1. Hydrogen Isotope (H2 and D2) Sorption Study of CHA-Type Zeolites
- Author
-
Takahiko Sugiyama, Yu Tachibana, Kenji Kotoh, Takumi Nakamori, Masahiro Tanaka, Tatsuya Suzuki, Yuki Yoneyama, and Akira Taguchi
- Subjects
Nuclear and High Energy Physics ,Chabazite ,Zeolite ,Chemistry ,Mechanical Engineering ,Hydrogen isotope ,Inorganic chemistry ,Sorption ,hydrogen isotope separation ,Nuclear Energy and Engineering ,General Materials Science ,Porous medium ,porous materials ,Civil and Structural Engineering - Abstract
Using either single H2 and D2 or H2-D2 mixed gases, the sorption abilities of CHA (chabazite)-type zeolites ion-exchanged with K, Na, or Ca were studied at 77, 201, and 250 K. The LTA (Linde Type A) (3A) and FAU (faujasite)-type zeolites were also examined for comparison. The pore diameters in these materials were found to decrease on the order of FAU > Ca-CHA > [K-CHA, Na-CHA, and LTA(3A)]. The quantities of D2 adsorbed on these zeolites were larger than the amounts of H2. At higher temperatures, the CHA-type zeolites having smaller pores exhibited superior D2/H2 selectivity compared with the LTA(3A) and FAU, suggesting that hydrogen isotope separation using zeolites is affected by pore size.
- Published
- 2020