• 作者： Lee, Min-Lie; Chiang, Anthony S.T.
• 中文摘要： 本研究測量對二甲苯、間二甲苯、乙基苯、甲苯、異丙苯等之雙成份溶液在高矽沸石上之吸附超量, 並以多成份之蘭氏衡溫式擬合之。所求出之對/間二甲苯選擇性較KY沸石高出許多。此外, 甲苯與異丙苯之選擇性介於對, 間二甲苯之間, 故可以用作層析分離之脫附劑。乙基苯與對二甲苯之選擇性相差頗大, 但甲苯與異丙苯並不合適作此二成份分離時之脫附劑。
• 英文摘要： The excess adsorption isotherm of para and meta-xylene, as well as ethylbenzene on silicalite, were measured at 25.degree.C. Mixture Langmuir isotherm was used to fit the excess isotherms. The langmuir constants and separation factors obtained in this study may be used to simulate the chromatographic separation of para and meta xylenes in the future. Compared to KY zeolite, the adsorption capacity of silicalite is smaller, but the para to meta selectivity is higher. A chromatographic xylene separation process based on silicalite would therefore be at least as effective as the one based on KY zeolite. The excess isotherms also indicated that the adsorptivity of toluene and cumene were in between that of p- and m-xylene. Therefore, toluene and cumene could be used as desorbent in the chromatographic separation of para and meta-xylene. There was a noticeable difference between the affinity of para-xylene and ethylbenzene on silicalite. However, neither cumene or toluene is the suitable desorbent for the separation of ethylbenzene and p-xylene.
• 中文關鍵字： 吸附; 氧化矽沸石; 二甲苯; 色層分析分離; 脫附劑
• 英文關鍵字： Adsorption; Silicalite; Xylenes; Chromatographic Separation; Desorbent