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

Etienne Mazoyer, Kaï Chung Szeto, Nicolas Merle, Sébastien Norsic, Olivier Boyron, Jean-Marie Basset, Mostafa Taoufik, Christopher P. Nicholas

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)1-7
Number of pages7
JournalJournal of Catalysis
Volume301
DOIs
StatePublished - May 2013

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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