Propylene Metathesis over Molybdenum Silicate Microspheres with Dispersed Active Sites
Name
propylene-metathesis-over-molybdenum-silicate-microspheres-with-dispersed-active-sites.pdf
Description
Published version
Size
5.33 MB
Format
Adobe PDF
Checksum (MD5)
1702dc199ffb870657a9cb0b00cb8f71
Author(s)
Skoda, David
Zhu, Ran
Hanulikova, Barbora
Styskalik, Ales
Vykoukal, Vit
Machac, Petr
Simonikova, Lucie
Kuritka, Ivo
Poleunis, Claude
Debecker, Damien P
Date Issued
September 20, 2023
Journal
ACS Catalysis
Publisher
American Chemical Society
Citation
David Skoda, Ran Zhu, Barbora Hanulikova, Ales Styskalik, Vit Vykoukal, Petr Machac, Lucie Simonikova, Ivo Kuritka, Claude Poleunis, Damien P. Debecker, and Yuriy Román-Leshkov. ACS Catalysis 2023 13 (19), 12970-12982.
Version
Final published version
Abstract
In this work, we demonstrate that amorphous and porous molybdenum silicate microspheres are highly active catalysts for heterogeneous propylene metathesis. Homogeneous molybdenum silicate microspheres and aluminum-doped molybdenum silicate microspheres were synthesized via a nonaqueous condensation of a hybrid molybdenum biphenyldicarboxylate-based precursor solution with (3-aminopropyl)triethoxysilane. The as-prepared hybrid metallosilicate products were calcined at 500 °C to obtain amorphous and porous molybdenum silicate and aluminum-doped molybdenum silicate microspheres with highly dispersed molybdate species inserted into the silicate matrix. These catalysts contain mainly highly dispersed MoOx species, which possess high catalytic activity in heterogeneous propylene metathesis to ethylene and butene. Compared to conventional silica-supported MoOx catalysts prepared via incipient wetness impregnation (MoIWI), the microspheres with low Mo content (1.5–3.6 wt %) exhibited nearly 2 orders of magnitude higher steady-state propylene metathesis rates at 200 °C, approaching site time yields of 0.11 s–1.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
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DOI of Published Version
https://doi.org/10.1021/acscatal.3c02045
