イオン交換した斜プチロルフッ石のガス吸着特性 (第1報)

概要

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The adsorption of N_2, CO_2, CH_4, C_2H_6 and C_3H_8 in cation exchanged clinoptilolite was examined. Clinoptilolite tuff from Futatsui, Akita Pref., was used as a starting material, from which Na-, K-, Ca- and NH_4-clinoptilolite were prepared by cation exchange treatment. Na-clinoptilolite adsorbs considerable amount of small molecules such as N_2 and CO_2 slowly, whereas it is able to adsorb a small amount of large molecules such as CH_4, C_2H_5 and C_3H_8rapidly. This result indicates that Na-clinoptilalite has two kinds of voids with different opening size. The apparent diameter of small aperture seems to be less than 3.7Å and that of large one more than 4.3Å. It is estimated that specific surface area of the smaller void accounts for nearly 2/3 of the whole surface area. K-clinoptilolite adsorbs a large amount of CH_4 and C_2H_6 very slowly, and NH_4-clinoptilolite is able to adsorb them rapidly. These results indicate that the apparent diameter of the small pore is enlarged from 3.7Å to 3.8Å depending on cation exchange. ^+studies on Utilization of Zeolite Tuff (V)
日本粘土学会の論文
1975-06-25