Hydrodeoxygenation processes: Advances on catalytic transformations of biomass-derived platform chemicals into hydrocarbon fuels

De, Sudipta; Saha, Basudeb; Luque, Rafael

doi:10.1016/j.biortech.2014.09.065

Cited by 307 publications

(192 citation statements)

References 79 publications

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“…Among several chemistries and technologies, hydrogenolysis processes have gained a lot of attention since it allows the breaking of carbon-carbon and/or carbon-oxygen bonds in the presence of a hydrogen source [66][67][68]. One of the main drawbacks in hydrogenolysis, also known as "hydrodeoxygenation" if referred to C-O bond breaking, is concerning the hydrogen management due to the poor solubility of molecular H 2 that leads to a considerable safety hazard.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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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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Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…However, crude bio-oil from biomass [1][2][3] has some signicant disadvantages as vehicle fuel, such as high acid content, viscosity and corrosion, chemical instability and low caloric value. In order to solve these problems, catalytic cracking, 4,5 aldol condensation 6,7 and catalytic hydrodeoxygenation (HDO) have been adopted.…”

Section: Introductionmentioning

confidence: 99%

Highly selective hydrodeoxygenation of anisole, phenol and guaiacol to benzene over nickel phosphide

Juan

Chen

2017

RSC Adv.

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Ni 2 P supported catalysts have extensively been studied for various hydrodeoxygenation (HDO) reactions.However, the main products are cyclohexane or cyclohexanol for lignin-derived compounds HDO over these catalysts. In this study, we investigate the catalytic conversion of anisole, phenol and guaiacol to benzene over Ni 2 P/SiO 2 by probing the reaction conditions. The results show that a lower reaction temperature and higher H 2 pressure favour the hydrogenation of these model chemicals to cyclohexane, whereas a higher reaction temperature and lower H 2 pressure aid the generation of benzene. The cyclohexane and benzene yields are 89.8% and 96.0% at 1.5 MPa and 573 K and 0.5 MPa and 673 K, respectively. By eliminating the influence of internal and external diffusion, the low intrinsic activation energy of 58.2 kJ mol À1 is obtained, which explains the high catalytic activity. In addition, although guaiacol HDO has a low conversion due to the space steric effect of its substituents, it presents a similar reaction pathway to obtain anisole and phenol, which is dependent on reaction conditions. The long-run evaluation experiment shows that the activity and selectivity of anisole HDO to benzene changes slightly for 36 h.

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“…Lignin is generally thermally depolymerized to phenols, aromatic hydrocarbons, or aliphatic hydrocarbons during pyrolysis [8,9]. Catalytic pyrolysis is the other method used to deoxygenate pyrolysis biomass [10]. Unlike fast pyrolysis, catalytic pyrolysis can avoid unstable bio-oil secondary reactions during condensation and revaporization [1].…”

Section: Introductionmentioning

confidence: 99%

Two-step hydrogen transfer catalysis conversion of lignin to valuable small molecular compounds

Yan

2017

Green Processing and Synthesis

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Abstract:As the major composite of biomass, lignin can be utilized as feedstock for valuable chemicals, especially phenols. Catalysis hydrogenation of lignin is an attractive route for the conversion. However, most of them require hydrogen gas under high pressure which is dangerous. Hydrogen transfer reaction provides an alternative route to degrade and hydrogenate lignin or its units to small molecular compounds. Here, a two-step method has been employed using Raney Ni and Pd/C catalysts consecutively for hydrogen transfer catalysis for lignin. The results reveal that lignin can be degraded efficiently about 90% during conversion, and the major products are phenols with ~30% in yield. It provides a new green method for converting natural lignin to valuable chemicals.

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Hydrodeoxygenation processes: Advances on catalytic transformations of biomass-derived platform chemicals into hydrocarbon fuels

Cited by 307 publications

References 79 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

Highly selective hydrodeoxygenation of anisole, phenol and guaiacol to benzene over nickel phosphide

Two-step hydrogen transfer catalysis conversion of lignin to valuable small molecular compounds

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