Nature and Centers of Localization of Extraframework Particles in Y Zeolite Dealuminated by Silicon Tetrachloride
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Russian Chemical Bulletin
ISSN: 1066-5285
, E-ISSN: 1573-9171
|
| Вых. Данные |
Год: 1989,
Том: 38,
Номер: 8,
Страницы: 1582-1587
Страниц
: 6
DOI:
10.1007/BF00956934
|
| Авторы |
Vereshhagina T.A.
1,2
,
Kirik S.D.
1,2
,
Dubkova S.A.
1,2
,
Boronin A.I.
1,2
,
Anshits A.G.
1,2
|
| Организации |
| 1 |
Institute of Chemistry and Chemical Technology, Siberian Branch, Academy of Sciences of the USSR, Krasnoyarsk
|
| 2 |
Institute of Catalysis, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk
|
|
X-ray diffraction, XPS, and NMR have been used to investigate the nature and centers of localization of nonframework particles in Y zeolite dealuminated by silicon tetrachloride. It has been established that the reaction products formed upon dealumination consist mainly of aluminum compounds that migrate from the volume of the zeolite to the surface and are also partially localized in internal supercages and small cages (sodalite cells). Water washing removes the particles localized in the supercages but does not affect the particles localized in sodalite cells. It has been shown that, by plotting maps of electron density on the basis of x-ray powder diffraction patterns, the sites of localization of extraframework particles can be determined. The results are consistent with those obtained by other methods, and the maps of electron density give a graphic picture of changes in internal structure of the Y zeolite.