Performance of Ethane Dehydrogenation over PtSn Loaded onto a Calcined Mg(Al)O LDH with Three Mg:Al Molar Ratios Using a Novel Method

Abstract

Layered double hydroxide (LDH) is a layered solid containing positively charged layers with negatively charged anions as an interchangeable interlayer. In this research, Mg(Al)O supports were synthesized with three different Mg:Al molar ratios, and bimetallic PtSn catalysts were loaded onto the supports via the anion exchange method. The properties of ethane dehydrogenation of the PtSn/Mg(Al)O catalysts were investigated. The results show that the structure and properties of the PtSn/Mg(Al)O catalysts were influenced by the Mg:Al molar ratio of the hydrotalcites, which consequently influenced the ethane dehydrogenation performance. When the Mg:Al ratio was 5:1, the ethane dehydrogenation performance was optimal, relative to the Mg:Al ratios of 2:1 and 10:1.

Stability studies of PtSn structured catalysts supported on thin layers of MAl2O4 (M: Mg, or Zn) for paraffins dehydrogenation reactions

“…Such an effect was attributed to the segregation of SnOx species to the surfaces of the bimetallic particles, while the Al 2 O 3 ‐supported catalysts showed a better behaviour. What is more, Fang et al [ 37 ] investigated PtSn catalysts supported on Mg(Al)O layered double hydroxides with different Mg/Al ratios, which exhibited moderate acid–base properties and a high thermal stability to steam and reduction–oxidation cycling. These catalysts showed small metallic particle sizes, and their performance in ethane dehydrogenation was good depending on the Mg/Al ratio used.…”

Catalytic Cracking of Waste Tires using Nano‐ZSM‐5/MgAl‐LDO

“…As shown in Figure 5 a, the pore size distribution of nano‐HZSM‐5 consists of micropores and small mesopores of 2‐4 nm, where mesopores are commonly observed in nano‐zeolites on account of the external surface and intercrystalline porosity. [ 30,31 ] The micropores and mesopores of MgAl‐LDO (Figure 4b and 5b) are seen from the N 2 adsorption‐desorption isotherm corresponding to type IV with an H4‐type hysteresis loop, [ 32,33 ] and pore size distribution consists of micropore and small mesopores of 2‐5 nm, which might be due to interlayer carbonate decomposition and water desorption. The isotherm of nano‐HZSM‐5/MgAl‐LDO composites (Figure 4c) shows the characteristics of type IV isotherms with an H3‐type hysteresis loop, which is the most common adsorption behavior of mesoporous materials.…”

Catalytic Dehydrogenation on Ultradisperse Sn-Promoted Ir Catalysts Supported on MgAl2O4 Prepared by Different Techniques

“…The most common metals used in catalysts for dehydrogenation reactions are Pt or Pd accompanied by metallic promoters such as Sn, In, Ga and Ge [4][5][6][7][8][9][10]. Among the noble metals, Ir has been little studied for this type of dehydrogenation reaction.…”