The relationship between acidity, dispersion of nickel, and performance of Ni/Al-SBA-15 catalyst on eugenol hydrodeoxygenation

Highly Selective Hydrodeoxygenation of Dibenzofuran into Bicyclohexane over Hierarchical Pt/ZSM-5 Catalysts

“…This was very consistent with the above catalytic results. Some previous studies pointed out that the small metal (Pd) nanoparticles could provide a high conversion rate of phenol, 46 and the synergistic effect of small Ni nanoparticles and acidic sites made aromatic compounds preferentially produce cyclohexane in the HDO of guaiacol. 47 Therefore, it could be inferred that the suitable acidity distribution of the support and the smaller metal nanoparticle in Pt/HZ-75 together enhanced the catalytic performance in the HDO of DBF.…”

Construction of a highly active and water-resistant Ni-based catalyst for the HDO reaction of phenol

“…Compared with many other transition metals, Ni has a wider d electron band and higher energy density near the lattice plane, 23 and moreover, Ni possesses the lowest unoccupied molecular orbital (LUMO). 24 If these unique characteristics of Ni-based catalysts could greatly improve hydrogen adsorption performance, then more active H species could be provided for the hydrogenation reactions, leading to better HDO activity. 25 It has been reported that bifunctional catalysts are usually needed for the HDO reaction, in which metal sites catalyze the hydrogenation, while acid sites take the responsibility to improve the dehydration/deoxygenation.…”

“…Compared with many other transition metals, Ni has a wider d electron band and higher energy density near the lattice plane, 23 and moreover, Ni possesses the lowest unoccupied molecular orbital (LUMO). 24 If these unique characteristics of Ni-based catalysts could greatly improve hydrogen adsorption performance, then more active H species could be provided for the hydrogenation reactions, leading to better HDO activity. 25…”

Direct synthesis of dimethyl ether from CO2 hydrogenation over a highly active, selective and stable catalyst containing Cu–ZnO–Al2O3/Al–Zr(1 : 1)-SBA-15

“…It is known from the literature that Al and Zr incorporation in the SBA-15 framework generates weak, medium and strong acidic sites. 66,67 From the N 2 adsorption–desorption analysis, it was confirmed that Zr ion introduction in the SBA-15 framework results in a high surface area and small pore diameter, whereas Al introduction results in a comparatively low surface area but wider pore diameter. Therefore, the same metal ratio Si : M = 10, but different metal compositions (Al : Zr = ∞, 3, 1, 0.33, 0) gives different acidities (Table 2).…”