Seong-Cheon Kim

Decomposition Characterist of Toluene Using a Glidarc Water-jet Plasma

Volatile organic compounds emitted to the atmosphere can cause adverse effects on human health and participate in photochemical smog formation reactions. The destruction of a series of VOCs has been carried out by non-thermal plasma in other researches. And the characteristic of non-thermal plasma was operated at atmospheric pressure and low temperature. A new type non-thermal plasma reactor was investigated combined Glidarc plasma with water jet in this research. Also, it was found that the water-jet had an significant effect on the toluene removal efficiency. But too much water content does not favor toluene decomposition by decreasing of reaction temperature. The input toluene concentration, gas flow rate, water flow rate and specific energy input were used as experiment variables. The toluene removal efficiency, energy efficiency and specific energy input were 75.3%, 146.6 g/kWh and at a water flow rate of 100 mL/min.

Study on the Separation of CO 2 from Flue Gas Using Polysulfone Hollow Fiber Membrane

In this research, polysulfone hollow fiber membrane was used to recover CO2 which is one of greenhouse gases from flue gas stream being emitted after the combustion of fossil fuels. The prerequisite requirement is to design the membrane process producing high-purity CO2 from flue gas. For separation of CO2, a membrane module and flue gas containing 10% carbon dioxide was used. The effects of operating conditions such as pressure, temperature, feed gas composition and multi-stage membrane on separation performance were examined at various stage cuts. Higher operating pressure and temperature increased carbon dioxide concentration and recovery ratio in permeate. Recovery ratio and separation efficiency increased if a higher content of CO2 injection gas composition. Three-stage membrane system was producing a 95% CO2 with 90% recovery from flue gas. The separation efficiency of three-stage membrane system was higher than one-stage system.