Influence of Lewis acidity of rhenium heptoxide supported on alumina catalyst on the catalytic performances in olefin metathesis

Effects of Zinc and Magnesium Addition to ZSM-5 on the Catalytic Performances in 1-hexene Aromatization Reaction

“…Both Br/ Fig. 3a [22][23][24]. After introduction of Mg or Zn species, the peak intensity at 1545 and 1640 cm -1 is reduced indicating Br/nsted acid sites are preferentially consumed [25,26].…”

Metathesis of 1-hexene over rhenium oxide supported on ordered mesoporous aluminas: comparison with Re2O7/γ-Al2O3

“…However, a certain acidity level appears to be necessary for the ReO 4 species be active enough although the nature of this acidity is still a subject of debate. So both Brönsted [13] and Lewis acidity [14] has been claimed to be effective for the olefin metathesis reaction. To the light of these facts, some strategies have been proposed to increase the activity of Re 2 O 7 /Al 2 O 3 catalysts, such as the addition of another metal…”

Tuning the Selectivity of Alumina‐Supported (CH3)ReO3 by Modifying the Surface Properties of the Support

“…Acidity measurements with pyridine [14][15][16] showed that most of the stronger Lewis acid sites had been consumed and that the weaker ones had only been partially consumed (see Figure S1 in the Supporting Information). Overall, these experimental data are consistent with a reaction of AllylTMS with the hydroxy groups of alumina to give trimethylsilyl surface species (Scheme 1 a).…”