The role of Ni sites located in mesopores in the selectivity of anisole hydrodeoxygenation

Abstract

A highly-dispersed Ni catalyst with an increased number of Ni sites selectively distributed in the mesopores of HBEA has been developed and applied in anisole hydrodeoxygenation (HDO) in a continuous-flow...

Anisole Hydrodeoxygenation over Nickel-Based Catalysts: Influences of Solvent and Support Properties

“…As the pressure increased from 20 to 40 and 60 bar, the conversion increased from 54.4% to 70.4% and 92.1%, while the cyclohexane yield increased from 46.5% to 61.0% and 82.5%, respectively. Although, at high pressure, it is widely known that aromatic ring hydrogenation is favored over direct deoxygenation . Herein, no liquid product containing an oxygen atom was detected at any point during the reaction within the range of pressure investigated.…”

“…Although, at high pressure, it is widely known that aromatic ring hydrogenation is favored over direct deoxygenation. 61 Herein, no liquid product containing an oxygen atom was detected at any point during the reaction within the range of pressure investigated. Strong dependency of anisole conversion on hydrogen pressure was also reported by Ghampson et al, 58 who demonstrates that the demethoxylation (direct deoxygenation) pathway is most significantly influenced by changing hydrogen pressure.…”

Engineering a Ni1Fe1–ZnO Interface to Boost Selective Hydrogenation of Methyl Stearate to Octadecanol

“…Figure 4b shows that the band of NiFe/SiO 2 at 1604 cm −1 is due to a Ni-H vibration, formed by dissociated H species from the homolytic cleavage of H 2 coordinated to surface Ni species. 65,66 The band of NiFe/ZnO at 1597 cm −1 is red-shifted compared to NiFe/SiO 2 , which may be related to the Ni-H − vibration. The band of NiFe/SiO 2 at 1268 cm −1 in Figure 4c may be attributed to the vibration of ZnO-OH 2 .…”

Selective CO2hydrogenation over zeolite-based catalysts for targeted high-value products

“…Na + , NH 4 + , H + ), which in turn generated Brønsted acid sites (BASs) if they are counterbalanced by H + . 122,123 Due to the conned space around the active sites and the restricted access to and exit from the internal surface, zeolites are widely use as shape-selective catalysts in variety of chemical reactions, such as CO 2 hydrogenation, 57 synfuels production, 124 oil renery, [125][126][127][128][129][130] biomass pyrolysis, 131,132 etc. FTS pathways for hydrogenation of CO 2 to selectively produce methanol, [40][41][42] ethanol, 43,44 dimethyl ester (DME), [45][46][47] LPG, [48][49][50][51] olefins, 48,52-56 aromatics, [57][58][59] and other hydrocarbons.…”

“…Na + , NH 4 + , H + ), which in turn generated Brønsted acid sites (BASs) if they are counterbalanced by H + . 122,123 Due to the confined space around the active sites and the restricted access to and exit from the internal surface, zeolites are widely use as shape-selective catalysts in variety of chemical reactions, such as CO 2 hydrogenation, 57 synfuels production, 124 oil refinery, 125–130 biomass pyrolysis, 131,132 etc.…”