TY - JOUR
T1 - 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
AU - Mazoyer, Etienne
AU - Szeto, Kaï Chung
AU - Merle, Nicolas
AU - Norsic, Sébastien
AU - Boyron, Olivier
AU - Basset, Jean-Marie
AU - Taoufik, Mostafa
AU - Nicholas, Christopher P.
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2013/5
Y1 - 2013/5
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/562744
UR - https://linkinghub.elsevier.com/retrieve/pii/S0021951713000286
UR - http://www.scopus.com/inward/record.url?scp=84875987903&partnerID=8YFLogxK
U2 - 10.1016/j.jcat.2013.01.016
DO - 10.1016/j.jcat.2013.01.016
M3 - Article
SN - 0021-9517
VL - 301
SP - 1
EP - 7
JO - Journal of Catalysis
JF - Journal of Catalysis
ER -