discharge (MHD) Jet operated both an atmospheric pressure and underwater. The properties of MHD jet were specified in detail through electrical and optical analysis. Moreover, the differences of characteristics at the conditions of an atmospheric pressure and underwater were compared. For observing the characteristics at the underwater conditions, cylinder type reactor with circulation flow was developed and MHD jets were arranged in the direction of tangent in the reactor. Lastly, bacterial sterilization effects of this device was observed.
마숙활,최대현,천세민,홍용철 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
In the carbon based hydrogen production, water gas shift reaction (WGSR) is the intermediate step used for hydrogen enrichment and CO reduction in synthesis gas. A steam torch contains highly active species, enhancing the chemical reaction rate and eliminating the need for catalysts. We expect to find appropriate position of CO injection is highly helpful to improve hydrogen productivity and to reduce CO rate. Thus, the correlation between the temperatures of the steam plasma and injecting points of carbon monoxide has been investigated in this experiment. Also, we have developed elbow type reactor for controlling CO injecting points by temperature. The characteristics and syngas composition of WGS reaction were described.
Production of hydrogen-rich syngas from methane reforming by steam microwave plasma
최대현,천세민,마숙활,홍용철 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
Steam-methane reforming (SMR) is most commonly carried out in a catalytic reactor at temperaturesfrom 700 to 1000 8C. During the reforming reaction, the catalyst agglomerates under the hightemperatures, showing degradation of catalytic performance with carbon deposition on the catalystsurface. Here, we report methane reforming in a steam plasma generated by microwaves at atmosphericpressure without the use of catalysts. The plasma reforming system is mainly composed of a 2.45 GHzmicrowave plasma torch and a plasma nozzle. Methane gas is introduced into the steam microwaveplasma, which is stabilized by a swirl flow. The steam microwave plasma provides highly active speciesand a high-temperature plasma flame, enhancing the chemical reaction rate and eliminating the need forcatalysts. We investigated the dependence of the hydrogen concentration on the steam to carbon ratio ata given plasma power. Using a specially designed plasma nozzle, we achieved high hydrogenconcentrations (>70 vol.%) in the effluent streams.
Synthesis of Copper Nanoparticles from a Plasma Discharge in Liquid
허진영,김다은,마숙활,김강일,홍용철 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
In recent, the printed electronic is spotlighted among the next generation technologies. Printed electronic used copper nanoparticles (Cu-NPs) that have researched various synthesized methods by chemical vapor deposition, thermal decomposition, micro-emulsion, UV-irradiation, the polyol process and etc. However, previous methods cause secondary environment pollution. Moreover, most of the synthetic methods are not economically feasible due to low throughput and poor scalability. In this sense, we propose solution of the previous problem, Cu-NPs synthesize from copper precursor using a plasma discharge in liquid. The result of analysis, synthesized Cu-NPs size was confirmed to be with the averaged diameter of less than 100 nm. Also, we confirmed Cu-NPs was not oxidized. Eventually, we confirm that the plasm discharge may be a promising tool for the synthesis of Cu-NPs in liquid.