Hydrodeoxygenation of guaiacol over carbon-supported molybdenum nitride catalysts: Effects of nitriding methods and support properties

Ghampson, I. Tyrone; Sepúlveda, Catherine; Garcı́a, R.; Radović, Ljubiša R.; Fierro, José Luis García; DeSisto, William J.; Escalona, N.

doi:10.1016/j.apcata.2012.06.047

Cited by 139 publications

(91 citation statements)

References 58 publications

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“…Demethylation (breaking of the O-methyl bond) to give catechol and subsequent deoxygenation leads to phenol formation, followed by CO hydrogenolysis and aromatic ring hydrogenation to give cyclohexene and cyclohexane. In our reactions the major products were phenol, catechol, cyclohexanone, cyclohexane, cyclohexene, which agrees with some studies reported in specialized literature (Ghampson et al, 2012).…”

Section: Hydrodeoxygenation Reaction Of Guaiacolsupporting

confidence: 82%

“…Bio-oils have a complex chemical composition. This is the reason why many authors have studied HDO reaction with model compounds including phenol (Zhang, Wang, Ma, Zhang, & Jiang, 2013), guaiacol (Ghampson et al, 2012) among others instead of studying bio-oils directly, in order to understand the basic chemical behavior. In HDO, high temperatures, high pressures of H 2, and the use of hydrogenation and deoxygenation catalysts are applied in order to generate compounds similar to hydrocarbons.…”

Section: Introductionmentioning

confidence: 99%

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HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

Ospina¹,

Buitrago‐Sierra²,

López³

2015

ing.inv.

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Physical and chemical activation methods were used to prepare two different activated carbons (ACs) from castor de-oiled cake. H 2 O/CO 2 mixture was used as the physical activating agent, and for chemical activation potassium carbonate (K 2 CO 3 ) was used. For both materials, textural and chemical properties were characterized by N 2 adsorption-desorption isotherms, thermogravimetric analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), thermal programmed reduction (TPR), X-ray fluorescence (XRF), and scanning electron microscopy (SEM). The ACs were used as supports for NiMo sulfide catalysts, which were prepared by wetness impregnation and in-situ sulfided for the hydrodeoxygenation (HDO) of guaiacol (GUA) as a model compound of bio-oil. The HDO reaction was carried out in a typical batch reactor at 5 MPa of H 2 and 350 °C. Under the same test conditions, commercial catalysts were also tested in the reaction. Although the commercial catalysts displayed higher GUA conversion, the prepared catalysts showed higher activity and non-oxygenated and saturated products yield.Keywords: Castor de-oiled cake, activated carbon, hydrodeoxygenation, bio-oils. RESUMENSe prepararon dos carbones activados a partir de la torta de higuerilla; como métodos para su obtención se usaron la activación física y la activación química. Para la activación física se usó una mezcla H 2 O/CO 2 como agente activante, y para la activación química, K 2 CO 3 . Las propiedades químicas y texturales de ambos carbones activados fueron caracterizados por isotermas de adsorción-desorción de N 2 , análisis termogravimétrico (TGA), espectroscopia infrarroja (FT-IR), reducción a temperatura programada (TPR), fluorescencia de rayos X (XRF) y microscopía electrónica de barrido (SEM). Los carbones activados se usaron como soporte en catalizadores NiMo sulfurados, los cuales fueron preparados por impregnación húmeda y reducidos in-situ para la reacción de hidrodesoxigenación del guaiacol (GUA), compuesto modelo de los aceites de pirólisis. La reacción de hidrodesoxigenación (HDO) se realizó en un reactor tipo batch a 5 MPa de H 2 y 350 °C. Con el fin de comparar, los catalizadores comerciales también se probaron en reacción. A pesar de que los catalizadores comerciales mostraron una mayor conversión de GUA, los catalizadores sintetizados exhibieron una mayor actividad y un mayor rendimiento en la producción de compuestos saturados y no oxigenados.Palabras clave: Torta de higuerilla, carbón activado, hidrodesoxigenación, bioaceites.

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Section: Hydrodeoxygenation Reaction Of Guaiacolsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

Ospina¹,

Buitrago‐Sierra²,

López³

2015

ing.inv.

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“…Guaiacol conversion routes are mainly determined by methoxy group, phenolic group, and the benzene ring [13,[37][38][39][40][41][42] Unauthenticated Download Date | 5/11/18 9:57 PM under the same reaction conditions. Catalysts prepared using N 2 /H 2 , have more highly dispersed Mo oxynitride than those prepared via ammonolysis, leading to a higher HDO activity.…”

Section: Guaiacols (Gua)mentioning

confidence: 99%

“…The transformation of GUA proceeds mostly through the direct demethoxylation route, bypassing the formation of catechol [42]. …”

Section: Guaiacols (Gua)mentioning

confidence: 99%

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

Wang

2012

Catalysis for Sustainable Energy

119

147

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“…In recent years, the catalytic behaviors of metals [5], nitrides [6] and sulfides [7,8,9,10,11,12,13] for the conversion of guaiacol have been studied. Bui et al [13] studied the effect of support of MoS 2 catalysts on the activity and selectivity of the HDO of guaiacol.…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF MO CONTENT IN MO(X)/γ-AL2O3 CATALYSTS OVER THE CONVERSION OF 2-METHOXYPHENOL AS LIGNIN-DERIVATES COMPONENTS

Leiva¹,

Sepúlveda²,

Garcı́a³

et al. 2013

J. Chil. Chem. Soc.

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The effect of Mo loading (10, 12, 15, 17 and 20 wt.%) on the physicochemical properties and reactivities of Mo(x)/g-Al 2 O 3 sulfide catalysts for the conversion of 2-methoxyphenol at 573 K and 5 MPa of hydrogen pressure were studied. The catalysts were characterized by specific area (S BET ), electrophoretic migration (EM), X-ray photoelectron spectroscopy (XPS) and surface acidity techniques. The highest conversion observed for the catalyst with a Mo loading of 15 wt.% was attributed to an increase in the number of active sites due to highly dispersed Mo species. At higher Mo loadings, the formation of Mo aggregates led to lower guaiacol conversion. The differences in the phenol/catechol ratio were explained by the acid strengths of the sulfided catalysts.

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Hydrodeoxygenation of guaiacol over carbon-supported molybdenum nitride catalysts: Effects of nitriding methods and support properties

Cited by 139 publications

References 58 publications

HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

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

EFFECT OF MO CONTENT IN MO(X)/γ-AL2O3 CATALYSTS OVER THE CONVERSION OF 2-METHOXYPHENOL AS LIGNIN-DERIVATES COMPONENTS

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Hydrodeoxygenation of guaiacol over carbon-supported molybdenum nitride catalysts: Effects of nitriding methods and support properties

Cited by 139 publications

References 58 publications

HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

HDO del guaiacol mediante el uso de catalizadores NiMo soportados sobre carbón activado obtenido a partir de la torta de higuerilla

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

EFFECT OF MO CONTENT IN MO(X)/&#947;-AL2O3 CATALYSTS OVER THE CONVERSION OF 2-METHOXYPHENOL AS LIGNIN-DERIVATES COMPONENTS

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EFFECT OF MO CONTENT IN MO(X)/γ-AL2O3 CATALYSTS OVER THE CONVERSION OF 2-METHOXYPHENOL AS LIGNIN-DERIVATES COMPONENTS