Acid Sites in Thermal Transformations of Ca-Rich Clinoptilolite
Тезисы доклада
| Общее |
Язык:
Английский,
Жанр:
Тезисы доклада (Meeting Abstracts),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Конференция |
13th International Zeolite Conference
08-13 июн. 2001
,
Montpellier
|
| Сборник |
Zeolites and Mesoporous Materials at the dawn of the 21st century :
Proceedings of the 13th International Zeolite Conference, 8-13 June 2001, Montpellier, France
Сборник,
2001.
443 c. ISBN 9780444502384.
|
| Журнал |
Studies in Surface Science and Catalysis
ISSN: 0167-2991
|
| Вых. Данные |
Год: 2001,
Том: 135,
Номер статьи
: 11-P-26,
Страниц
: 8
DOI:
10.1016/S0167-2991(01)81431-2
|
| Авторы |
Valueva G.P.
1
,
Afanassiev I.S.
2
,
Paukshtis E.A.
3
,
Seryotkin Y.V.
1
,
Moroz N.K.
2
,
Budneva A.A.
3
|
| Организации |
| 1 |
Institute of Mineralogy and Petrography, Acad. Koptyug ave. 3, 630090, Novosibirsk, Russia
|
| 2 |
Institute of Inorganic Chemistry, Lavrentyev ave, 3, 630090, Novosibirsk, Russia
|
| 3 |
Institute of Catalysis, Lavrentyev ave, 5, 630090, Novosibirsk, Russia
|
|
The residual thermally induced structural changes in calcium-rich clinoptilolite, which might sustain its structure, were studied using the x-ray fluorescent method. A Ca-rich clinoptilolite from basalt was used. The sample was subjected to five cycles of heating to 450° and cooling. After thermal treatment the sample of Ca-rich clinoptilolite from basalt suffered some structural changes, enhancing its thermal persistence. They were manifested in lowering of structural symmetry caused by distortion of the framework with retained positions of cations and H2O mols. within the cavities, along with the bridging OH groups formation. OH groups in different positions exerted different impact on the thermal persistence of the sample, and their evolution during the cycles led to the increase of the stability.