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R22 ( 디플루오르모노클로로메탄 ) 열분해반응에 의한 테트라플루오르에틸렌의 합성
김상채,김철웅,문상진,소원욱,김수진,이정민 ( Sang Chai Kim,Chul Ung Kim,Sang Jin Moon,Won Wook So,Su Jin Kim,Jung Min Lee ) 한국공업화학회 1995 공업화학 Vol.6 No.6
Tetrafluoroethylene 제조를 위한 R22 열분해반응을 일반적인 상압유통식 반응기에서 반응온도(665∼770℃), 체류시간(0.05∼0.6초) 및 N₂/R22 몰비(3.0∼7.0)를 변수로 수행하였다. 반응온도와 체류시간이 증가함에 따라 R22 전화율은 증가하였으나 TFE 선택도는 감소하였다. 희석제의 사용은 반응성의 향상을 가져왔으며 R22와의 혼합정도는 생성물의 조성에 큰 영향을 미치는 것으로 나타났다. 속도론으로부터 R22 열분해반응의 주반응은 CF₂ 생성반응으로 추정되었고 속도식은 다음과 같은 1차식으로 나타낼 수 있었다. kr= -0.5·f_(R22)·X+(1+0.5·f_(R22))ln 1/(1-X) 이때 속도상수(k)의 활성화에너지는 45.19-49.86㎉/㏖ 범위로 계산되었다. Pyrolysis of R22 for tetrafluoroethylene was carried out using the conventional atmospheric flow reactor. The range of reaction temperature, residence time and N₂/R22 molar ratio were 665∼770℃, 0.05∼0.6 sec, and 3.0∼7.0, respectively. With increasing reaction temperature and residence time, R22 conversion increased, but selectivity of TFE decreased. The use of diluent(N₂) resulted in enhancing the reactivity, and the degree of mixing R22 with N₂ affected the composition of products clearly. The formation of CF₂ might be suggested as the key reaction for pyrolysis of R22 from kinetics experiment. The following first order equation fitted well with experimental results. kr=-0.5·f_(R22)·X+(1+0.5·f_(R22))ln 1/(1-X) The range of activation energy for the rate constant was obtained between 45.19㎉/㏖ and 49.86㎉/㏖.
활성탄에 담지된 Co - Mo 계 촉매에서 티오펜과 유화수소의 승온탈착
임창도,문영환,문상진,김도완,임선기,박승빈 ( Chang Do Ihm,Young Hwan Moon,Sang Jin Moon,Do Woan Kim,Son Ki Ihm,Seung Bin Park ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.4
Temperature-programmed desorption(TPD) was carried out over the sulfided Mo/C, Co/C and Co-Mo/C catalysts, and heats of adsorption of thiophene and hydrogensulfide were obtained from TPD spectra by varying heating rate. It was studied the relationship between these heats of adsorption and the activity for hydrodesulfurization(HDS) of thiophene which was measured in a microflow reactor at atmospheric pressure and 3250. The synergistic HDS activity was well explained by correlating it with the difference in heat of adsorption between thiophene and hydrogensulfide.