Effect of Chemical Composition and Method of Preparation on the Physicochemical Properties of the NiO/B2O3–Al2O3 System and Its Catalytic Activity in Ethylene Oligomerization
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Переводная
|
| Журнал |
Catalysis in Industry
ISSN: 2070-0504
, E-ISSN: 2070-0555
|
| Вых. Данные |
Год: 2014,
Том: 6,
Номер: 2,
Страницы: 105-113
Страниц
: 9
DOI:
10.1134/S2070050414020044
|
| Ключевые слова |
boratecontaining alumina, oligomerization, ethylene, nickel oxide |
| Авторы |
Karpova T. R.
1
,
Lavrenov A. V.
1
,
Buluchevskii E. A.
1
,
Gulyaeva T. I.
1
,
Buyal’skaya K. S.
1
,
Shilova A. V.
1
,
Leontieva N. N.
1
,
Arbuzov A. B.
1
,
Drozdov V. A.
1
|
| Организации |
| 1 |
Institute of Hydrocarbon Processing, Siberian BranchRussian Academy of SciencesOmskRussia
|
|
The effect the chemical composition of a support, the content of nickel, and the method of its bind
ing has on the physicochemical and catalytic properties of the NiO/B2O3–Al2O3 system is studied. The boron
oxide content in the support is varied from 2 to 30 wt %, while the nickel concentration is 0.59−3.18 wt %. The
catalyst samples are studied via Xray diffraction analysis, temperatureprogrammed desorption of ammonia,
IR spectroscopy (including that of adsorbed CO), and UVVIS diffuse reflectance spectroscopy. Tests of the
catalysts in ethylene oligomerization are conducted in a fixedbed flow reactor at a temperature of 200°C, a
pressure of 1 MPa, and a space velocity of ethylene of 0.5 h–1. The feedstock is an ethylene−methane gas mixture containing 30 wt % of ethylene. It is suggested that the activity of the NiO/B2O3–Al2O3 system in ethylene oligomerization can be attributed to the formation of octahedral Ni2+ cations environed by borate anions on the surface of the system. The most active catalysts contain 2−3 wt % Ni and 10–20 wt % B2O3 in the supports. The method of preparation (adsorption binding or impregnation) has little effect on the state of nickel in the NiO/B2O3–Al2O3 system samples and their catalytic properties. The prepared catalysts are characterized by the ease of preparation, availability, and a low cost of the initial materials, as compared to known catalysts.