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Valentin Riaby,Heon-Ju Lee,Chi Kyu Choi,Ji Hoon Kim,Vadim Plaksin,Young Sun Mok 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
A novel arc plasma source, which has a very low anode erosion rate (10.10 g/C), a nearly spectrally clean plasma flow, and a lifetime of 103 104 hours, is proposed. The plasma temperature near the nozzle exit is below 100 C at an arc power of 2 kW. The design and the characteristics of the plasmatron are discussed. Experiments with heterogeneous plasma-chemical processes proved the possibility of activating plasma flow in the technologic channel of this plasmatron at a pressure of several mbar. As an example, plasma-chemical etchings of monocrystaline silicon in a CF4 plasma and of a photo-resist on a silicon wafer in O2 and CF4 plasmas were carried out. The etching rates for both processes were evaluated to be about 1 μm/min.
Reduction of NOx in diesel engine emissions by using a plasmatron fuel reformer
Heon-Ju Lee,Vadim Yu. Plaksin,Valentin A. Riaby,Young Sun Mok,Ji Hun Kim,Sang Hoon Lim 한국화학공학회 2008 Korean Journal of Chemical Engineering Vol.25 No.1
An experimental study of diesel exhaust cleaning by means of the plasma chemical pretreatment of fuel is described. Some portion of the fuel was activated in an arc discharge and turned into hydrogen-rich synthesis gas. Plasma chemical reformation of fuel was carried out by using a DC arc plasmatron that was fabricated to increase the ability of gas activation. The yield of diesel fuel reformation reached about 80-100% when small quantities of fuel (flow rate up to ~6 ml/min) were reformed. The synthesis gas, containing H2+CO, was supplied into the engine together with the rest of the fuel-air mixture, and the NOx content in its emissions reduced up to 23%.