Performance Enhancement by Unsteady-State Reactor Operation: Theoretical Analysis for Two-Sites Kinetic Model
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Chemical Engineering and Technology
ISSN: 0930-7516
, E-ISSN: 1521-4125
|
| Вых. Данные |
Год: 2003,
Том: 26,
Номер: 7,
Страницы: 751-758
Страниц
: 8
DOI:
10.1002/ceat.200301640
|
| Авторы |
Reshetnikov S.I.
1
,
Ivanov E.A.
1
,
Kiwi-Minsker L.
2
,
Renken A.
2
|
| Организации |
| 1 |
Boreskov Institute of Catalysis SB RAS, Pr. Akad. Lavrentieva 5, Novosibirsk 630090, Russia
|
| 2 |
Laboratory of Chemical Reaction Engineering, Swiss Federal Institute of Technology (EPFL), Lausanne CH-1015, Switzerland
|
|
Информация о финансировании (3)
|
1
|
Российский фонд фундаментальных исследований
|
01-03-32790
|
|
2
|
European Commission
|
INCO-COPERNICUS IC15-CT97-0709
|
|
3
|
Swiss National Science Foundation
|
|
Theoretical analysis of the reactor performance under unsteady-state conditions was carried out. The reactions are described by two kinetic models, which involve the participation in catalytic reaction of two types of active sites. The kinetic model I assumes the blocking of one of the active sites by a reactant, and the kinetic model II suggests a transformation of active sites of one type into another under the influence of the reaction temperature. The unsteady-state conditions on the catalyst surface are supposed to be created (i) by forced oscillations of temperature and concentration in the reactor inlet (periodic operation of reactor) and (ii) by catalyst circulation between two reactors in a dual-reactor system (spatial regulation). The influence of various parameters like concentration of reactant, cycle split, length of period of forced oscillations, temperatures and the ratio of catalyst volumes in the dual-reactor was investigated with respect to the yield of the desired product. It is shown that for both cases of unsteady-state conditions (periodic reactor operation as well as in a dual-reactor system), a mean reaction rate predicted by the kinetic model I was up to two times higher than the steady-state value. The kinetic model II shows a 20 % increase of the selectivity towards the desired product.