caa a22 4500 606173919 CHVBK 20210128100735.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11244-015-0394-9 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0394-9 Al-MFI Nanosheets as Highly Active and Stable Catalysts for the Conversion of Propanal to Hydrocarbons [Elektronische Daten] [Helen Luo, Teerawit Prasomsri, Yuriy Román-Leshkov] The conversion of propanal to hydrocarbons is investigated over mesoporous aluminosilicate MFI nanosheets (Al-MFI-ns) of single-unit-cell thickness and conventional aluminum MFI zeolite (Al-MFI) at 673K and atmospheric pressure. Al-MFI-ns exhibits a fivefold increase in stability attributed to the shorter diffusion path lengths and open architecture of the nanosheets, which minimizes pore blocking from fouling. The overall ratio of olefin to aromatic products is similar for Al-MFI-ns and Al-MFI at all conversion levels. However, the product distribution within each group shows that the Al-MFI-ns generate a fivefold increase in selectivity to C6-8 olefins and a twofold increase in selectivity to C9-10 aromatics compared to Al-MFI. The very high selectivity to C9- aromatic trimethylbenzene supports an aromatization mechanism involving sequential aldol condensation and dehydration sequences. The very short diffusion paths in the single-unit-cell thick nanosheets allows for the C9 aromatics to diffuse out of the pores before they can be converted to lighter aromatics or olefins. Al-MFI-ns shows no indication of irreversible deactivation, fully recovering its original activity after regeneration by calcination, and retaining similar deactivation rates and product selectivities as the fresh catalyst. Al-FMI-ns improves the production of aromatics from light oxygenates at mild conditions, a key feature for bio-oil upgrading. Springer Science+Business Media New York, 2015 Bio-oil upgrading nationallicence Propanal to hydrocarbons nationallicence Hierarchical zeolites nationallicence Aromatization nationallicence Nanosheets nationallicence Luo Helen Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut Prasomsri Teerawit Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut Román-Leshkov Yuriy Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/7-9(2015-05-01), 529-536 1022-5528 58:7-9<529 2015 58 11244 https://doi.org/10.1007/s11244-015-0394-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0394-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Luo Helen Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut NATIONALLICENCE 700 1- Prasomsri Teerawit Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut NATIONALLICENCE 700 1- Román-Leshkov Yuriy Department of Chemical Engineering, Massachusetts Institute of Technology, 02139, Cambridge, MA, USA aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/7-9(2015-05-01), 529-536 1022-5528 58:7-9<529 2015 58 11244