NDLI: Al-MFI Nanosheets as Highly Active and Stable Catalysts for the Conversion of Propanal to Hydrocarbons

Content Provider	Springer Nature Link
Author	Luo, Helen Prasomsri, Teerawit Román Leshkov, Yuriy
Copyright Year	2015
Abstract	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 673 K 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 C$_{6–8}$ olefins and a twofold increase in selectivity to C$_{9–10}$ aromatics compared to Al-MFI. The very high selectivity to C$_{9–}$ 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 C$_{9}$ 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.
Starting Page	529
Ending Page	536
Page Count	8
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	58
Issue Number	7-9
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2015-03-31
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bio-oil upgrading Propanal to hydrocarbons Hierarchical zeolites Aromatization Nanosheets Catalysis Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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