Physicochemical and Catalytic Properties of SAPO-31 Materials Prepared from the Silica Sources Characterized by a Different Degree of Polymerization
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: 2017,
Том: 66,
Номер: 2,
Страницы: 231-240
Страниц
: 10
DOI:
10.1007/s11172-017-1723-x
|
| Ключевые слова |
fumed silica, isomerization, mechanism of silicon incorporation, microporous silicoaluminophosphates, n-decane, tetraethoxysilane |
| Авторы |
Smirnova M.Yu.
1,2
,
Davydova M.G.
1
,
Titkov A.I.
3
,
Ayupov A.B.
1
,
Kikhtyanin O.V.
4
|
| Организации |
| 1 |
G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences,
5 prosp. Akad. Lavrentieva, 630090 Novosibirsk, Russian Federation.
|
| 2 |
Novosibirsk State University, 2 ul. Pirogova, 630090 Novosibirsk, Russian Federation.
|
| 3 |
Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences,
18 ul. Kutateladze, 630128 Novosibirsk, Russian Federation
|
| 4 |
Research Institute of Inorganic Chemistry, RENTECHUniCRE, Areal Chempark, Zaluzi, 436 70 Litvinov, Czech Republic.
|
|
Two series of microporous silicoaluminophosphates SAPO-31 with different Si content (Si/Al = 0—0.5) were synthesized using silica sources characterized by various degree of polymerization (fumed silica and tetraethoxysilane). Physicochemical properties of the resulted materials were studied by X-ray diffraction, XPS, scanning (SEM) and transmission (TEM) electron microscopy. The nature of the silicon species was identified by 29Si NMR method and the acidity was measured by IR-spectroscopy of adsorbed pyridine. The activity and selectivity of Pd modified SAPO-31 samples from both series were evaluated in the isomerization of n-decane. It was found that the use of the monomer as a silicon source ensured more efficient silicon incorporation, which resulted in the higher activity of Pd/SAPO-31 catalysts. Moreover, the selectivity of these samples for isomerization was found to be independent of the silicon content and its distribution.