Guaiacol transformation over unsupported molybdenum-based nitride catalysts

Ghampson, I. Tyrone; Sepúlveda, Catherine; Garcı́a, R.; Frederick, B.G.; Wheeler, M. Clayton; Escalona, N.; DeSisto, William J.

doi:10.1016/j.apcata.2011.10.050

Cited by 102 publications

(66 citation statements)

References 28 publications

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“…Reported systems for hydrodeoxygenation of lignin-derived monomer include those with conventional CoMoS and NiMoS catalysts under severe conditions (typically ≥573 K) [17][18][19][20][21]. Metal phosphate catalysts [22,23], metal carbide catalysts [24], molybdenum-based catalysts [24][25][26][27][28], vanadium [29], iron [8,30], nickel [31][32][33][34][35], copper [36], cobalt [37], rhenium [38], and various noble metal catalysts (Pd [30,39,40], Pt [41][42][43][44][45][46][47], Ru [48][49][50][51] and Rh [52,53]) have been also tested by a number of groups at a similar high reaction temperature or high hydrogen pressure. Because of the order of bond dissociation energy of the three bonds ((1) > (2) > (3)) [17,30,32] and the better accessibility of the bond (3), many reported systems are considered to dissociate the O CH 3 bond of guaiacol at first to give catechol (demethylation) [22,...…”

Section: Introductionmentioning

confidence: 99%

Demethoxylation of guaiacol and methoxybenzenes over carbon-supported Ru–Mn catalyst

Ishikawa

Tamura

Nakagawa

et al. 2016

Applied Catalysis B: Environmental

120

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Section: Introductionmentioning

confidence: 99%

Demethoxylation of guaiacol and methoxybenzenes over carbon-supported Ru–Mn catalyst

Ishikawa

Tamura

Nakagawa

et al. 2016

Applied Catalysis B: Environmental

120

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“…Currently, few researchers work on metal nitrides catalysts for bio-oil upgrading. Ghampson et al considered the effect of Mo 2 N on the conversion of guaiacol at 573 K and 50 bar hydrogen pressure in a batch reactor, finding that Mo 2 N was the most active compared to Mo 2 N 0.78 and other molybdenum compounds [107]. Moreover, the addition of cobalt produced higher yields of deoxygenated products than Mo 2 N due to the presence of Co 3 Mo 3 N particles.…”

Section: Non-noble Metal Catalystsmentioning

confidence: 99%

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

et al. 2017

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Abstract:Pyrolysis is considered the most promising way to convert biomass to fuels. Upgrading biomass pyrolysis oil is essential to produce high quality hydrocarbon fuels. Upgrading technologies have been developed for decades, and this review focuses on the hydrodeoxygenation (HDO). In order to declare the need for upgrading, properties of pyrolysis oil are firstly analyzed, and potential analysis methods including some novel methods are proposed. The high oxygen content of bio-oil leads to its undesirable properties, such as chemical instability and a strong tendency to re-polymerize. Acidity, low heating value, high viscosity and water content are not conductive to making bio-oils useful as fuels. Therefore, fast pyrolysis oils should be refined before producing deoxygenated products. After the analysis of pyrolysis oil, the HDO process is reviewed in detail. The HDO of model compounds including phenolics monomers, dimers, furans, carboxylic acids and carbohydrates is summarized to obtain sufficient information in understanding HDO reaction networks and mechanisms. Meanwhile, investigations of model compounds also make sense for screening and designing HDO catalysts. Then, we review the HDO of actual pyrolysis oil with different methods including two-stage treatment, co-feeding solvents and in-situ hydrogenation. The relative merits of each method are also expounded. Finally, HDO catalysts are reviewed in order of time. After the summarization of petroleum derived sulfured catalysts and noble metal catalysts, transitional metal carbide, nitride and phosphide materials are summarized as the new trend for their low cost and high stability. After major progress is reviewed, main problems are summarized and possible solutions are raised.

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“…This was attributed to the acid sites on the surface of the NiMo carbide catalysts [142]. Nitride (N) catalysts of Mo 2 N were evaluated for HDO of guaiacol in a batch autoclave at 300 • C and 5 MPa [143]. Mo 2 N catalyst prepared with flowing ammonia showed the highest activity for guaiacol conversion due to γ-Mo 2 N phase and high N/Mo atomic ratio present in the catalyst.…”

Section: Other Catalystsmentioning

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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Guaiacol transformation over unsupported molybdenum-based nitride catalysts

Cited by 102 publications

References 28 publications

Demethoxylation of guaiacol and methoxybenzenes over carbon-supported Ru–Mn catalyst

Demethoxylation of guaiacol and methoxybenzenes over carbon-supported Ru–Mn catalyst

An Overview on Catalytic Hydrodeoxygenation of Pyrolysis Oil and Its Model Compounds

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

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