Deactivation of a Pt/Silica–Alumina Catalyst and Effecton Selectivity in the Hydrocracking of n-Hexadecane
2013 (English)In: Topics in catalysis, ISSN 1022-5528, E-ISSN 1572-9028, Vol. 56, no 9-10, 594-601 p.Article in journal (Refereed) Published
The deactivation behavior of a bifunctionalcatalyst consisting of platinum on amorphous silica–aluminawas studied in the hydrocracking of n-hexadecane.The initial decline in activity and the change in selectivitywere monitored at the following reaction conditions:pressure = 30 bar; temperature = 310 C; hydrogen-tohexadecanefeed molar ratio = 10. Initially, hexadecaneconversion and selectivity to cracking products decreasedrapidly with time-on-stream, and stabilized after 40 h onstream. This could be related to an initial loss of metalsurface area, which decreased the activity of monofunctionalhydrogenolysis generating cracking products. Theacidic function seemed to be unaffected under these reactionconditions. The stable catalyst was exposed to a lowerhydrogen-to-hexadecane ratio to accelerate deactivation bycoking. A decline in the activity of both functions wasobserved. The activity of the acidic function could bealmost completely recovered by oxidative regeneration,while the metal activity was only partially recovered.
Place, publisher, year, edition, pages
2013. Vol. 56, no 9-10, 594-601 p.
Hydrocracking, Platinum, Amorphous silica-alumina, Hexadecane, Bifunctional catalyst, Deactivation
Other Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-129964DOI: 10.1007/s11244-013-0011-8ISI: 000320500200011ScopusID: 2-s2.0-84879858815OAI: oai:DiVA.org:kth-129964DiVA: diva2:653920
QC 201310072013-10-072013-10-072016-03-08Bibliographically approved