Highly dispersed NbOPO4/SBA-15 as a versatile acid catalyst upon production of renewable jet-fuel from bio-based furanics via hydroxyalkylation-alkylation (HAA) and hydrodeoxygenation (HDO) reactions

Uso de compostos de nióbio como catalisadores na produção de biocombustíveis: uma revisão

“…On the other hand, the presence of strong Brønsted sites favored the simultaneous breaking of C-O and C-C bonds, producing lighter and linear compounds. In this sense, silica-supported niobium phosphate catalysts have adequate acidic and textural properties, resulting in an excellent catalytic performance for the tested reactions, being a potential alternative for the conversion of biomass into bio-jet fuel (Samikannu et al, 2020). Regarding the presented results, this work shows the potential of dispersing niobium-based compounds over supports as an approach to tailor and control the properties of the final material, such as acidity and morphology.…”

“…In the tested reaction conditions, this catalyst had a 983 h -1 turnover frequency (TOF) and 92.6 % yield on HAA products. The authors justified the superior performance of this material based on its acidic characteristics, such as the greater ratio between the number of acidic Brønsted and Lewis sites and greater strength of the acidic sites, as well as from the uniform distribution and exposure of these acidic sites on the surface of mesoporous support (Samikannu et al, 2020). Tests for the HDO of HAA products over bifunctional catalysts with Pd also showed the potential of the synthesized materials to produce HCs from the furan adduct.…”

Production of jet fuel-range hydrocarbon biofuel by hydroxyalkylation–alkylation of furfural with 2-methylfuran and hydrodeoxygenation of C15 fuel precursor over a Ni/γ-Al2O3 catalyst: a reaction mechanism

“…The noble metal-based catalysts are, however, costly with limited industrial applications. The focus has been shifted to bifunctional catalysts for one-pot synthesis of fuel-range alkanes, such as Pd loaded NbOPO 4 /SBA-15, Nb 2 O 5 /SBA-15, and FeO x /SiO 2 and Ru/HAP combined with HZSM-5 [29][30][31] . However, the multifunctional catalysts involve complex preparation methods 32 .…”

Selective Hydrogenation of the Carbonyls in Furfural and 5-Hydroxymethylfurfural Catalyzed by PtNi Alloy Supported on SBA-15 in Aqueous Solution Under Mild Conditions

“…Given this background, we design a SBA-15 (Santa Barbara Amorphous-15, a stable mesoporous silica molecular sieve, which was developed by researchers at the University of California at Santa Barbara) supported PtNi nanoalloys catalyst for the C=O hydrogenation of FF/HMF in water under mild conditions, since SBA-15 with advantageous feature (e.g., high heat resistance, variable framework compositions, and low diffusion barrier for the reactants) has been reported to efficiently adsorb carbonyl groups, which could further promote the selective carbonyl hydrogenation ( Zhao et al, 1998 ; Huang et al, 2014 ; Deng et al, 2019 ; Samikannu et al, 2020 ). The catalyst was synthesized by a two-step method without the use of gaseous hydrogen or NaBH 4 as reductant ( Figure 1 ).…”