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
Type
ArticleAuthors
Mazoyer, EtienneSzeto, Kaï Chung
Merle, Nicolas

Norsic, Sébastien
Boyron, Olivier
Basset, Jean-Marie

Taoufik, Mostafa
Nicholas, Christopher P.

KAUST Department
Chemical Science ProgramKAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Date
2013-05Permanent link to this record
http://hdl.handle.net/10754/562744
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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.2013.01.016Publisher
Elsevier BVJournal
Journal of Catalysisae974a485f413a2113503eed53cd6c53
10.1016/j.jcat.2013.01.016