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    Study of ethylene/2-butene cross-metathesis over W-H/Al2O 3 for propylene production: Effect of the temperature and reactant ratios on the productivity and deactivation

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    Type
    Article
    Authors
    Mazoyer, Etienne
    Szeto, Kaï Chung
    Merle, Nicolas cc
    Norsic, Sébastien
    Boyron, Olivier
    Basset, Jean-Marie cc
    Taoufik, Mostafa
    Nicholas, Christopher P. cc
    KAUST Department
    Chemical Science Program
    KAUST Catalysis Center (KCC)
    Physical Science and Engineering (PSE) Division
    Date
    2013-05
    Permanent link to this record
    http://hdl.handle.net/10754/562744
    
    Metadata
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    Abstract
    A highly active and selective catalyst based on supported tungsten hydride for the cross-metathesis between ethylene and 2-butenes yielding propylene has been investigated at low pressure with various temperatures and feed ratios. At low temperature (120 °C), the catalyst deactivates notably with time on stream. This phenomenon was extensively examined by DRIFTS, TGA, DSC, and solid-state NMR techniques. It was found that a large amount of carbonaceous species were formed due to a side-reaction such as olefin polymerization which took place simultaneously with the metathesis reaction. However, at 150 °C, the catalyst was stable with time and thereby gave a high productivity in propylene. Importantly, the slight increase in temperature clearly disfavored the side reaction. The ratio of ethylene to trans-2-butene was also studied, and surprisingly, the W-H/Al2O3 catalyst is stable and highly selective to propylene even at substoichiometric ethylene ratios. © 2013 Elsevier Inc. All rights reserved.
    Citation
    Mazoyer, E., Szeto, K. C., Merle, N., Norsic, S., Boyron, O., Basset, J.-M., … Nicholas, C. P. (2013). Study of ethylene/2-butene cross-metathesis over W-H/Al2O3 for propylene production: Effect of the temperature and reactant ratios on the productivity and deactivation. Journal of Catalysis, 301, 1–7. doi:10.1016/j.jcat.2013.01.016
    Publisher
    Elsevier BV
    Journal
    Journal of Catalysis
    DOI
    10.1016/j.jcat.2013.01.016
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.jcat.2013.01.016
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; KAUST Catalysis Center (KCC)

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