Kinetics and mechanism of partial oxidation of ethane to ethylene and acetic acid over MoV type catalysts

Rahman, Faizur; Loughlin, Kevin F.; Al-Saleh, M.A.; Saeed, M.R.; Tukur, Nasiru M.; Hossain, Mohammad M.; Karim, Khalid; Mamedov, A. Sh.

doi:10.1016/j.apcata.2009.11.026

Cited by 53 publications

(40 citation statements)

References 20 publications

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“…We were not able to fit our experimental results with the model of Rahman et al [9]. Thus, the model needs modifications for our case since we are using a different catalyst.…”

Section: Discussionmentioning

confidence: 46%

“…The kinetics of MoV type catalyst was re-investigated by Rahman et al [9] but the catalyst composition was not mentioned. Most probably it contains Nb and Pd.…”

Section: Introductionmentioning

confidence: 99%

“…5. The strong acceleration of the rate of the ethylene oxidation to acetic acid by the presence of water (Linke et al [7,8]; Rahman et al [9]). Water, whether formed as a byproduct or added with C 2 H 6 -O 2 reactants, increases acetic acid selectivity by promoting the desorption of adsorbed acetate species as acetic acid.…”

Section: Introductionmentioning

confidence: 99%

“…Most probably it contains Nb and Pd. Rahman et al [9] developed a two-site Eley-Rideal-Redox (ERR) model to predict the partial oxidation of ethane to ethylene and the partial ethane oxidation to acetic acid over the catalyst. To be used in acetic acid plant design, we need to know how much CO is produced.…”

Section: Introductionmentioning

confidence: 99%

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Reaction kinetics of ethane partial oxidation to acetic acid

et al. 2018

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The partial oxidation of ethane to ethylene and acetic acid on supported MoVNbPd/TiO 2 (P25 of Degussa) has been investigated. Pd was added in a nano-metallic form. The catalyst composition was also different from similar studied catalysts. This results in a better selectivity towards acetic acid formation. The reaction was carried out in a tubular reactor at temperature range 225-275 °C, total pressure range 0-200 psig and oxygen percentage in the feed gas of 10-40%. The feed gas contains ethane and oxygen. In this work, we develop a kinetic model for the reaction for the developed catalyst. In this model, we assume that oxidation reactions take place on different sites; ethane oxidation takes place on one site, ethylene oxidation on another site, and CO is oxidized to CO 2 on a third site. The model exhibits good agreement with the experimental data.

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“…We were not able to fit our experimental results with the model of Rahman et al [9]. Thus, the model needs modifications for our case since we are using a different catalyst.…”

Section: Discussionmentioning

confidence: 46%

“…The kinetics of MoV type catalyst was re-investigated by Rahman et al [9] but the catalyst composition was not mentioned. Most probably it contains Nb and Pd.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reaction kinetics of ethane partial oxidation to acetic acid

et al. 2018

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“…MoVNb-O catalyst family thus appears as the most promising possibility at present for ethane to ethylene and acetic acid, the problem being that both products are formed, and limiting acetic acid formation, if desired, is difficult. However, when adding Pd, the selectivity to acid acetic may reach 80% [98,99], and even more when adding water in the feed [100]. The same effect holds true for propane oxidative dehydrogenation by Pt-H 3 PMo 12 O 40 [101] with O 2 and H 2 and for propane ammoxidation to acrylonitrile.…”

Section: Case Of Ethanementioning

confidence: 69%

Heterogeneous Partial (amm)Oxidation and Oxidative Dehydrogenation Catalysis on Mixed Metal Oxides

Védrine

2016

Catalysts

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This paper presents an overview of heterogeneous partial (amm)oxidation and oxidative dehydrogenation (ODH) of hydrocarbons. The review has been voluntarily restricted to metal oxide-type catalysts, as the partial oxidation field is very broad and the number of catalysts is quite high. The main factors of solid catalysts for such reactions, designated by Grasselli as the "seven pillars", and playing a determining role in catalytic properties, are considered to be, namely: isolation of active sites (known to be composed of ensembles of atoms), Me-O bond strength, crystalline structure, redox features, phase cooperation, multi-functionality and the nature of the surface oxygen species. Other important features and physical and chemical properties of solid catalysts, more or less related to the seven pillars, are also emphasized, including reaction sensitivity to metal oxide structure, epitaxial contact between an active phase and a second phase or its support, synergy effect between several phases, acid-base aspects, electron transfer ability, catalyst preparation and activation and reaction atmospheres, etc. Some examples are presented to illustrate the importance of these key factors. They include light alkanes (C 1 -C 4 ) oxidation, ethane oxidation to ethylene and acetic acid on MoVTe(Sb)Nb-O and Nb doped NiO, propene oxidation to acrolein on BiMoCoFe-O systems, propane (amm)oxidation to (acrylonitrile) acrylic acid on MoVTe(Sb)Nb-O mixed oxides, butane oxidation to maleic anhydride on VPO: (VO) 2 P 2 O 7 -based catalyst, and isobutyric acid ODH to methacrylic acid on Fe hydroxyl phosphates. It is shown that active sites are composed of ensembles of atoms whose size and chemical composition depend on the reactants to be transformed (their chemical and size features) and the reaction mechanism, often of Mars and van Krevelen type. An important aspect is the fact that surface composition and surface crystalline structure vary with reaction on stream until reaching steady state, which makes characterisation of active and selective surface sites quite difficult. The use of oxidants other than O 2 , such as H 2 O 2 , N 2 O or CO 2 , is also briefly discussed. Based on such analysis and recent discoveries and process developments, our perspective is given.

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Catalytic Oxidative Cracking for Light Olefin Production

Kamaluddin

Narasimharao

2022

Heterogeneous Nanocatalysis for Energy and Environmental Sustainability

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Kinetics and mechanism of partial oxidation of ethane to ethylene and acetic acid over MoV type catalysts

Cited by 53 publications

References 20 publications

Reaction kinetics of ethane partial oxidation to acetic acid

Reaction kinetics of ethane partial oxidation to acetic acid

Heterogeneous Partial (amm)Oxidation and Oxidative Dehydrogenation Catalysis on Mixed Metal Oxides

Catalytic Oxidative Cracking for Light Olefin Production

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