caa a22 4500 463170237 CHVBK 20180406164811.0 cr unu---uuuuu 170326e20070801xx s 000 0 eng 10.1007/s10450-007-9071-z doi (NATIONALLICENCE)springer-10.1007/s10450-007-9071-z High resolution adsorption isotherms of N2 and Ar for nonporous silicas and MFI zeolites [Elektronische Daten] [Kazuyuki Nakai, Joji Sonoda, Masayuki Yoshida, Masako Hakuman, Hiromitsu Naono] The high resolution adsorption isotherms of N2 (77.4K) and Ar (87.3K) have been measured for two nonporous silicas with different silanol contents (3.3 and 0.35OH/nm2) and for two MFI zeolite with different Al contents (Si/Al=12.5 and 500). Silanol groups and Al sites (acid sites) gives the significant effect on the N2 isotherms at submonolayer, but the Ar isotherms are independent of silanols and Al sites. The Ar isotherms, therefore, are preferable in calculation of microporosity of zeolites. The N2 and Ar isotherms for MFI zeolite (Si/Al=500) have been measured at temperatures of 77-94K, from which the differential adsorption energies of N2 and Ar are calculated. The interaction of N2 with channel surface of MFI zeolite is greater than that of Ar in the range of α s =0.1-0.7. The hystereses are detected for the N2 isotherm in p/p o=0.1-0.3 at 77.4K and for the Ar isotherm in p/p o=3×10−4-2×10−3 at 87.3K. However, it is difficult to explain the hysteresis phenomenon using differential adsorption energy. Springer Science+Business Media, LLC, 2007 MFI zeolite nationallicence ZSM-5 nationallicence Silicalite nationallicence Adsorption isotherms of N2 and Ar nationallicence Differential adsorption energy nationallicence Nakai Kazuyuki BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut Sonoda Joji BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut Yoshida Masayuki BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut Hakuman Masako BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut Naono Hiromitsu BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 351-356 0929-5607 13:3-4<351 2007 13 10450 https://doi.org/10.1007/s10450-007-9071-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10450-007-9071-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nakai Kazuyuki BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut NATIONALLICENCE 700 1- Sonoda Joji BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut NATIONALLICENCE 700 1- Yoshida Masayuki BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut NATIONALLICENCE 700 1- Hakuman Masako BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut NATIONALLICENCE 700 1- Naono Hiromitsu BEL-Japan, INC, Haradanaka, Toyonaka-shi, 561-0807, Osaka, Japan aut NATIONALLICENCE 773 0- Adsorption Springer US; http://www.springer-ny.com 13/3-4(2007-08-01), 351-356 0929-5607 13:3-4<351 2007 13 10450 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer