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최우진 ( Woo Jin Choi ),황재영 ( Jae Young Hwang ),안성환 ( Sung Hwan Ahn ),김명수 ( Myung Soo Kim ),박홍수 ( Hong Soo Park ),함현식 ( Hyun Sik Hahm ) 한국유화학회 2005 한국응용과학기술학회지 Vol.22 No.1
N/A Methanol was synthesized by homogeneous and catalytic reactions of partial oxidation of methane. The effect of pressure, temperature and oxygen concentration on methanol synthesis was investigated. The catalyst used was Bi-Cs-Mg-Cu-Mo mixed oxide. The partial oxidation reaction was carried out in a fixed bed reactor at 20~46 bar and 450~480℃ and oxygen concentration of 5.3~7.7 ㏖%. The results were compared with results of homogeneous reaction performed at the same conditions. Methane conversions of the homogeneous and catalytic reactions increased with temperature. Methanol selectivity of the homogeneous reaction decreased with increasing temperature. However, the methanol selectivity of catalytic reaction increased with temperature. For both homogeneous and catalytic reactions, the methane conversions were around 5 %. This may be due to the low oxygen concentration. Methanol selectivity of the catalytic reaction was higher than that of homogeneous one.
최우진 ( Woo Jin Choi ),안성환 ( Sung Hwan Ahn ),장영준 ( Young Jun Jang ),김규성 ( Kyu Sung Kim ),김명수 ( Myung Soo Kim ),박홍수 ( Hong Soo Park ),함현식 ( Hyun Sik Hahm ) 한국유화학회 2004 한국응용과학기술학회지 Vol.21 No.4
N/A Reaction conditions and catalysts were investigated for direct CF₃I synthesis. Optimum reaction temperature was determined by pyrolysis of CF₃H and catalytic reactions. Reactions with changing oxygen concentration were performed. As a result, yield of CF₃I increased with decreasing oxygen concentration. Catalytic activity was changed with the weight ratio of the used metal salts. This result was stemmed from the change in the pore size of activated carbon by the metal salts. The optimum reaction conditions were: 600℃, space velocity of 45 hr^(-1), and with 7wt% KF/AC catalyst.