Ye, G;
Wang, H;
Duan, X;
Sui, Z;
Zhou, X;
Coppens, M;
Yuan, W;
(2019)
Pore network modeling of catalyst deactivation by coking, from single site to particle, during propane dehydrogenation.
AIChE Journal
, 65
(1)
pp. 140-150.
10.1002/aic.16410.
Preview |
Text
Ye_et_al-2019-AIChE_Journal.pdf - Published Version Download (8MB) | Preview |
Abstract
A versatile pore network model is used to study deactivation by coking in a single catalyst particle. This approach allows to gain detailed insights into the progression of deactivation from active site, to pore, and to particle – providing valuable information for catalyst design. The model is applied to investigate deactivation by coking during propane dehydrogenation in a Pt‐Sn/Al2O3 catalyst particle. We find that the deactivation process can be separated into two stages when there exist severe diffusion limitation and pore blockage, and the toxicity of coke formed in the later stage is much stronger than of coke formed in the early stage. The reaction temperature and composition change the coking rate and apparent reaction rate, informed by the kinetics, but, remarkably, they do not change the capacity for a catalyst particle to accommodate coke. On the other hand, the pore network structure significantly affects the capacity to contain coke.
| Type: | Article |
|---|---|
| Title: | Pore network modeling of catalyst deactivation by coking, from single site to particle, during propane dehydrogenation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/aic.16410 |
| Publisher version: | http://dx.doi.org/10.1002/aic.16410 |
| Language: | English |
| Additional information: | © 2018 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/ |
| Keywords: | propane dehydrogenation, deactivation by coking, pore network model, pore blockage, catalyst design |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10057426 |
Archive Staff Only
 |
View Item |
