Synergy effect in the HDO of phenol over Ni–W catalysts supported on active carbon: Effect of tungsten precursors

Echeandia, S; Arias, P.L.; Barrio, V.L.; Pawelec, B.; Fierro, J.L.G.

doi:10.1016/j.apcatb.2010.08.018

Cited by 189 publications

(108 citation statements)

References 33 publications

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“…Literature shows that conversion of compounds with alcohol and ether functional groups to hydrocarbons often involves a dehydration step followed by a hydrogenation step [34][35]. Therefore, HDO of phenolics involves sequential hydrogenation-dehydration-hydrogenation steps and the conversion of aryl alcohols and ethers to hydrocarbons follow this mechanism.…”

Section: Plausible Reaction Mechanisms For Lignin Conversionmentioning

confidence: 99%

“…Echeandia et al [34] found that during the HDO of phenol using Ni-based catalysts, the hydrogenation route through cyclohexanol was predominant over the route involving hydrogenolysis of C-O bonds. The preference for the hydrogenation route over hydrogenolysis may involve many factors including favourable reaction kinetics.…”

Section: Plausible Reaction Mechanisms For Lignin Conversionmentioning

confidence: 99%

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Influence of reaction conditions on the composition of liquid products from two-stage catalytic hydrothermal processing of lignin

Onwudili

2015

Bioresource Technology

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Section: Plausible Reaction Mechanisms For Lignin Conversionmentioning

confidence: 99%

Section: Plausible Reaction Mechanisms For Lignin Conversionmentioning

confidence: 99%

Influence of reaction conditions on the composition of liquid products from two-stage catalytic hydrothermal processing of lignin

Onwudili

2015

Bioresource Technology

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“…Using catalyst supports containing lower acidity and higher stability is an effective method to retard coke formation. Compared to acidic supports (Al 2 O 3 ), neutral activated carbon (AC) or silica (SiO 2 ) can be utilized as alternative catalyst supports [151]. The Lewis acidic sites on alumina-supported CoMo catalysts resulted in large coke formation during HDO reaction, while the HDO reaction over AC supported CoMo catalysts showed almost no coking reactions [152].…”

Section: Reducing Catalyst Deactivation In Bio-oil Hdomentioning

confidence: 99%

Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

et al. 2016

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Abstract:The massive consumption of fossil fuels and associated environmental issues are leading to an increased interest in alternative resources such as biofuels. The renewable biofuels can be upgraded from bio-oils that are derived from biomass pyrolysis. Catalytic cracking and hydrodeoxygenation (HDO) are two of the most promising bio-oil upgrading processes for biofuel production. Heterogeneous catalysts are essential for upgrading bio-oil into hydrocarbon biofuel. Although advances have been achieved, the deactivation and regeneration of catalysts still remains a challenge. This review focuses on the current progress and challenges of heterogeneous catalyst application, deactivation, and regeneration. The technologies of catalysts deactivation, reduction, and regeneration for improving catalyst activity and stability are discussed. Some suggestions for future research including catalyst mechanism, catalyst development, process integration, and biomass modification for the production of hydrocarbon biofuels are provided.

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“…We investigated the performances of our bifunctional platinum/ acid sites in the hydrodeoxygenation of oxygenated aromatics derived from the lignin fraction of biomass [72][73][74][75][76][77][78][79][80][81][82][83]. of acid sites close to metal nanoparticles has been shown to favor CAO bond cleavage and therefore deoxygenation.…”

Section: Metal-acid Bifunctional Catalysismentioning

confidence: 99%

Controlled deposition of titanium oxide overcoats by non-hydrolytic sol gel for improved catalyst selectivity and stability

Héroguel

Silvioli

et al. 2018

Journal of Catalysis

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a b s t r a c tAdvances in the synthetic control of surface nanostructures could improve the activity, selectivity and stability of heterogeneous catalysts. Here, we present a technique for the controlled deposition of TiO 2 overcoats based on non-hydrolytic sol-gel chemistry. Continuous injection of Ti( i PrO) 4 and TiCl 4 mixtures led to the formation of conformal TiO 2 overcoats with a growth rate of 0.4 nm/injected monolayer on several materials including high surface area SBA-15. Deposition of TiO 2 on SBA-15 generated mediumstrength Lewis acid sites, which catalyzed 1-phenylethanol dehydration at high selectivities and decreased deactivation rates compared to typically used HZSM-5. When supported metal nanoparticles were similarly overcoated, the intimate contact between the metal and acid sites at the supportovercoat interface significantly increased propylcyclohexane selectivity during the deoxygenation of lignin-derived propyl guaiacol (89% at 90% conversion compared to 30% for the uncoated catalyst). For both materials, the surface reactivity could be tuned with the overcoat thickness.

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Synergy effect in the HDO of phenol over Ni–W catalysts supported on active carbon: Effect of tungsten precursors

Cited by 189 publications

References 33 publications

Influence of reaction conditions on the composition of liquid products from two-stage catalytic hydrothermal processing of lignin

Influence of reaction conditions on the composition of liquid products from two-stage catalytic hydrothermal processing of lignin

Application, Deactivation, and Regeneration of Heterogeneous Catalysts in Bio-Oil Upgrading

Controlled deposition of titanium oxide overcoats by non-hydrolytic sol gel for improved catalyst selectivity and stability

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