Characterization and reactivity of molybdenum oxide catalysts supported on zirconia

Bhaskar, Thallada; Reddy, Kondakindi Rajender; Kumar, Chinthala Praveen; Murthy, Mamidanna R.V.S.; Chary, Komandur V. R.

doi:10.1016/s0926-860x(00)00874-7

Cited by 73 publications

(44 citation statements)

References 41 publications

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“…Bhaskar et al [45] identified two peaks of reduction of bulk MoO 3 at 767 and 997°C. The sharp peak at 767°C corresponds to the reduction of MoO 3 (MoO 3 ?…”

Section: Upon Catalyst Characterizationsmentioning

confidence: 99%

In Situ and Simultaneous Synthesis of a Novel Graphene-Based Catalyst for Deep Hydrodesulfurization of Naphtha

Hajjar

Kazemeini

Rashidi³

et al. 2015

Catal Lett

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In this research, a novel graphene-supported catalyst was prepared through which, a simultaneous chemical exfoliation of graphite and MoS 2 powder performed preparing a new composite species and evaluated for the hydrodesulfurization reaction of naphtha and no sulfidation pretreatment was performed upon the catalyst. Also, the influences of the operating parameters such as temperature, and liquid hourly space velocity on HDS conversion evaluated.Electronic supplementary material The online version of this article (

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“…Bhaskar et al [45] identified two peaks of reduction of bulk MoO 3 at 767 and 997°C. The sharp peak at 767°C corresponds to the reduction of MoO 3 (MoO 3 ?…”

Section: Upon Catalyst Characterizationsmentioning

confidence: 99%

In Situ and Simultaneous Synthesis of a Novel Graphene-Based Catalyst for Deep Hydrodesulfurization of Naphtha

Hajjar

Kazemeini

Rashidi³

et al. 2015

Catal Lett

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“…The second metal oxide, as well as the method of preparation, can produce a zirconia-based catalyst with different chemical, physical, and catalytic properties. Previous work has shown that the incorporation of molybdenum with zirconia through co-precipitation yields mixed oxides that have a higher surface area and are more easily reduced [6][7][8], leading to higher catalytic activity. In addition, iridium has been shown to have high activity specifically for catalytic ring opening.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Evaluation of Methylcyclopentane and Cyclohexane Ring Opening over Ir/ZrO2–MoO3 Catalysts

Wang

Nelson

2008

Catal Lett

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A series of Ir/ZrO 2 -MoO 3 catalysts with different molybdenum concentrations and iridium loadings were synthesized and studied for ring opening of methylcyclopentane and cyclohexane to n-hexane. X-ray photoelectron spectroscopy (XPS) indicated that molybdenum and zirconium were present mainly in the form of MoO 3 and ZrO 2 , respectively, and temperature programmed desorption (TPD) indicated the acidity was strongly correlated to the MoO 3 content. Iridium was incorporated by wet impregnation to a desired loading of 30 and 300 ppmw with the concentration verified by instrumental neutron activation analysis (INAA). The vapor phase conversion of methylcyclopentane and the liquid phase conversion of cyclohexane were subsequently studied to determine catalytic activity and selectivity. The Ir/ZrO 2 -MoO 3 catalyst with 3.5 at.% molybdenum and 30 ppmw iridium produced an overall relatively high activity and selectivity for the conversion of cyclohexane to n-hexane.

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“…The TPR profile of pure MoO 3 shows two major peaks, at 765 and 894°C. Recently, Bhaskar et al (2001) identified two peaks of reduction of bulk MoO 3 , at 767 and 997°C and a minor one at 797°C. The sharp peak at 767°C corresponds to the reduction of MoO 3 (MoO 3 → MoO 2 ) and the peak at 997°C is associated with the reduction of MoO 2 (MoO 2 → Mo).…”

Section: Resultsmentioning

confidence: 99%

Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition

Paiva

Monteiro

Zacharias

et al. 2006

Braz. J. Chem. Eng.

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-The influence of molybdenum oxide as a promoter on the V 2 O 5 /Nb 2 O 5 system was investigated. A series of MoO 3 /V 2 O 5 /Nb 2 O 5 catalysts, with MoO 3 loading ranging from 1 to 3 wt% MoO 3 and fixed V 2 O 5 content (21 wt%), were prepared by impregnation of the Nb 2 O 5 support with an aqueous solution of ammonium metavanadate and ammonium molybdate. The acid-base properties of the catalysts were investigated to determine of the selectivity of the isopropanol decomposition reaction. The X-ray diffraction results showed the presence of the β-(Nb,V) 2 O 5 phase. The temperature-programmed reduction profiles showed that the reducibility of vanadium was affected by the presence of molybdenum oxide. Activity results for isopropanol decomposition revealed that the acid-base properties of V 2 O 5 /Nb 2 O 5 catalysts are affected upon incorporation of MoO 3 , specifically for loadings of 3 wt %. For this catalyst composition both propylene and acetone formation rates decreased.

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Characterization and reactivity of molybdenum oxide catalysts supported on zirconia

Cited by 73 publications

References 41 publications

In Situ and Simultaneous Synthesis of a Novel Graphene-Based Catalyst for Deep Hydrodesulfurization of Naphtha

In Situ and Simultaneous Synthesis of a Novel Graphene-Based Catalyst for Deep Hydrodesulfurization of Naphtha

Characterization and Evaluation of Methylcyclopentane and Cyclohexane Ring Opening over Ir/ZrO2–MoO3 Catalysts

Characterization and catalytic behavior of MoO3/V2O5/Nb2 O5 systems in isopropanol decomposition

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