Hydrodeoxygenation of guaiacol on noble metal catalysts

“…However, at the moment the refineries are not willing to adopt coprocessing, because of the observed diminution of the HDS activity [8]. Thus, in recent years the research has turned to the respective reduced or partially reduced catalysts [9][10][11][12][13], to transition metal catalysts [14] as well as to noble metal carbon [7] or zirconia [15] based catalysts. In a recent review article Mortensen et al [16] concluded that both sulfur containing type catalysts and noble metal type catalysts are quite promising, but these systems still need additional development in order to evaluate their full potential.…”

Section: Introductionmentioning

confidence: 99%

Hydrodeoxygenation of Phenol Over Hydrotreatment Catalysts in their Reduced and Sulfided States

Platanitis¹,

Panagiotou²,

Bourikas³

et al. 2014

TOCATJ

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Abstract:The influence of the composition of reduced CoMo, NiMo and NiW catalysts on the catalytic performance in hydrodeoxygenation (HDO) of phenol has been investigated. γ-Al 2 O 3 and TiO 2 were used as supports. Different activity orders were obtained over γ-Al 2 O 3 and TiO 2 supported catalysts reflecting the critical role of the support. NiMo catalyst supported on γ-alumina proved to be the most active followed by the CoMo catalyst supported on titania. CoMo and NiMo lab made catalysts were proved to be more active compared to a reduced industrial CoMo catalyst supported on γ-alumina. An increase of phenol conversion in the range 52-230% was obtained at 350°C.A series of CoMo, NiMo and NiW catalysts supported on TiO 2 was also prepared using the "Equilibrium -DepositionFiltration" (EDF) method. The application of this technique, instead of the classical impregnation, increased considerably the activity of the CoMo catalyst supported on titania (48% increase of phenol conversion at 350°C).The most active lab catalysts (wet impregnated NiMo catalyst supported on alumina, EDF CoMo catalyst supported on titania) and the industrial CoMo catalyst were evaluated after sulfidation for simultaneous HDO of phenol and HDS of dibenzothiophene. These catalysts exhibited comparable HDO activities while the first one proved to be superior in HDS. Overall, taking into account the significantly higher loading of the industrial catalyst in the supported elements compared to the lab made catalysts, the latter seems to be quite promising, even in the frame of a co-processing strategy.

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“…Considerable increase in PAHs content was obtained only for HY. The conversion of oxygenates to aromatics over acid sites of zeolite-based catalysts is a well-known phenomenon; xylan, which is a thermally unstable fibrin linking cellulose and lignin, is easily decomposed on the acid sites and converted to aromatics through decarbonylation and aromatization [13,14].…”

Section: Resultsmentioning

confidence: 99%

Catalytic Pyrolysis of Wild Reed over a Zeolite-Based Waste Catalyst

Yoo

Park

et al. 2016

Energies

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Fast catalytic pyrolysis of wild reed was carried out at 500˝C. Waste fluidized catalytic cracking (FCC) catalyst disposed from a petroleum refinery process was activated through acetone-washing and calcination and used as catalyst for pyrolysis. In order to evaluate the catalytic activity of waste FCC catalyst, commercial HY zeolite catalyst with a SiO 2 /Al 2 O 3 ratio of 5.1 was also used. The bio-oil produced from pyrolysis was analyzed using gas chromatography/mass spectrometry (GC/MS). When the biomass-to-catalyst ratio was 1:1, the production of phenolics and aromatics was promoted considerably by catalysis, whereas the content of oxygenates was affected little. Significant conversion of oxygenates to furans and aromatics was observed when the biomass-to-catalyst ratio of 1:10 was used. Activated waste FCC catalyst showed comparable catalytic activity for biomass pyrolysis to HY in terms of the promotion of valuable chemicals, such as furans, phenolics and aromatics. The results of this study imply that waste FCC catalyst can be an important economical resource for producing high-value-added chemicals from biomass.

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Hydrodeoxygenation of guaiacol on noble metal catalysts

Cited by 499 publications

References 27 publications

Hydrodeoxygenation of model compounds and catalytic systems for pyrolysis bio-oils upgrading

Hydrodeoxygenation of model compounds and catalytic systems for pyrolysis bio-oils upgrading

Hydrodeoxygenation of Phenol Over Hydrotreatment Catalysts in their Reduced and Sulfided States

Catalytic Pyrolysis of Wild Reed over a Zeolite-Based Waste Catalyst

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