Selective oxidation of ethane: Developing an orthorhombic phase in Mo–V–X (X=Nb, Sb, Te) mixed oxides

Botella, Pablo; Dejoz, Ana; Abello, M. Cristina; Vázquez, M.I.; Arrúa, Luis A.; Nieto, J.M. López

doi:10.1016/j.cattod.2008.09.016

Cited by 61 publications

(47 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is a versatile catalyst for several selective oxidation processes of C3 [17,19,[23][24][25][26] and C2 [27,28] feedstock. It works well as crystalline single phase.…”

Section: Introductionmentioning

confidence: 99%

Active Sites for Propane Oxidation: Some Generic Considerations

Schlögl

2011

Top Catal

View full text Add to dashboard Cite

Based on experimental observations about structure and dynamics of the reactive surface of the M1 phase some considerations are made about the nature and size of active sites. In analyzing the stoichiometry of the reactions following activation of propane it occurs that for dehydrogenation small sites are desirable being just sufficient to re-activate oxygen without kinetic hindrance. For deeper oxidation to acrylic acid (AA) the sites should be larger to accommodate all redox equivalents and oxygen species required for one transformation. A qualitative model for size and composition of the active site is made. It is likely that the active site consists on a VxOy species of strictly 2-D nature. This follows the structural suggestion for the active site on the a-b-plane of the M1 structure. The role of Te in moderating the active site is discussed. The suggestions are discussed in comparing requirements for oxidative dehydrogenation of propane (ODP) with those for AA synthesis.

show abstract

“…is a versatile catalyst for several selective oxidation processes of C3 [17,19,[23][24][25][26] and C2 [27,28] feedstock. It works well as crystalline single phase.…”

Section: Introductionmentioning

confidence: 99%

Active Sites for Propane Oxidation: Some Generic Considerations

Schlögl

2011

Top Catal

View full text Add to dashboard Cite

show abstract

“…In at least two studies the authors mention that the presence of steam is beneficial for the formation of acetic acid from ethane. [61,62] The complete absence of acetic acid in the product mixture in dry feed support the route for acetic acid formation via decomposition of acrylic acid in the presence of steam in the feed. Accordingly, it seems that acetic acid might be one major source of CO and CO 2 at higher conversion.…”

Section: Pathways To Products Of Deeper Oxidationmentioning

confidence: 99%

“…[53][54][55][56][57][58] In contrast, in studies investigating the partial oxidation of ethane over M1 catalysts, acetic acid was found not at all or only in trace amounts. [59][60][61][62] However, in these studies the oxidation of ethane was carried out only in absence of steam. In at least two studies the authors mention that the presence of steam is beneficial for the formation of acetic acid from ethane.…”

Section: Pathways To Products Of Deeper Oxidationmentioning

confidence: 99%

The reaction network in propane oxidation over phase-pure MoVTeNb M1 oxide catalysts

d’Alnoncourt¹,

Csepei²,

Hävecker³

et al. 2014

Journal of Catalysis

View full text Add to dashboard Cite

MoVTeNb oxide catalysts exclusively composed of the M1 phase (ICSD no. 55097) have been studied in the direct oxidation of propane to acrylic acid applying a broad range of reaction conditions with respect to temperature (623-633-643-653-663 Highlights• Phase purity and homogeneity ensure high stability of MoVTeNbO x in C 3 H 8 oxidation• The catalyst bears a self-supported active layer in sub-nanometer dimension• Higher O 2 content in the feed increases the activity without loss of selectivity• Oxygen partial pressure affects surface oxidation state and number of active sites• Auxiliary steam changes performance by modifying the nature of the active sites 5

show abstract

“…It was shown earlier [11,12,23] that the quaternary V-Mo-Nb-Te-O x catalysts demonstrated high activity and selectivity in low-temperature SOD of pure ethane exceeding dramatically those of three-and two-component mixed oxides. So, one of the goals of our study is to check the possibility of catalytic treatment of row initial mixture without preliminary deep purification using such quaternary catalyst.…”

Section: Introductionmentioning

confidence: 99%

“…V-Mo-Nb-Te-O x catalysts exceed noticeably other mixed oxides, such as NiO/MgO [8], Cr-V-O [9] or CeVO 4 [10], in both activity and selectivity of ethane SOD. The orthorhombic M 1 -phase (Te 2 M 20 O 57 ; M = Mo, V, and Nb) seems to play a key role in activation of ethane [11][12][13][14], propane [15][16][17] and butane [18] upon different alkanes SOD on V-Mo-Nb-Te-O x . Mixed oxides under study represent hybrid materials, which are known to be promising for many applications [19].…”

Section: Introductionmentioning

confidence: 99%

Effect of feedstock impurities on activity and selectivity of V-Mo-Nb-Te-Ox catalyst in ethane oxidative dehydrogenation

Финашина

Кучеров

Kustov

et al. 2017

Journal of Advanced Oxidation Technologies

View full text Add to dashboard Cite

Abstract:The effect of CH 4 , C 2 H 4 , CO 2 , CH 3 OH, and (CH 3 S) 2 on activity and selectivity of V-Mo-Nb-Te-O x catalyst for ethane oxidative dehydrogenation is studied. Methane acts as a chemically inert diluent of the gas mixture. Presence of ethylene in feed stream does not have significant effect on the rate of ethane dehydrogenation but causes slight drop in ethylene selectivity. CO 2 added is not involved in chemical transformations but suppress slightly ethane conversion and selectivity. Contamination of the gas stream with small amounts of either methanol or dimethyldisulfide (DMDS) does not reduce either activity or selectivity of the catalyst in ethane oxidative dehydrogenation.

show abstract

Selective oxidation of ethane: Developing an orthorhombic phase in Mo–V–X (X=Nb, Sb, Te) mixed oxides

Cited by 61 publications

References 40 publications

Active Sites for Propane Oxidation: Some Generic Considerations

Active Sites for Propane Oxidation: Some Generic Considerations

The reaction network in propane oxidation over phase-pure MoVTeNb M1 oxide catalysts

Effect of feedstock impurities on activity and selectivity of V-Mo-Nb-Te-Ox catalyst in ethane oxidative dehydrogenation

Contact Info

Product

Resources

About