Pt supported on Zn modified silicalite-1 zeolite as a catalyst for n-hexane aromatization

Insight into the performance of different Pt/KL catalysts for n-alkane (C6–C8) aromatization: catalytic role of zeolite channels

“…S4† shows the XPS spectra of Pt 4f and K 2p over Pt/KL- x catalysts to analyse the electronic properties of the Pt clusters. The Pt 4f 5/2 peaks of the Pt/KL- x catalysts were sited at about 70.5 eV, lower than the binding energy (71.3 eV) of zerovalent Pt (Pt 0 ), 4,41 suggesting that electron-rich Pt species (Pt δ − ) were formed by electrons being transferred from the KL zeolite to the Pt clusters. The electron transfer was further confirmed from K 2p XPS spectra (Fig.…”

“…Pt-based catalysts have been applied in the reforming of light naphtha for decades, owing to their superior ability for the cleavage of C–H bonds. 4 For example, Pt supported on β zeolite, Y zeolite, ZSM-5 zeolite and KL zeolite exhibits outstanding properties for n -alkane aromatization. Among them, Pt loaded on non-acidic KL zeolite has become the preferred catalyst for converting linear C6 paraffins into aromatics and has attracted much attention since it was discovered by Bernard.…”

“…9 However, its special 1D large pore structure is a considerable factor in its highly efficient aromatization performance. 4,10–12…”

Redispersion of Pt nanoparticles encapsulated within ZSM-5 at high temperature oxygen for partial oxidation of methane

“…The doublet due to Pt 4f 7/2 and Pt 4f 5/2 should be with the constrain: spin orbit separation = 3.3 eV and area ratio of Pt 4f 7/2 : Pt 4f 5/2 = 4:3, therefore, we can appropriately determine the peak of Pt 4f at the overlap with Al 2p [46]. Similar to most supported catalysts, the fresh Pt/ZSM-5 includes abundant of Pt 0 and Pt δ+ (the ratio of Pt δ+ /Pt 0 = 1.12) [47]. But for the Pt@ZSM-5, the Pt δ+ is more than that of Pt 0 (the ratio of Pt δ+ /Pt 0 = 3.45) under the same as Pt/ZSM-5 preparation conditions.…”

A Comparative Study of Aromatization Catalysts: The Advantage of Hybrid Oxy/Carbides and Platinum-Catalysts Based on Carbon Gels

“…Nowadays, the optimization of aromatization catalysts continues to be of great interest to the scientific community, as demonstrated by the high number of recent publications in this field [5,[11][12][13][14] . Reforming of light alkanes is carried out using zeolites, mainly medium pore-size ZSM-5 zeolite which presents molecular shape selectivity towards benzene, toluene and xylene (BTX).…”