Preparation and characterisation of calcined Mg/Al hydrotalcites impregnated with alkaline nitrate and their activities in the combustion of particulate matter

Synthesis and Characterization of Ni/Hydrotalcite and Its Application in Hydrocracking Calophyllum Inophyllum Oil

“…Meira [12] found the same peak that correspond to MgO (Magnesium Oxide). Comelli [13] reported that hydrotalcite is calcined at 600°C a form of magnesium oxide is observed, as shown at Fig.3.…”

Hydrotalcite-Impregnated Copper and Chromium-Doped Copper as Novel and Efficient Catalysts for Vapor-Phase Hydrogenation of Furfural: Effect of Clay Pretreatment

“…According to the previous reports (Mallik et al, 2006), this observation can be ascribed to the high dispersion of promoter on the catalyst. A well-crystallized periclase (MgO) structure was formed along with a tenorite phase in the pre-calcined samples, indicating the partial collapse of the hydrotalcite structure (Shylesh et al, 2016;Comelli et al, 2013). Moreover, the XRD patterns of CHT1 and CHT2 gave no reflection for the presence of additional alumina phases; the diffraction peaks of these catalysts presented slightly higher 2θ values compared to those of pure periclase, suggesting that the Al 3+ cations were incorporated into the MgO lattice (Shylesh et al, 2016;Kanezaki, 1998).…”

Synergistic effects of gamma irradiation on the PET surface and heat treatment of hydrotalcite catalyst supported by Pt/TiO2 nanoparticles on PET depolymerization rate

“…This finding showed that the higher calcination temperature led to a larger particle size because of the crystal growth of the MgO structure within the MgAl 2 O 4 phase. The XPS analysis showed that an increase of the Al/Mg molar ratio occurred with increasing the calcination temperature, which indicated the calcination at high temperatures (1173–1273 K) resulted in an increase of Al atoms on the surface of the bimetallic oxides 22,26 . Wang et al 15 showed that the three basic sites, including O 2− and O − species, and hydroxyl (OH) groups, are formed on the surface of HT after the calcination process.…”