Tuning zirconia-supported metal catalysts for selective one-step hydrogenation of levoglucosenone

Abstract

One-pot selective hydrogenation of levoglucosenone to Cyrene and levoglucosanol was successfully carried out by using Pd/ZrO2 and Pt/ZrO2 catalysts, respectively.

Influence of Ti Incorporation to Bimetallic Mesoporous Carbon in the Production of 2,5-Dimethylfuran from Biomass Derivatives

“…The formation of the PtIr alloy on the mesoporous carbon also prevents the successive In our previous work [13], we demonstrated that the PtIr alloy combined the hydrogenating capacity of Pt and the hydrogenolysis capacity of Ir. The high activity and selectivity of Pt for C = O hydrogenation, is controlled by the presence of Ir to improve the selectivity to DMF, thus preventing the subsequent hydrogenation [63,64]. This fact was understood in terms of the rapid conversion of BHMF via MFA to give DMF through a hydrogenolysis site provided by Ir in the bimetallic alloy.…”

“…In this way, the charge density on the bimetallic sites decreases. The high rate of hydrogenation of the C = O bond by Pt [63][64][65][66], makes this reaction difficult to control and that the reaction continues to form undesired products. The presence of a second metal forming an alloy, as is the case with Ir, favors the control of the reaction towards the formation of DMF.…”

Catalytic Strategies for Levoglucosenone Production by Pyrolysis of Cellulose and Lignocellulosic Biomass

“…Cyrene is also used as a synthetic raw material and for extracting valuable bioactive compounds, such as hesperidin and rutin . Deeper hydrogenation converts LGO into levoglucosanol and then tetrahydrofurandimethanol (THFDM). , The hydrogenolysis products of THFDM, 1,2,6-hexanetriol and 1,6-hexanediol, are widely used in industry for polyester and polyurethane production. Huber’s research group also commenced studies on the conversion of LGO into 5-hydroxymethylfurfural (HMF). , HMF is one of the most promising platform chemicals in sugar chemistry with great industrial potential and a broad range of applications .…”

Production of Hexane-1,2,5,6-tetrol from Biorenewable Levoglucosanol over Pt-WOx/TiO2

“…7,9,18,19 Also, when adding Cyrene to water, a powerful hydrotrope is created, the central aspect to this phenomenon being Cyrene's geminal diol. 20 Other potentially useful LGOderived molecules are Lgol, 17,21,22 tetrahydrofuran-dimethanol 22,23 (THFDM), hexane-1,2,6-triol (HTri), 24,25 hexane-1,6diol 22,25−29 (1,6-HD), and tetrol. 28,30 The main reactants and products of interest for this work are shown in Figure 1.…”

“…LGO is a highly functionalized molecule that can be used in asymmetric synthesis, , to create chiral pure pharmaceutical intermediates, , and for the synthesis of chemicals useful to the creation of polymers, such as hydroxymethylfurfural , (HMF). It has equally been established that dihydrolevoglucosenone (Cyrene) obtained from LGO hydrogenation is a benign low-toxicity polar aprotic solvent with similar properties as dimethylformamide (DMF) or N -methylpyrrolidone (NMP). ,,, Also, when adding Cyrene to water, a powerful hydrotrope is created, the central aspect to this phenomenon being Cyrene’s geminal diol . Other potentially useful LGO-derived molecules are Lgol, ,, tetrahydrofuran-dimethanol , (THFDM), hexane-1,2,6-triol (HTri), , hexane-1,6-diol ,− (1,6-HD), and tetrol. , The main reactants and products of interest for this work are shown in Figure .…”