Regeneration of the Oxidation Catalysts Based on the Aqueous Solutions of Non-Keggin Mo-V-P Heteropoly Acids by Molecular Oxygen
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
International Journal of Chemical Kinetics
ISSN: 0538-8066
, E-ISSN: 1097-4601
|
| Вых. Данные |
Год: 2014,
Том: 46,
Номер: 9,
Страницы: 567-576
Страниц
: 10
DOI:
10.1002/kin.20858
|
| Авторы |
Zhizhina Elena G.
1
,
Odyakov Viktor F.
1
|
| Организации |
| 1 |
Институт катализа им. Г.К. Борескова СО РАН
|
|
Kinetic peculiarities of regeneration of the aqueous solutions of non-Keggin-type Mo-V-P heteropoly acids HaPzMoyVx′Ob (HPA-x′) and their acidic salts by O2 are studied. The HPA-x′ solutions have heightened thermal stability that permits to consider them as highly efficient catalysts for different oxidation processes. In the HPA-x′ and their salts solutions, these peculiarities prove to be similar. The studied reaction is of the first order with respect to O2 and V(IV), if [V(IV)] is higher than 0.8 M. As [V(IV)] decreases during the reaction, its order with respect to V(IV) increases to the third. The apparent activation energy of the reaction at temperatures 150–170°С is 37.5 kJ mol−1. The obtained kinetic equation was used to calculate a new effective air reactor for the regeneration of the homogeneous HPA-x′ catalyst in a pilot process of methylethylketone synthesis.