化学処理による斜プチロル沸石系凝灰岩の物理化学的特性の変化 ＩＩ ガスクロマト分離特性に及ぼす酸処理の影響

Abstract

Separations of argon, oxygen, nitrogen, krypton, methane and carbon monoxide have been investigated using acid treated clinoptilolite tuffs as column packings. Argon (methane), oxygen and nitrogen were separated but not completely, on untreated clinoptilolite tuff (SiO2/Al2O3=9.9) and 0.01N-HCl treated clinoptilolite tuff (SiO2/Al2O3=10.2) columns at 30°C of column temperature. Increasing of the acid concentration, retention times of argon and methane came to be longer by the enlargement of pore size of the smaller void in clinoptilolite. Therefore, argon and oxygen tended to elute only with overlap and methane eluted after nitrogen. Argon (oxygen), nitrogen, methane and carbon monoxide were completely separated on the acid treated clinoptilolite tuff of which the ratio of silica to alumina were between 13 and 20 (0.5-3N HCl and 0.5-6N H2SO4 treated specimens). Elution peak of krypton was overlapped with that of nitrogen or methane.