Aromatization of ethane on Pt and Pd supported Zn- and Mn-ZSM-5 zeolites

Modification of acid supports by solid-state redox reactionPart I. Preparation and characterization

“…Thus, gallium or zinc-exchanged ZSM-5 zeolites have been found useful for the conversion of lower alkanes into aromatic hydrocarbons [1]; other metal ions were also tested [1,2]. Iron-containing zeolites have been studied in the selective catalytic reduction of NO [3,4] or the oxidation of aromatic hydrocarbons [5], nickel ionexchanged zeolites in the oligomerization of olefins [6], and Mg-ZSM-5 zeolites in the alkylation of toluene with methanol [7].…”

“…This reaction can be regarded as the solid-state analogue to the dissolving of zinc oxide in liquid acids. Further, the solid-state reaction between metallic zinc and various zeolites, (2) Zn + 2H-zeolite → Zn 2+ -(zeolite) 2 + H 2 , came into focus [15][16][17][18] as an alternative reaction. Also this reaction has its counterpart in solution.…”

The effect of active site distribution in bi-functional Pt-zeolite catalysts for ethane dehydroaromatization

“…Acidic ZSM-5 is usually combined with effective hydrogenating metals such as Pt [2,3], Pd [4] and Ru [5] or metal cations (e.g. Zn, Ga) [6][7][8], to achieve higher catalytic activity.…”

The Cross-Coupling of Methane with Nonoxidative Hydrocarbons

“…4.17 The effect of external surface coverage on BTX selectivity and yield for promoter loaded Zn/HZSM-5 catalysts [21] Pt and Zn have for these reactions. As previously mentioned, the enhanced dispersion of metallic functions as promoted by Pt is one reason for improved performance as well as the findings made by Mroczek et al [66] where Pt-Zn/HZSM-5 resulted in the highest aromatization activity in their investigation on the aromatization of ethane. It was concluded that Pt and Zn can exhibit a stronger interaction between the corresponding metallic sites and show a higher activity towards aromatization.…”