Propane Oxidation on Mo–V–Sb–Nb Mixed-Oxide Catalysts1. Kinetic and Mechanistic Studies

Novakova, Ekaterina K.; Védrine, J.C.; Derouane, Éric G.

doi:10.1016/s0021-9517(02)93704-8

Cited by 20 publications

(12 citation statements)

References 19 publications

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“…Naumann d'Alnoncourt et al investigated the propane oxidation over MoVTeNbO x in the M1 structure. As found before by Novakova et al [6] steam is beneficial for acrylic acid production. The apparent activation energy was found to depend on the feed composition [12].…”

Section: Kinetic Methods Model-free Kinetic Datasupporting

confidence: 59%

“…The order of CO 2 and CO formation with respect to oxygen is 1.1 and 0.8, respectively. Acrylic acid was found to be first order in propane and close to one half in oxygen [6].…”

Section: Mechanismsmentioning

confidence: 93%

“…Novakova et al [6] determined apparent kinetic orders for propane disappearance, first order with respect to propane, 0.26 with respect to oxygen. The formation rate of propene is first order with respect to propane and 0.26 order with respect to oxygen.…”

Section: Kinetic Methods Model-free Kinetic Datamentioning

confidence: 99%

“…A more comprehensive mechanism including acetic acid and propionic acid was presented by Novakova et al [6]. Their investigations were performed over a Mo-V-Sb-Nb oxide catalyst.…”

Section: Mechanismsmentioning

confidence: 99%

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Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

et al. 2018

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This research presents a kinetic investigation of the selective oxidation of propane to acrylic acid over a MoVTeNb oxide (M1 phase) catalyst. The paper contains both an overview of the related literature, and original results with a focus on kinetic aspects. Two types of kinetic experiments were performed in a plug flow reactor, observing (i) steady-state conditions (partial pressure variations) and (ii) the catalyst evolution as a function of time-on-stream. For this, the catalyst was treated in reducing atmosphere, before re-oxidising it. These observations in long term behaviour were used to distinguish different catalytic routes, namely for the formation of propene, acetic acid, acrylic acid, carbon monoxide and carbon dioxide. A partial carbon balance was introduced, which is a 'kinetic fingerprint', that distinguishes one type of active site from another. Furthermore, an 'active site' was found to consist of one or more 'active centres'. A rational mechanism was developed based on the theory of graphs and includes two time scales belonging to (i) the catalytic cycle and (ii) the catalyst evolution. Several different types of active sites exist, at least as many, as kinetically independent product molecules are formed over a catalyst surface.

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Section: Kinetic Methods Model-free Kinetic Datasupporting

confidence: 59%

“…The order of CO 2 and CO formation with respect to oxygen is 1.1 and 0.8, respectively. Acrylic acid was found to be first order in propane and close to one half in oxygen [6].…”

Section: Mechanismsmentioning

confidence: 93%

Section: Kinetic Methods Model-free Kinetic Datamentioning

confidence: 99%

“…A more comprehensive mechanism including acetic acid and propionic acid was presented by Novakova et al [6]. Their investigations were performed over a Mo-V-Sb-Nb oxide catalyst.…”

Section: Mechanismsmentioning

confidence: 99%

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Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

et al. 2018

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“…A further increase in temperature from 600 to 750°C caused a decrease in the selectivity. It is well known from unsupported MoVTeNb-based catalysts that particular calcination temperatures have a crucial influence on phase composition and reduction degree of metal ions, which are related to the catalytic performance [19][20][21][22][23][24][25]. Among the mixed MoVTeNbO system catalysts prepared under different calcination temperatures, it shows the highest propane conversion and acrylic acid selectivity at 600°C.…”

Section: 1the Influence Of the Calcination Temperature On Catalytimentioning

confidence: 99%

Effect of Preparation Condition on the Performance of MoVTeNbO Catalyst Materials for Selective Oxidation of Propane into Acrylic Acid

Zheng¹,

Yu²,

Zhang³

et al. 2008

TOMSJ

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Abstract:The effects of chemical composition and preparation conditions, especially calcination atmosphere, water content and oxygen content on the catalytic performances of MoVTeNbO mixed oxide catalyst system for the selective oxidation of propane to acrylic acid have been investigated and discussed. Among the catalysts studied, the Mo 1.0 V 0.3 Te 0.23 Nb 0.12 O catalyst calcined in inert atmosphere under a temperature of 600°C showed the best performance in terms of propane conversion and selectivity to acrylic acid. The results revealed that proper chemical composition, calcination atmosphere, water content and oxygen content affected greatly the catalysts in many ways including structure, chemical composition, which are related to their catalytic performances, the 78% propane conversion and 61% one-pass yield to acrylic acid can be achieved at the same time.

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The Low‐Temperature Oxidation of Propane by using H₂O₂ and Fe/ZSM‐5 Catalysts: Insights into the Active Site and Enhancement of Catalytic Turnover Frequencies

et al. 2017

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Fe‐containing ZSM‐5 catalysts are reported to be efficient catalysts for the partial oxidation of propane to oxygenated products at reaction temperatures as low as 50 °C in an aqueous phase reaction when using the green oxidant H2O2. It was previously proposed that extra framework Fe species at the exchange sites of the zeolite are responsible for activation of both the alkane and hydrogen peroxide. Through a systematic study of the influence of framework topology and exchange properties, it is now shown that this high catalytic activity is specific to the MFI‐type Brønsted acidic zeolite ZSM‐5. Furthermore, through a simple aqueous acid washing treatment, leaching of approximately 77 % of iron present within a Fe/ZSM‐5 catalyst only caused the relative propane conversion to decrease by 17 %; implying that most of the initially loaded Fe does not actually contribute to the catalytic activity. This small change in conversion after ‘excess’ Fe removal, amounts to a three‐fold increase in turnover frequency (TOF) (Fe) from 66 h−1 to 232 h−1 compared with the parent Fe/ZSM‐5 catalyst. By comparing these samples, it is shown by NH3 temperature‐programmed desorption, 27Al magic angle spinning NMR spectroscopy, X‐ray photoelectron spectroscopy and TEM analysis that surface iron oxide species are effectively spectators in the oxidation of propane with H2O2. This provides further insight as to the location and true nature of the catalytically active Fe species.

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Propane Oxidation on Mo–V–Sb–Nb Mixed-Oxide Catalysts1. Kinetic and Mechanistic Studies

Cited by 20 publications

References 19 publications

Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

Effect of Preparation Condition on the Performance of MoVTeNbO Catalyst Materials for Selective Oxidation of Propane into Acrylic Acid

The Low‐Temperature Oxidation of Propane by using H₂O₂ and Fe/ZSM‐5 Catalysts: Insights into the Active Site and Enhancement of Catalytic Turnover Frequencies

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Propane Oxidation on Mo–V–Sb–Nb Mixed-Oxide Catalysts1. Kinetic and Mechanistic Studies

Cited by 20 publications

References 19 publications

Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

Constructing A Rational Kinetic Model of the Selective Propane Oxidation Over A Mixed Metal Oxide Catalyst

Effect of Preparation Condition on the Performance of MoVTeNbO Catalyst Materials for Selective Oxidation of Propane into Acrylic Acid

The Low‐Temperature Oxidation of Propane by using H2O2 and Fe/ZSM‐5 Catalysts: Insights into the Active Site and Enhancement of Catalytic Turnover Frequencies

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The Low‐Temperature Oxidation of Propane by using H₂O₂ and Fe/ZSM‐5 Catalysts: Insights into the Active Site and Enhancement of Catalytic Turnover Frequencies