Liquid-phase glycerol hydrogenolysis to 1,2-propanediol under nitrogen pressure using 2-propanol as hydrogen source

Abstract:This review provides an overview of heterogeneous bimetallic Pd-Fe catalysts in the C-C and C-O cleavage of platform molecules such as C2-C6 polyols, furfural, phenol derivatives and aromatic ethers that are all easily obtainable from renewable cellulose, hemicellulose and lignin (the major components of lignocellulosic biomasses). The interaction between palladium and iron affords bimetallic Pd-Fe sites (ensemble or alloy) that were found to be very active in several sustainable reactions including hydrogenolysis, catalytic transfer hydrogenolysis (CTH) and aqueous phase reforming (APR) that will be highlighted. This contribution concentrates also on the different synthetic strategies (incipient wetness impregnation, deposition-precipitaion, co-precipitaion) adopted for the preparation of heterogeneous Pd-Fe systems as well as on the main characterization techniques used (XRD, TEM, H 2 -TPR, XPS and EXAFS) in order to elucidate the key factors that influence the unique catalytic performances observed.

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“…Therefore, the main issue consists in reducing the oxygen content through deoxygenative and CTH/APR processes [224][225][226][227][228][229].…”

Section: C-c and C-o Bond Breaking In C2-c6 Polyolsmentioning

confidence: 99%

Upgrading Lignocellulosic Biomasses: Hydrogenolysis of Platform Derived Molecules Promoted by Heterogeneous Pd-Fe Catalysts

et al. 2017

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“…Gandarias et al have deeply studied the reactivity of bimetallic catalysts Ni-Cu/Al2O3, prepared through the sol-gel technique, giving the best performances when pretreated at 450 °C [47][48][49]. At the beginning, the hydrogenolysis of glycerol was studied either in presence of molecular hydrogen or in conditions in which the hydrogen is produced in situ, through the aqueous phase reforming (APR) or through the catalytic transfer hydrogenolysis (CTH) by means of 2-propanol [47]. Results suggest that 2-propanol is a more effective hydrogen source than the aqueous-phase reforming, for the glycerol hydrogenolysis process.…”

Section: Glycerol and Other Polyolsmentioning

confidence: 99%

“…Two different mechanisms are involved when the hydrogenolysis of glycerol is performed in the presence of molecular hydrogen or in that of 2-PO (Scheme 2). Moreover, the deactivation of the catalyst occurs more rapidly in the presence of 2-PO, because adjacent sites are required for the donor and the acceptor processes relative to the transfer reaction, during the hydrogenation [47]. hydrogenated into 1,2-propanediol (Scheme 1) [46].…”

Section: Glycerol and Other Polyolsmentioning

confidence: 99%

Catalytic Transfer Hydrogenolysis as an Effective Tool for the Reductive Upgrading of Cellulose, Hemicellulose, Lignin, and Their Derived Molecules

et al. 2018

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Lignocellulosic biomasses have a tremendous potential to cover the future demand of bio-based chemicals and materials, breaking down our historical dependence on petroleum resources. The development of green chemical technologies, together with the appropriate eco-politics, can make a decisive contribution to a cheap and effective conversion of lignocellulosic feedstocks into sustainable and renewable chemical building blocks. In this regard, the use of an indirect H-source for reducing the oxygen content in lignocellulosic biomasses and in their derived platform molecules is receiving increasing attention. In this contribution we highlight recent advances in the transfer hydrogenolysis of cellulose, hemicellulose, lignin, and of their derived model molecules promoted by heterogeneous catalysts for the sustainable production of biofuels and biochemicals.

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“…Various studies have been conducted in connection with the transformation of glycerol, such as steam reforming [2,3], hydrothermal [4,5], catalytic hydrogenation [6], the catalytic dehydration [7], pyrolysis [4,8], hydrogenolysis [9,10]. Those previous investigations produced both liquid compounds (methanol, formaldehyde, acetaldehyde and others) and gas compounds (CO2, butane, hydrogen and others).…”

Section: Introductionmentioning

confidence: 99%

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

Kalla

Sumarno

Mahfud

2015

Bull. Chem. React. Eng. Catal.

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This research aims to study the effect of the addition of the catalyst γ-Al2O3 on the degradation of glycerol with using sonication method. This degradation reaction performed with the aid of a catalyst γ-Al2O3 or without a catalyst. Reactants were prepared from glycerol-water mixture with a mass ratio of 1:8. Experiment was carried out in a batch reactor at atmospheric pressure, temperature range between 30-70 °C for 10-90 min. The products, which were degraded from glycerol, were analyzed by gas chromatography (GC). The results showed that the ultrasonic wave radiation could degrade glycerol. The glycerol conversion was 2.92%-59.95% without employing catalyst, while the conversion of glycerol increased with adding γ-Al2O3.catalyst. It was found that methanol, allyl alcohol and acrolein were degradation products.

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Liquid-phase glycerol hydrogenolysis to 1,2-propanediol under nitrogen pressure using 2-propanol as hydrogen source

Cited by 119 publications

References 37 publications

Upgrading Lignocellulosic Biomasses: Hydrogenolysis of Platform Derived Molecules Promoted by Heterogeneous Pd-Fe Catalysts

Upgrading Lignocellulosic Biomasses: Hydrogenolysis of Platform Derived Molecules Promoted by Heterogeneous Pd-Fe Catalysts

Catalytic Transfer Hydrogenolysis as an Effective Tool for the Reductive Upgrading of Cellulose, Hemicellulose, Lignin, and Their Derived Molecules

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

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