@article{oai:air.repo.nii.ac.jp:00001305,
 author = {進藤, 隆世志 and 猿田, 直子 and 中田, 竜 and ほか and SHINDO, Takayoshi and SARUTA, Naoko and NAKATA, Ryu},
 issue = {1/2},
 journal = {素材物性学雑誌},
 month = {Dec},
 note = {Adsorption isotherms of nitrogen and methane were measured on natural clinoptilolite and
montmorillonite/mordenite zeolites as adsorbents, IR spectra of methane adsorbed by the natural
zeolites were also measured. Analyses of isotherms of nitrogen showed that small surface area
(SEET ; 20~26m2g-1) and pore volume (Vp ; O.060~O.062mlg-l) as well as small micro porosity (internal
surface area, SINT; 3~4m2g-" micro pore volume, Vmiceo ; O.008~O.0l1mlg-l), while those of larger
values (SEET; 112m'g', Vp ; O.24mlg" SINT ; 17m'g-" Vmice, ; O.048mlg ') for montmorillonite/mordenite
zeolite. Adsorption data of methane on clinoptilolite zeolites and on montmorillonite/mordenite
zeolite were not found to obey a Langmuir-type adsorption equation even in the range of lower
pressures (p <200mmHg). Isosteric heats of adsorption (q,t) of methane on montmorillonite/
mordenite zeolite were larger than those on clinoptilolite zeolites. The values of q,t decreased with
an increase in the amount of methane adsorbed, indicating that surfaces of the natural zeolites are
not homogeneous and adsorption of methane is likely to proceed on stronger adsorption sites. IR
spectra of the J) l.CH" for the natural zeolites-methane system suggested that methane molecules are
adsorbed on strong cationic sites which corresponds to Na~ and K+ sites for clinoptilolite zeolites
and to Ca2+ and Na+ sites for montmorillonite/mordenite zeolite.},
 pages = {6--12},
 title = {窒素およびメタンをプローブとする天然ゼオライトの吸着特性},
 volume = {14},
 year = {2001}
}