Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

Hellinger, Melanie; Baier, Sina; Mortensen, Peter Mølgaard; Kleist, Wolfgang; Jensen, Anker Degn; Grunwaldt, Jan‐Dierk

doi:10.3390/catal5031152

Cited by 31 publications

(26 citation statements)

References 37 publications

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“…Used Pt/H-MFI-90 catalysts with coke deposition were washed with ethanol and methanol, calcined in air at 400 • C for 10 h and reduced in a continuous hydrogen flow [103]. The regeneration experiments for HDO of guaiacol and 1-octanol showed that the catalytic conversion of guaiacol and 1-octanol over recovered Pt/H-MFI-90 catalysts was partly restored, and the recovered catalyst deactivated faster than the fresh catalyst.…”

Section: Catalyst Regeneration and Recycle 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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Section: Catalyst Regeneration and Recycle In Bio-oil Hdomentioning

confidence: 99%

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

et al. 2016

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“…Size distribution could not be determined due to the occlusion of Rh particles within the zeolite channels, resulting in a difficulty to distinguish the particles from the support with this technique. These results indicate that small and well‐dispersed Rh nanoparticles can be synthesized on the surface of zeolite …”

Section: Resultsmentioning

confidence: 98%

“…Unfortunately, the conversion of guaiacol under typical FCC conditions resulted in coke deposition, responsible for pore obstruction and zeolite catalytic site poisoning . The development of durable, regenerable, and highly active bifunctional catalysts, such as the ones described in this manuscript, would mitigate the deactivation pathways, avoiding the formation of condensates and extending the catalyst operation life without affecting the octane rating …”

Section: Introductionmentioning

confidence: 99%

Development of Bifunctional Hydrodeoxygenation Catalyst Rh‐HY for the Generation of Biomass‐Derived High‐Energy‐Density Fuels

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Sotelo

et al. 2019

Energy Tech

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Liquid‐phase hydrodeoxygenation (HDO) of phenol, anisole, and guaiacol over rhodium‐doped, high‐silica content zeolite catalysts (Si/Al = 15), HY, is investigated in a high‐pressure‐fixed bed reactor. These catalysts are characterized by inductively coupled plasma optical emission spectrometry, scanning electron microscopy with energy‐dispersive spectroscopy, thermogravimetric analysis, X‐ray diffraction, N2 physisorption, ammonia temperature‐programmed desorption, temperature‐programmed oxidation, temperature‐programmed reduction, 27Al magic angle spinning nuclear magnetic resonance, and X‐ray photoelectron spectroscopy. The effects of reaction temperature (150–250 °C) and weight hourly space velocity (WSHV = 1.0–2.8 h−1) on activity, stability, and product distribution are investigated. The main products obtained from HDO reactions are methylcyclopentane, cyclohexane, methylcyclohexane, and bicyclohexyl. Cyclohexanone is the most abundant oxygenated product along with deactivation. For all tested catalysts, increasing the reaction temperature up to 250 °C improves the HDO reactions without significant activity or selectivity loss. Higher rhodium loading extends the catalyst life and increases the activity and cyclohexane selectivity for the guaiacol feed. The experiments indicate that anisole, phenol, and guaiacol undergo aromatic hydrogenation on rhodium particles first, followed by deoxygenation on the acid sites over zeolite combined with additional hydrogenation.

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“…Additionally, high temperatures require more energy consumption and thus an increase in cost. Recently, much attention has been focused on the liquid phase hydrogenation of phenols [8,[17][18][19][20][21][22][23][24][25]. For example, Huang et al [26] prepared a high-performance PdRu bimetallic catalyst on mesoporous silica nanoparticles for the hydrogenation of phenol in CH 2 Cl 2 solvent.…”

Section: Introductionmentioning

confidence: 99%

High Efficient Hydrogenation of Lignin-Derived Monophenols to Cyclohexanols over Pd/γ-Al2O3 under Mild Conditions

Luo

et al. 2016

Catalysts

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Abstract:The catalytic hydrogenation of lignin-derived monophenols with high efficiency and selectivity is important for the sustainable production of chemicals and fuels. Here, Pd/γ-Al 2 O 3 was prepared via impregnation and used as catalyst for the hydrogenation of phenols to cyclohexanols under mild conditions in aqueous solution. 3 wt. % Pd/γ-Al 2 O 3 exhibited good catalytic activity for the selective hydrogenation of 4-ethylphenol into 4-ethylcyclohexanol, and a conversion of 100% with selectivity of 98.9% was achieved at 60˝C for 12 h. Other lignin-derived monophenolic model compounds such as 4-methyl phenol and 4-propyl phenol could be hydrogenated into cyclohexanols selectively under optimal conditions. Moreover, the Pd/γ-Al 2 O 3 catalyst displayed good activity for the hydrogenation of the mixture of monophenols directly derived from raw biomass system to cyclohexanols as the main products, and was favorable for the depolymerization of lignin oligomers under milder conditions. Pd/γ-Al 2 O 3 catalyst showed good water resistance and stability after recycling four times. This result might provide a promising approach to selectively producing cyclohexanol directly from raw biomass material under mild conditions in aqueous solutions.

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Continuous Catalytic Hydrodeoxygenation of Guaiacol over Pt/SiO2 and Pt/H-MFI-90

Cited by 31 publications

References 37 publications

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

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

Development of Bifunctional Hydrodeoxygenation Catalyst Rh‐HY for the Generation of Biomass‐Derived High‐Energy‐Density Fuels

High Efficient Hydrogenation of Lignin-Derived Monophenols to Cyclohexanols over Pd/γ-Al2O3 under Mild Conditions

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