Catalyst performance of novel Pt/Mg(Ga)(Al)O catalysts for alkane dehydrogenation

Platinum‐Promoted Ga/Al2O3 as Highly Active, Selective, and Stable Catalyst for the Dehydrogenation of Propane

“…A few papers have already been published, in which Pt and Ga were combined to produce PDH catalysts, but in these systems Ga is deemed to function as a promoter element, with Pt being the active dehydrogenation element. [7] This is in contrast with our current catalyst, in which Pt is present in minute amounts and Ga is the active dehydrogenation element. A clear synergistic effect is observed between both components, which results in a very stable catalyst material that is highly resistant to deactivation, e.g., by coking.…”

“…Alternatively, a Pt-Ga alloy may be formed by hydrogen spillover from the Pt, whereby Ga 3+ is reduced to Ga 0 , which then forms the alloy. [7,14] TPR and quasi-in situ XPS was employed to investigate the reducibility of the 3Ga and Pt3Ga catalysts. The temperature-programmed reduction (TPR) experiment showed that no hydrogen was being consumed while the catalyst was heated up to 700 8C under a constant hydrogen flow ( Figure S8).…”

Formation and stability of an active PdZn nanoparticle catalyst on a hydrotalcite-based support for ethanol dehydrogenation

“…38,[41][42][43][44]51,52 Deactivation due to coking on metal clusters is often reported as the cause of activity decline of hydrotalcite-based bimetallic catalysts. 41,43,52 Hence, the development of activation or regeneration procedures is of significant importance for enhancing the catalyst life-time and its potential commercial exploitation. Akporiaye et al 52 investigated the effect of a single reduction as activation procedure for a PtSnCs on hydrotalcite catalyst for propane dehydrogenation, compared to a reduction-oxidation-reduction cycle before the start of the reaction.…”

“…They observed a higher initial activity and improved stability after such a reduction-oxidation-reduction cycle. Siddiqi et al 43 investigated the fundamental cause for the initial activity loss and increase in selectivity to the desired alkenes during ethane and propane dehydrogenation over Pt. They found that cokes are first formed on the very reactive unalloyed Pt particles and then partially transferred from the Pt particles to the support.…”

The influences of Mg/Al molar ratio on the properties of PtIn/Mg(Al)O- x catalysts for propane dehydrogenation reaction

“…However, monometallic Pt supported catalysts exhibited low olefin selectivity, catalyst activity and stability [6]. Doping additional promoters such as Sn, Pb, Ga, Ge, Zn, Ca, Cu, In or Na to interact with Pt could improve the catalytic performances and suppress coke formation in propane dehydrogenation reaction [3,[7][8][9][10][11][12][13][14][15][16][17]. The bimetallic Pt-Sn supported catalysts have been widely studied in the open literatures.…”