MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA: ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION

Gheorghita Mitran; Roba Saab; Nikolaos Charisiou; Kyriaki Polychronopoulou; Maria Goula

doi:10.1016/j.mcat.2020.111159

MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA: ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION

Gheorghita Mitran, Roba Saab, Nikolaos Charisiou, Kyriaki Polychronopoulou, Maria Goula

Mechanical & Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

For the work presented herein, molybdenum oxides supported on carbon coated alumina, were synthesized by precipitation of support and its impregnation with an aqueous solution of sucrose and ammonium molybdate. The effect of molybdenum content on the physico-chemical characteristics was investigated. The conversion of n-butanol depends on the concentration of acidic sites with medium and strong strength. The selectivity to 4-heptanone can be related to a good dispersion of molybdenum oxides (representing the active sites) on the surface. An increase in the size of the crystallites, evidenced by XRD, and the presence of phases corresponding to MoO_xC_y mixed oxides, leads to an increase in selectivity to butyraldehyde. The 10% molybdenum content represents the optimum value for the best conversion of n-butanol, at the same time obtaining the catalyst with the highest number of acid sites with strong strength.

Original language	British English
Article number	111159
Journal	Molecular Catalysis
Volume	495
DOIs	https://doi.org/10.1016/j.mcat.2020.111159
State	Published - Nov 2020

Keywords

4-heptanone
butanol ketonization
butyraldehyde
carbon covered alumina
molybdenum oxides

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title = "MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA: ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION",

abstract = "For the work presented herein, molybdenum oxides supported on carbon coated alumina, were synthesized by precipitation of support and its impregnation with an aqueous solution of sucrose and ammonium molybdate. The effect of molybdenum content on the physico-chemical characteristics was investigated. The conversion of n-butanol depends on the concentration of acidic sites with medium and strong strength. The selectivity to 4-heptanone can be related to a good dispersion of molybdenum oxides (representing the active sites) on the surface. An increase in the size of the crystallites, evidenced by XRD, and the presence of phases corresponding to MoOxCy mixed oxides, leads to an increase in selectivity to butyraldehyde. The 10% molybdenum content represents the optimum value for the best conversion of n-butanol, at the same time obtaining the catalyst with the highest number of acid sites with strong strength.",

keywords = "4-heptanone, butanol ketonization, butyraldehyde, carbon covered alumina, molybdenum oxides",

author = "Gheorghita Mitran and Roba Saab and Nikolaos Charisiou and Kyriaki Polychronopoulou and Maria Goula",

note = "Funding Information: KP would like to acknowledge the support from Khalifa University through the RCII-2018-024 Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = nov,

doi = "10.1016/j.mcat.2020.111159",

language = "British English",

volume = "495",

journal = "Molecular Catalysis",

issn = "2468-8231",

publisher = "Elsevier BV",

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T1 - MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA

T2 - ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION

AU - Mitran, Gheorghita

AU - Saab, Roba

AU - Charisiou, Nikolaos

AU - Polychronopoulou, Kyriaki

AU - Goula, Maria

PY - 2020/11

Y1 - 2020/11

N2 - For the work presented herein, molybdenum oxides supported on carbon coated alumina, were synthesized by precipitation of support and its impregnation with an aqueous solution of sucrose and ammonium molybdate. The effect of molybdenum content on the physico-chemical characteristics was investigated. The conversion of n-butanol depends on the concentration of acidic sites with medium and strong strength. The selectivity to 4-heptanone can be related to a good dispersion of molybdenum oxides (representing the active sites) on the surface. An increase in the size of the crystallites, evidenced by XRD, and the presence of phases corresponding to MoOxCy mixed oxides, leads to an increase in selectivity to butyraldehyde. The 10% molybdenum content represents the optimum value for the best conversion of n-butanol, at the same time obtaining the catalyst with the highest number of acid sites with strong strength.

AB - For the work presented herein, molybdenum oxides supported on carbon coated alumina, were synthesized by precipitation of support and its impregnation with an aqueous solution of sucrose and ammonium molybdate. The effect of molybdenum content on the physico-chemical characteristics was investigated. The conversion of n-butanol depends on the concentration of acidic sites with medium and strong strength. The selectivity to 4-heptanone can be related to a good dispersion of molybdenum oxides (representing the active sites) on the surface. An increase in the size of the crystallites, evidenced by XRD, and the presence of phases corresponding to MoOxCy mixed oxides, leads to an increase in selectivity to butyraldehyde. The 10% molybdenum content represents the optimum value for the best conversion of n-butanol, at the same time obtaining the catalyst with the highest number of acid sites with strong strength.

KW - 4-heptanone

KW - butanol ketonization

KW - butyraldehyde

KW - carbon covered alumina

KW - molybdenum oxides

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U2 - 10.1016/j.mcat.2020.111159

DO - 10.1016/j.mcat.2020.111159

M3 - Article

AN - SCOPUS:85089134664

SN - 2468-8231

VL - 495

JO - Molecular Catalysis

JF - Molecular Catalysis

M1 - 111159

ER -

MOLYBDENUM SUPPORTED ON CARBON COVERED ALUMINA: ACTIVE SITES FOR n-BUTANOL DEHYDROGENATION AND KETONIZATION

Abstract

Keywords

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