Hydrodeoxygenation of m-cresol with Pt supported over mild acid materials

Zanuttini, María Soledad; Costa, B.O. Dalla; Querini, C.A.; Peralta, Marcela

doi:10.1016/j.apcata.2014.06.015

Cited by 79 publications

(56 citation statements)

References 46 publications

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“…Regeneration of Pt/γ-Al 2 O 3 , Pt/SiO 2 , and Pt/Na-B catalysts was conducted in air at 350 • C for m-cresol HDO. The recovered catalysts obtained the same activity and selectivity toward toluene in the second cycle compared to the first cycle [149]. This was due to the recovered metallic sites and a high fraction of acid sites in the regenerated catalysts.…”

Section: Catalyst Regeneration and Recycle In Bio-oil Hdosupporting

confidence: 53%

“…Alumina acidic support was deactivated faster than inert supports such as SiO 2 due to its relatively high acidity and strong interaction with the coke precursors [117,148]. A high density of Brønsted acid sites resulted in condensation of precursors adsorbed on adjacent sites and faster coke formation [149]. Acidity of the catalyst is also necessary for catalyst activity.…”

Section: Catalyst Deactivation In Bio-oil Hdomentioning

confidence: 99%

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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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Section: Catalyst Regeneration and Recycle In Bio-oil Hdosupporting

confidence: 53%

Section: 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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“…Meanwhile, it is proposed that Lewis acid sites bind reactant species adsorb to catalyst surface, and Brønsted acid sites supply protons to form carbocations as coke precursors [114]. Zanuttini et al confirmed that Pt/SiO 2 had higher carbon deposition in the HDO of m-cresol compared to Pt/Al 2 O 3 due to the presence of Brønsted acid sites on silica supported catalyst, while alumina catalyst only had Lewis acid sites [117]. Therefore, the contribution of the Lewis and Brønsted acidic sites to coke formation is still debatable.…”

Section: Catalyst Deactivationmentioning

confidence: 78%

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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“…Keane (1998, 2000) reported that benzene started to form when the temperature was higher than 250 1C for vapor phase conversion of the phenol/ methanol mixture. While at 300 1C and atmospheric pressure, hydrodeoxygenation of cresol on the Ni and Pt catalysts produces mainly methylcyclohexanone, methylcyclohexanol, and toluene (Foster et al, 2012, Nie et al, 2014a, 2014bZanuttini et al, 2014). However, it is difficult to directly compare these results due to variation in reaction conditions.…”

Section: Introductionmentioning

confidence: 97%

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

Chen

Yang

et al. 2015

Chemical Engineering Science

103

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Hydrodeoxygenation of m-cresol with Pt supported over mild acid materials

Cited by 79 publications

References 46 publications

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

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

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

Vapor phase hydrodeoxygenation and hydrogenation of m-cresol on silica supported Ni, Pd and Pt catalysts

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