A series of cobalt-promoted Ni-Mg-Al hydrotalcite-derived catalysts were tested towards CO2 methanation reaction. The best among examined was the one with 1 wt% cobalt in fresh hydrotalcite, obtaining 77% conversion and 99% CH4 selectivity at 300 °C. Above that temperature, catalyst working with-near-equilibrium parameters. It also stable for up to 24 h on stream. Other cobalt-containing sample...

Abstract Reforming of toluene with model exhaust gas was carried out as Reformed EGR gasoline engine mainly at 773 K Ni-M/Mg/Al (Ni 12 wt%, M = Fe, Co, Cu) prepared from corresponding hydrotalcite-like compounds. Ni-Fe/Mg/Al (Fe/Ni = 0.1–0.5) showed clearly higher performance than Ni/Mg/Al in terms activity, coke-deposition resistance and stability. In contrast, (M/Ni = 0.25, M = Co, similar be...

Nano-copper(0) stabilized on alumina prepared from Cu-Al hydrotalcite has been reported for completely regioselective synthesis of 2,4-disubstituted pyrroles from unactivated terminal aromatic/aliphatic alkynes and isocyanides. The reaction is operationally simple, involves ligand-free inexpensive nano-copper, and affords products in high yields.

There is variability in the Mg isotopic composition that is a reflection of the widespread heterogeneity in the isotopic composition of the elements in the solar system at approximately 100 ppm. Measurements on a single calcium-aluminum-rich inclusion (CAI) gave a good correlation of Mg ⁄ Mg with Al ⁄ Mg, yielding an isochron corresponding to an initial (Al ⁄ Al)o = (5.27 ± 0.18) · 10 and an in...

The development of effective, environmentally friendly catalysts for the Baeyer–Villiger reaction is becoming increasingly important in applied catalysis. In this work, we synthesized a 3D composite consisting silica spheres coated with Mg/Al hydrotalcite much better textural properties than its 2D counterparts. fact, solid outperformed 2D-layered as catalyst cyclic ketones H2O2/benzonitrile ox...

Monolithic catalysts derived from in situ supported hydrotalcite-like films on Al wires display high resistance to coke formation and sintering in the dry reforming of methane due to their hierarchical porous structure, well dispersed metallic nickel species, more basic sites and strong metal-support interaction effect.