Hydrodeoxygenation of lignin-derived phenols to produce hydrocarbons over Ni/Al-SBA-15 prepared with different impregnants

Effect of Metal Loading in Unpromoted and Promoted CoMo/Al2O3–TiO2 Catalysts for the Hydrodeoxygenation of Phenol

“…To achieve this, catalytic hydrodeoxygenation (HDO) can be used to eliminate oxygen and to hydrogenate instaurations for hydrocarbons chains. HDO can proceed in a wide range of temperatures (200-400 • C) and pressure (1)(2)(3)(4)(5)(6)(7) [5,6]. Also, as some oxygenated molecules present in pyrolysis oils are soluble in water, aqueous phase reactions can be carried out in the presence of a catalyst [7,8].…”

“…Several works have been focused on the improvement of their catalytic properties, for instance selectivity, activity, and active phase dispersion [2,[9][10][11][12]. These studies have used resulting lignin representative probe molecules, for example, guaiacol, eugenol, furans, cresol, catechol, anisole, and phenol, to understand catalytic performance and functionalities [7,[13][14][15]. Particularly, phenol has been used as a probe molecule since its reactions could expose information about the reactivity of the C AR -OH bond and hydrogenation capacity of the catalyst.…”

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

“…The broad envelope band of the absorption water and the hydroxyl bonds at the surface were observed at around 1600 and 3500 cm −1 , respectively. 63,70 But the primary structural vibrations of any molecular sieve are located at 1600 to 400 cm −1 . The asymmetric stretching vibrations of silanol Si–O–Si are represented by the wide band at around 1080 cm −1 with a shoulder peak at 1230 cm −1 .…”

“…The broad envelope band of the absorption water and the hydroxyl bonds at the surface were observed at around 1600 and 3500 cm −1 , respectively. 63,70 But the primary structural vibrations…”

Influence of Brønsted acid sites on the product distribution in the hydrodeoxygenation of methyl laurate over supported Ru catalysts

“…A few studies indicated that Lewis acid sites played a pivotal role in controlling activity or selectivity in hydrodeoxygenation. [7][8][9][10] For example, Shang et al found that Ni supported on mixed metal oxides (Ni x Zn y Al z -MMO), which was obtained from a NiZnAl layered double hydroxide precursor through calcination and reduction, was effective for the hydrodeoxygenation of vanillin to 2-methoxy-4methylphenol (MMP). The selectivity to MMP increased significantly with the increase in Lewis acid sites of ZnO species.…”