Journal of Catalysis 360 (2018) 135–144 Contents lists available at ScienceDirect Journal of Catalysis journal homepage: www.elsevier.com/locate/jcat Metathesis of ethylene and 2-butene over MoO /Al O -SiO : Effect of x 2 3 2 MoO structure on formation of active sites and propene selectivity Vita A. Kondratenko , Tobias Hahn, Ursula Bentrup, David Linke, Evgenii V. Kondratenko Leibniz-Institut für Katalyse e.V. an der Universität Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany article i nfo abstract Article history: Catalyst characteristics affecting product selectivity and mechanistic aspects of formation of Mo-carbene Received 23 November 2017 species in the metathesis of ethylene and trans-2-butene to propylene over MoO /AlSiO were elucidated x x Revised 25 January 2018 by complementary techniques. Steady-state catalytic tests revealed that reaction pathways leading to Accepted 1 February 2018 propene formation depend on the kind (highly dispersed or polymerized) of MoO species, from which Available online 22 February 2018 Mo-carbene species are formed in situ. C H is produced directly through metathesis of C H and 3 6 2 4 trans-2-C H on Mo-carbenes originated from polymerized MoO species, whereas the metathesis of 1- 4 8 x Keywords: and 2-butenes plays an important role for propene formation on
Journal of Catalysis – Elsevier
Published: Apr 1, 2018
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