Fixation of krypton in type-A zeolites and its leakage characteristics

Michihiro Miyake, Toru Konishi, Takashi Suzuki, Shozo Osada, Hironao Kojima

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Kr was loaded forcibly into ion-exchanged type-A zeolites (Na+-, K+-, Rb+- and Ca2+-A) by applying both high temperature (300°-500°C) and pressure (51-101 MPa) and the leakage behaviour of the fixed Kr has been investigated. The sufficient amount of Kr was successfully encapsulated into the α-cages of Na+-, K+-, and Rb+-A, although they were hydrated to some extent. The temperatures of maximum rate of Kr leakage increased with increase in the ionic radii of exchanged alkali cations, while the amount of Kr fixed in zeolites decreased. The coexistent hydrated water in the Kr-loaded type-A zeolites was found not to influence the leakage of Kr from them. It was concluded that the fixation of Kr into the α-cages of hydrated type-A zeolites is possible when the effective diameter of the 8-membered oxygen rings is reduced to narrower size by the exchangeable cations with larger ionic radii than Rb+ and the encapsulated zeolites are stored in water-free atmosphere.

Original languageEnglish
Pages (from-to)291-294
Number of pages4
JournalZeolites
Volume4
Issue number3
DOIs
Publication statusPublished - 1984
Externally publishedYes

Fingerprint

krypton
leakage
fixation
cation
water
oxygen
ion
atmosphere
temperature

Keywords

  • Zeolite A

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

Miyake, M., Konishi, T., Suzuki, T., Osada, S., & Kojima, H. (1984). Fixation of krypton in type-A zeolites and its leakage characteristics. Zeolites, 4(3), 291-294. https://doi.org/10.1016/0144-2449(84)90041-1

Fixation of krypton in type-A zeolites and its leakage characteristics. / Miyake, Michihiro; Konishi, Toru; Suzuki, Takashi; Osada, Shozo; Kojima, Hironao.

In: Zeolites, Vol. 4, No. 3, 1984, p. 291-294.

Research output: Contribution to journalArticle

Miyake, M, Konishi, T, Suzuki, T, Osada, S & Kojima, H 1984, 'Fixation of krypton in type-A zeolites and its leakage characteristics', Zeolites, vol. 4, no. 3, pp. 291-294. https://doi.org/10.1016/0144-2449(84)90041-1
Miyake, Michihiro ; Konishi, Toru ; Suzuki, Takashi ; Osada, Shozo ; Kojima, Hironao. / Fixation of krypton in type-A zeolites and its leakage characteristics. In: Zeolites. 1984 ; Vol. 4, No. 3. pp. 291-294.
@article{3c804428e41746188cf089384226dc1b,
title = "Fixation of krypton in type-A zeolites and its leakage characteristics",
abstract = "Kr was loaded forcibly into ion-exchanged type-A zeolites (Na+-, K+-, Rb+- and Ca2+-A) by applying both high temperature (300°-500°C) and pressure (51-101 MPa) and the leakage behaviour of the fixed Kr has been investigated. The sufficient amount of Kr was successfully encapsulated into the α-cages of Na+-, K+-, and Rb+-A, although they were hydrated to some extent. The temperatures of maximum rate of Kr leakage increased with increase in the ionic radii of exchanged alkali cations, while the amount of Kr fixed in zeolites decreased. The coexistent hydrated water in the Kr-loaded type-A zeolites was found not to influence the leakage of Kr from them. It was concluded that the fixation of Kr into the α-cages of hydrated type-A zeolites is possible when the effective diameter of the 8-membered oxygen rings is reduced to narrower size by the exchangeable cations with larger ionic radii than Rb+ and the encapsulated zeolites are stored in water-free atmosphere.",
keywords = "Zeolite A",
author = "Michihiro Miyake and Toru Konishi and Takashi Suzuki and Shozo Osada and Hironao Kojima",
year = "1984",
doi = "10.1016/0144-2449(84)90041-1",
language = "English",
volume = "4",
pages = "291--294",
journal = "Zeolites",
issn = "0144-2449",
publisher = "Elsevier BV",
number = "3",

}

TY - JOUR

T1 - Fixation of krypton in type-A zeolites and its leakage characteristics

AU - Miyake, Michihiro

AU - Konishi, Toru

AU - Suzuki, Takashi

AU - Osada, Shozo

AU - Kojima, Hironao

PY - 1984

Y1 - 1984

N2 - Kr was loaded forcibly into ion-exchanged type-A zeolites (Na+-, K+-, Rb+- and Ca2+-A) by applying both high temperature (300°-500°C) and pressure (51-101 MPa) and the leakage behaviour of the fixed Kr has been investigated. The sufficient amount of Kr was successfully encapsulated into the α-cages of Na+-, K+-, and Rb+-A, although they were hydrated to some extent. The temperatures of maximum rate of Kr leakage increased with increase in the ionic radii of exchanged alkali cations, while the amount of Kr fixed in zeolites decreased. The coexistent hydrated water in the Kr-loaded type-A zeolites was found not to influence the leakage of Kr from them. It was concluded that the fixation of Kr into the α-cages of hydrated type-A zeolites is possible when the effective diameter of the 8-membered oxygen rings is reduced to narrower size by the exchangeable cations with larger ionic radii than Rb+ and the encapsulated zeolites are stored in water-free atmosphere.

AB - Kr was loaded forcibly into ion-exchanged type-A zeolites (Na+-, K+-, Rb+- and Ca2+-A) by applying both high temperature (300°-500°C) and pressure (51-101 MPa) and the leakage behaviour of the fixed Kr has been investigated. The sufficient amount of Kr was successfully encapsulated into the α-cages of Na+-, K+-, and Rb+-A, although they were hydrated to some extent. The temperatures of maximum rate of Kr leakage increased with increase in the ionic radii of exchanged alkali cations, while the amount of Kr fixed in zeolites decreased. The coexistent hydrated water in the Kr-loaded type-A zeolites was found not to influence the leakage of Kr from them. It was concluded that the fixation of Kr into the α-cages of hydrated type-A zeolites is possible when the effective diameter of the 8-membered oxygen rings is reduced to narrower size by the exchangeable cations with larger ionic radii than Rb+ and the encapsulated zeolites are stored in water-free atmosphere.

KW - Zeolite A

UR - http://www.scopus.com/inward/record.url?scp=48549114982&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=48549114982&partnerID=8YFLogxK

U2 - 10.1016/0144-2449(84)90041-1

DO - 10.1016/0144-2449(84)90041-1

M3 - Article

AN - SCOPUS:48549114982

VL - 4

SP - 291

EP - 294

JO - Zeolites

JF - Zeolites

SN - 0144-2449

IS - 3

ER -