Hydrodeoxygenation of guaiacol as model compound for pyrolysis oil on transition metal phosphide hydroprocessing catalysts

Zhao, Haiyan; Li, D.; Bui, Phuong P.; Oyama, S. Ted

doi:10.1016/j.apcata.2010.07.039

Cited by 521 publications

(335 citation statements)

References 41 publications

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“…The average Ni 0 particle size corresponding to the obtained dispersion was 10.8 nm that was in good agreement with the average particle size obtained from the XRD result and the size of the Ni 0 particles observed on the TEM pictures. Earlier studies [14][15][16] used the CO chemisorptions method to determine the Ni 2 P dispersion of supported nickel phosphide catalysts. In the present study we attempted to use the H 2 chemisorption method to estimate the Ni 2 P dispersion of our catalysts.…”

Section: Xrd and H 2 -Tpr Resultsmentioning

confidence: 99%

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

Badari

Lónyi

Drotár

et al. 2015

Applied Catalysis B: Environmental

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Pyrolysis of animal by-products provides pyro-oil that contains about 10 wt% nitrogen mainly in aliphatic compounds and virtually no sulfur. The nitrogen should be removed from the oil preferably by hydrodenitrogenation (HDN) to obtain liquid fuel and ammonia. In order to understand the catalytic HDN processes of such bio-oils the HDN of propylamine (PA) was studied as model reaction over silica-supported Ni 2 P and Ni catalysts. Catalysts were prepared by H 2 -reduction of catalyst precursor NiO/phosphated silica gel and NiO/phosphated SBA-15 silica material and NiO/silica gel. The catalyst surface was characterized by Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) examination of adsorbed CO. It was shown that the Ni 2 P particles had a highly defected structure in the initial reduced state of the catalyst but were rapidly converted to ordered crystals in contact with PA under reaction conditions. The HDN reaction of PA was studied using a flow-through tube reactor

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Section: Xrd and H 2 -Tpr Resultsmentioning

confidence: 99%

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

Badari

Lónyi

Drotár

et al. 2015

Applied Catalysis B: Environmental

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“…Oyama et al 10 investigated the gas-phase HDO of guaiacol at 573 K under atmospheric H 2 using SiO 2 -supported metal phosphides (Ni 2 P, Fe 2 P, MoP, Co 2 P, WP) as catalysts. 97 Among the catalysts tested, Ni 2 P/SiO 2 showed the highest activity (80% conversion) to form benzene, phenol and anisole in 60%, 30% and 10% selectivities, …”

Section: Development Of Non-sulphided Hdo Catalystsmentioning

confidence: 99%

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

Kobayashi

Ohta

Fukuoka

2012

Catal. Sci. Technol.

191

121

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Conversion of lignocellulose into renewable chemicals and fuels has received great attention for building up the sustainable societies. However, the utilisation of lignocellulose in the chemical industry has almost been limited for paper manufacturing because of the complicated chemical structure and persistent property of lignocellulose. Heterogeneous catalysis has the potential to selectively convert lignocellulosic biomasses into various useful chemicals, and this methodology has rapidly progressed in the last several 10 years. In this perspective article, we outline our recent approaches on the heterogeneous catalysis for this challenging subject with related literatures. Lignocellulose as a renewable resourceConversion of biomass to renewable fuels and chemicals has attracted significant attention as a key technology for the 15 sustainable societies.1 Lignocellulose is the most abundant biomass resource, produced together with sugars and starch from carbon dioxide and water via the photosynthesis using sunlight and successive metabolism in plants. Lignocellulose is not digestible for human beings, which is an advantage over sugars 20 and starch since the use of edible carbohydrates for the synthesis of bioethanol fuel has competed with the food production, giving us a consensus that we should use non-food biomass as a feedstock to fuels and chemicals. Therefore, lignocellulose is one of the most attractive biomass resources in nature. 25Lignocellulose in woods consists of cellulose (40-50%), hemicellulose (20-40%) and lignin (20-30%).2 Cellulose is a water-insoluble polymer composed of glucose linked by -1,4-glycosidic bonds ( Fig. 1(a)) and forms robust crystal structures with inter-and intra-molecular hydrogen bonds, possessing high 30 chemical stability. 3 Hemicellulose is also a polysaccharide, but

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“…Moreover, alumina is known to be metastable in the presence of water, and will partially transform into boehmite under hydrothermal conditions [18]. To overcome these flaws, catalysts supported on SiO 2 [13,19], active carbon [20], TiO 2 [17], ZrO 2 [17,21,22], zeolites [23], and various mixed oxides [14,24] have been explored in recent years.…”

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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Hydrodeoxygenation of guaiacol as model compound for pyrolysis oil on transition metal phosphide hydroprocessing catalysts

Cited by 521 publications

References 41 publications

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

A study of the hydrodenitrogenation of propylamine over supported nickel phosphide catalysts using amorphous and nanostructured silica supports

Conversion of lignocellulose into renewable chemicals by heterogeneous catalysis

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

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