Biomass-mediated ZSM-5 zeolite synthesis: when self-assembly allows to cross the Si / Al lower limit

Marcelo Maciel Pereira (1) , Elisa Gomes (1) , Alessandra Vieira Silva (1) , Ana Belen Pinar (2) , Marc-Georg Willinger (3) , Sangaraju Shanmugam (4) , Céline Chizallet (5) , Guillaume Laugel (6) , Pit Losch (7) , Benoit Louis (7)

1 UFRJ - Universidade Federal do Rio de Janeiro [Brasil] = Federal University of Rio de Janeiro [Brazil] = Université fédérale de Rio de Janeiro [Brésil]
2 PSI - Paul Scherrer Institute
3 FHI - Fritz-Haber-Institut der Max-Planck-Gesellschaft
4 Daegu Gyeongbuk Institute of Science and Technology
5 IFPEN - IFP Energies nouvelles
6 LRS - Laboratoire de Réactivité de Surface
7 LMSPC - Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse

A family of Al-rich ZSM-5 zeolites with Si / Al = 8 ± 0.5 was prepared according to a biomass-mediated supramolecular approach. A combination of advanced characterisation techniques and periodic density functional theory (DFT) calculations unraveled the purity and stability of unexpected Al-enriched ZSM-5 structures, hence allowing to cross the frontier of Si / Al lower limit. In addition, these Al-rich ZSM-5 zeolites demonstrated high catalytic activity in n-hexane cracking and methanol conversion into hydrocarbons, being in line with the presence of numerous BrØnsted acid sites.

Domaines: Chimie

Marcelo Maciel Pereira, Elisa Gomes, Alessandra Vieira Silva, Ana Belen Pinar, Marc-Georg Willinger, et al.. Biomass-mediated ZSM-5 zeolite synthesis: when self-assembly allows to cross the Si / Al lower limit. Chemical Science, 2018, 9 (31), pp.6532 - 6539. ⟨10.1039/C8SC01675E⟩. ⟨hal-01882119v1⟩