Synthesis and characterization of a new catalyst Pt/Mg(Ga)(Al)O for alkane dehydrogenation

Effect of microwave calcination on catalytic properties of Pt/MgAl(Sn)Ox catalyst in cyclohexane dehydrogenation to cyclohexene

“…Taking into the account the fact that the surface free energies of SnOx were less than that of Al 2 O 3 and MgO, the dispersion of SnOx on the surface of MgAlO oxide was favored [39]. Upon the reduction of the catalysts at high temperature, a portion of the Sn 4+ near the surface of the support was reduced to Sn atoms and then migrated and interacted with Pt nanoparticles to form PtSn alloys, which was in accordance with the studies of PtGa alloys on Pt/MgAl(Ga)Ox [18]. For the migration of Sn in the Pt/MASOM catalyst, from the H 2 -TPR and XPS measurements, a larger proportion of Sn migrated to the surface in comparison with that of the Pt/MASOW catalysts, but the proportion increased with rise of calcination temperature in microwave calcination and conventional calcination systems.…”

“…Recently, hydrotalcite-derived support (MgAlOx) is broadly used because it is moderately basic and exhibits high thermal stability and the Al cations help stabilize the dispersed Pt nanoparticles against sintering [14][15][16]. Moreover, a further attraction is that it can be prepared with elements other than Al, e.g, Zn, Ga, In [17][18][19].…”

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

“…[31][32][33][34][35][36] Wet incipient impregnation and incorporation of the active metals in the support appear to offer promising perspectives for implementation at a larger scale. 2,37,38 Indeed, incorporation of the active metals within the support via a one pot synthesis is an easy and reproducible route for bimetallic catalyst synthesis. For propane dehydrogenation into propene, incorporation of the active metals in a hydrotalcite-based support has already proven to yield superior catalysts when compared with wet incipient impregnation.…”

“…39 Via the incorporation of the active materials in a single-phase hydrotalcite-based precursor, stable nanoparticle catalysts are obtained after calcination and reduction. [37][38][39][40][41][42][43][44][45] Hydrotalcite-based catalysts currently gain interest due to promising properties, such as active phase dispersion and stability, both in metal and in base catalysis. [38][39][40][41][42][43][44][45][46][47][48][49][50][51] Their composition is denoted as .…”

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.…”