Effect of Pt and Gd on Coke Formation and Regeneration During JP-8 Cracking Over ZSM-5 Catalysts

Document Type


Subject Area(s)

Engineering, Chemical Engineering, Catalysis and Reaction Engineering


Pt and Gd loaded ZSM-5 catalysts were synthesized by ion exchange method to investigate the effect of metal promoters on catalyst activity, coking and regeneration during military aviation fuel (JP-8) cracking into petroleum gas (PG) at 723 K. Multiple cracking and regeneration cycles were performed over the ZSM-5 based catalysts and their crystalline structure, oxidation profile, coke band and acidity were characterized. It was revealed that addition of Gd metal to the ZSM-5 catalyst prevented formation of complex aromatic coke and increased the number of Lewis acid sites, while Pt promoted ZSM-5 catalyst showed a decrease in the coke oxidation temperature. The effect of Pt and Gd promoters enhanced the coke burn-off ability, formed hydrogen rich carbon species and reduced oxidation temperature of coke substantially. Furthermore, agglomeration of Pt particles was partially impeded by coexisting Gd metal on the regenerated ZSM-5 catalyst. Synergetic effects of Pt and Gd promoters stabilized the PG yield and product distribution over the Pt–Gd/ZSM-5 catalyst during the cracking and regeneration cycles.


© Applied Catalysis B, 2015, Elsevier

Kim, S., Sasmaz, E., Lauterbach, A.J. (2015). Effect of Pt and Gd on coke formation and regeneration during JP-8 cracking over ZSM-5 catalysts. Applied Catalysis B, 168-169, 212-219.