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Skoda D, Zhu R, Hanulikova B, Styskalik A, Vykoukal V, Machac P, Simonikova L, Kuritka I, Poleunis C, Debecker DP, Román-Leshkov Y. Propylene Metathesis over Molybdenum Silicate Microspheres with Dispersed Active Sites. ACS Catal 2023; 13:12970-12982. [PMID: 37822857 PMCID: PMC10563125 DOI: 10.1021/acscatal.3c02045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/31/2023] [Indexed: 10/13/2023]
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.
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Affiliation(s)
- David Skoda
- Centre
of Polymer Systems, Tomas Bata University
in Zlin, tr. Tomase Bati 5678, Zlin CZ-76001, Czech Republic
| | - Ran Zhu
- Department
of Chemical Engineering, Massachusetts Institute
of Technology (MIT), 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Barbora Hanulikova
- Centre
of Polymer Systems, Tomas Bata University
in Zlin, tr. Tomase Bati 5678, Zlin CZ-76001, Czech Republic
| | - Ales Styskalik
- Department
of Chemistry, Faculty of Science, Masaryk
University, Kotlarska
2, Brno CZ-61137, Czech Republic
| | - Vit Vykoukal
- Department
of Chemistry, Faculty of Science, Masaryk
University, Kotlarska
2, Brno CZ-61137, Czech Republic
- Central
European Institute of Technology, Masaryk
University, Kamenice
5, Brno CZ 62500, Czech Republic
| | - Petr Machac
- Department
of Chemistry, Faculty of Science, Masaryk
University, Kotlarska
2, Brno CZ-61137, Czech Republic
| | - Lucie Simonikova
- Department
of Chemistry, Faculty of Science, Masaryk
University, Kotlarska
2, Brno CZ-61137, Czech Republic
| | - Ivo Kuritka
- Centre
of Polymer Systems, Tomas Bata University
in Zlin, tr. Tomase Bati 5678, Zlin CZ-76001, Czech Republic
| | - Claude Poleunis
- Institute
of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain (UCLouvain), Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Damien P. Debecker
- Institute
of Condensed Matter and Nanosciences (IMCN), Université catholique de Louvain (UCLouvain), Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Yuriy Román-Leshkov
- Department
of Chemical Engineering, Massachusetts Institute
of Technology (MIT), 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Otroshchenko T, Zhang Q, Kondratenko EV. Room-Temperature Metathesis of Ethylene with 2-Butene to Propene Over MoOx-Based Catalysts: Mixed Oxides as Perspective Support Materials. Catal Letters 2021. [DOI: 10.1007/s10562-021-03822-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AbstractWe investigated the effect of supports based on ZrO2, TiO2, Al2O3, and SiO2 on the rate of propene formation in the metathesis of ethylene with 2-butene at 50 °C over Mo-containing catalysts possessing highly dispersed MoOx. Large improvements in this rate were achieved when using supports composed of mixed oxides (ZrO2–SiO2, ZrO2–PO4, TiO2–SiO2; Al2O3–SiO2) rather than of individual oxides (ZrO2, TiO2, Al2O3, SiO2). Although previous literature studies dealing with the metathesis reaction over Al2O3- or SiO2-suppported catalysts at higher temperatures suggest the importance of redox or acidic properties of supported MoOx species for catalyst activity, we were not able to establish any general direct correlation in this regard. Contrarily, the rate of propene formation can be significantly enhanced when promoting supports with an oxide promoter. We suggest that the created support lattice defects may facilitate the transformation of MoOx to Mo carbenes under reaction conditions or improve the intrinsic activity of the latter.
Graphic Abstract
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Mon M, Leyva-Pérez A. Zeolites catalyze selective reactions of large organic molecules. ADVANCES IN CATALYSIS 2021. [DOI: 10.1016/bs.acat.2021.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
Olefin metathesis is the catalytic transformation of olefinic substrates, finding a wide range of applications in organic synthesis. The mesoporous molecular sieve Santa Barbara Amorphous (SBA-15) has proven to be an excellent support for metathesis catalysts thanks to its regular mesoporous structure, high BET area, and large pore volume. A survey of catalysts consisting of (i) molybdenum and tungsten oxides on SBA-15, and (ii) molybdenum and ruthenium organometallic complexes (Schrock and Grubbs-type carbenes) on SBA-15 is provided together with their characterization and catalytic performance in various metathesis reactions. The comparison with catalysts based on other supports demonstrates the high quality of the mesoporous molecular sieve SBA-15 as an advanced catalyst support.
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