イオン交換した斜プチロルフッ石のガス吸着特性 (第2報) : ガスクロマト特性におよぼす斜プチロルフッ石のイオン交換の影響

概要

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Separations of air and C_1-C_4 normal hydrocarbon gases have been investigated using cation exchanged clinoptilolites as column packings. Argon, oxygen and nitrogen were separated but not completely, on the NH_4-clinoptilolite column at room temperature. Oxygen and nitrogen were separated on the K-clinoptilolite column, while argon, oxygen and nitrogen eluted only with overlap on the both Na- and Ca-clinoptilolite columns. The following sequence of elution was observed at 30℃ of column temperature for Na-, K- and Ca-clinoptilolite : methane, ethane, propane, iso-butane, nopmal-butane. On the column containing NH_4-clinoptilolite, the sequence of hydrocarbon gases elution at over 75℃ of column temperature was changed due to the molecular sieve effect by the two kinds of voids with different opening size in clinoptilolite : iso-butane, methane, propane, ethane. It is presumed that iso-butane molecules are absorbed only on the external surface. This result indicates that the apparent diameter of the larger pore is between 4.3Å and 5.0Å in the NH_4-clinoptilolite.
日本粘土学会の論文
1977-05-25