Adsorption and Textural Properties of LSX Zeolite at the Initial Stages of Destruction
Научная публикация
| Общая информация |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Protection of Metals and Physical Chemistry of Surfaces
ISSN: 2070-2051
, E-ISSN: 2070-206X
|
| Вых. Данные |
Год: 2017,
Том: 53,
Номер: 6,
Страницы: 989-994
Страниц
: 6
DOI:
10.1134/S2070205117060168
|
| Ключевые слова |
CO2 and CH4 adsorption, LSX zeolite, mechanism of mesopores’ formation, NaCl ion exchange, NH4Cl ion exchange |
| Авторы |
Leonova A.A.
1
,
Ayupov A.B.
1
,
Fenelonov V.B.
1,2
,
Mel’gunov M.S.
1,2
|
| Организации |
| 1 |
Boreskov Institute of Catalysis, Novosibirsk, 630090 Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, 630090 Russia
|
|
Информация о финансировании (1)
|
1
|
Федеральное агентство научных организаций России
|
V.44.1.16.
|
Alteration of adsorption properties and porous structure (texture) of the KNaLSX zeolite at the initial stages of its destruction during ion-exchange modification in solutions of NH4Cl and thermal shock under vacuum degassing has been studied. Transmission electron microscopy, X-ray diffraction, low-temperature nitrogen adsorption and adsorption of CO2 and CH4 at 273 K were applied for characterization of the obtained materials. Conversion of the predominantly microporous material to the material with threemode pore-size distribution is shown. Significant fraction of the faujasite phase and corresponding micropores are preserved in the material. This is accompanied with formation of pores of two types: quasi-spherical mesopores with the characteristic size of 5 nm and the meso-macropores with typical size exceeding 40 nm. Basing on the obtained results, a mechanism of textural changes in the LSX zeolite treated under applied conditions is proposed.