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- Title
Selective Ring Opening of Ethylbenzene on Bifunctional Catalyst Pt–Ir over Hierarchical USY Zeolite.
- Authors
Elena Pérez-Guevara; Molinillo, Jose M. G.; Martínez de la Ossa, Enrique J.; Frontela, Juana; Lázaro, Jesús; Franco, María José
- Abstract
A bifunctional catalyst for selective ring opening (SRO) has been designed using a hierarchical zeolite as support. This material was prepared introducing additional mesoporosity in the microporous structure of a USY zeolite, by surfactant-templating post-synthetic mesostructuring process. Monometallic and bimetallic Pt(x)−Ir(y) catalysts with different metal loadings and Pt/Ir mole ratio have been prepared. In addition, to optimise the acid-metal balance, the acidity of the support has been modulated via ion-exchange process with Na+. The catalytic behaviour of the prepared materials has been evaluated with ethylbenzene hydrogenation and SRO simultaneous reaction in a continuous-flow fixed-bed reactor, at 275°C and 3 MPa. Pt(2)−Ir(1) resulted the most promising metallic combination. The high hydrogenolytic activity of Ir, along with the high hydrogenation activity and cracking limitation of Pt attained a high paraffins production. This behaviour was improved modulating the acidity of the support. Thus, Pt(2)−Ir(1)/Na−FAU−CTAB catalyst maximized the yield to paraffins which improve the cetane number of fuels.
- Subjects
CETANE number; ETHYLBENZENE; CONTINUOUS flow reactors; CATALYSTS; METAL catalysts; ZEOLITES; BORON trifluoride
- Publication
Petroleum Chemistry, 2020, Vol 60, Issue 1, p104
- ISSN
0965-5441
- Publication type
Article
- DOI
10.1134/S0965544120010119