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H_2S의 선택적 산화반응에 미치는 변형된 Zeolite X 촉매의 영향
피준현,이종대,박노국,류시옥,이태진 한국공업화학회 2003 응용화학 Vol.7 No.1
The selective oxidation of hydrogen sulfide was studied over Zeolite X catalysts(Zeolite HX, LiX, NaX, KX) that were prepared by ion exchange method. The acidity sequence of modified Zeolite X catalyst was as follow, Zeolite HX >Zeolite LiX> Zeolite NaX >Zeolite KX.The basicity sequence was reverse of acidity one. For the same conditions (reaction temperature: 225˚c space velocity: 20000h^-1), the conversion of hydrogen sulfide was decreased in Zeolite KX > Zeolite NaX > Zeolite LiX > Zeolite HX order. It was determined that the selective oxidation of hydrogen sulfide was influednced by acidity and basicity. In case of Zeolite NaX catalyst, the yield of element surfer 90% can be obtained at reaction temperature(200), the ratio of O2/H2S (0.5).
이승철,김동현,피준현,류시옥 한국공업화학회 2002 응용화학 Vol.6 No.1
Soot formation of acetylene mixtures diluted with argon was studied behind reflected shock waves by monitoring attenuation of a laser beam in visible(632.8nm) region of the spectrum. Experiments were conducted in the range of 1500~3800K for temperatures, in the range of 0.6~3.3 atm for reflected shock pressures. During the pyrolysis of acetylene, a bell-shaped dependences of soot growth rate, induction time and soot yield were observed. At the same temperature range, an increase in total pressure made induction time short and soot growth rate shifted to lower temperature. Soot growth rate was also proportional to initial concentration of acetylene and they had the maximum value in the temperature range of 2000~2100K.