Adsorption and Textural Properties of LSX Zeolite at the Initial Stages of Destruction
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Translated
|
| Journal |
Protection of Metals and Physical Chemistry of Surfaces
ISSN: 2070-2051
, E-ISSN: 2070-206X
|
| Output data |
Year: 2017,
Volume: 53,
Number: 6,
Pages: 989-994
Pages count
: 6
DOI:
10.1134/S2070205117060168
|
| Tags |
CO2 and CH4 adsorption, LSX zeolite, mechanism of mesopores’ formation, NaCl ion exchange, NH4Cl ion exchange |
| Authors |
Leonova A. A.
1
,
Ayupov A. B.
1
,
Fenelonov V. B.
1,2
,
Mel’gunov M. S.
1,2
|
| Affiliations |
| 1 |
Boreskov Institute of Catalysis, Novosibirsk, 630090 Russia
|
| 2 |
Novosibirsk State University, Novosibirsk, 630090 Russia
|
|
Funding (1)
|
1
|
Federal Agency for Scientific Organizations
|
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.