| Titre : | Catalytic cracking and coking of supercritical n - dodecane in microchannel coated with HZSM - 5 zeolites (2010) |
| Auteurs : | Fanxu Meng, Auteur ; Guozhu Liu, Auteur ; Shudong Qu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 19, Octobre 2010) |
| Article en page(s) : | pp. 8977–8983 |
| Note générale : | Chimie industrielle |
| Langues : | Anglais |
| Tags : | Hydrocarbon fuels Thermal catalytic cracking Microchannel |
| Résumé : | To improve the cracking rate of supercritical hydrocarbon fuels, HZSM-5 coating was prepared over the inner surface of microchannels reactors by the washcoating method. Thermal or catalytic cracking of n-dodecane, a model compound of hydrocarbon fuels, was experimentally investigated in the stainless steel microchannel coated with HZSM-5 coatings under supercritical conditions (p > 4 MPa, T > 450 °C). It is found that cracking of n-dodecane was enhanced more than 100% by HZSM-5 coatings in 30 min reaction durations at 525 and 550 °C despite gradual deactivations of catalytic activities due to conversion coke from pyrolysis and acid-catalyzed reaction. Cokes deposited on the microchannels with and without HZSM-5 coating were characterized by scanning electron microscopy (SEM) and temperature-programmed oxidation (TPO), indicating that HZSM-5 coating effectively reduces formation of filamentous cokes and its damage on the micro channel surface by shielding surface metals when the temperature is higher than 600 °C. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie101158w |
