Oxidation of isobutane over complex oxides containing V and Mg2V2O7 catalysts partially substituted by transition metal ions

Qing Xia, Yoshiaki Obana, Hiroyasu Nishiguchi, I. T.O. Masami, Tatsumi Ishihara, Yusaku Takita

Research output: Contribution to journalArticle

Abstract

The oxidation of isobutane was investigated over various complex vanadium oxide catalysts. Mg2V2O7, MgV2O6, and Mg3V2O8 are effective catalysis for isobutene formation at >300°C. Cu2V2O7 and CaV2O6 showed intermediate activity and BiVO4 and Ca7V4O17 were slightly active. The active catalysts had relatively strong acidic sites, and H abstraction from the t-carbon of isobutane by acidic site was considered to be the initial and rate-determining step because a linear relationship was observed between the amount of acidic sites and the catalytic activity of the catalysts. The introduction of transition metals into the Mg sites of the Mg2V2O7 crystal lattice formed Mg1.8V2M0.2O7 (M = Mn, Cr, Fe, Co, Ni) catalysts. This substitution significantly promoted the catalytic activity without changing the selectivity for isobutene. Introduction of these transition metals increased the reactivity of lattice oxygen in Mg1.8V2M0.2O7 catalysts. Decreased WIF, increased the selectivity for isobutene to approaching 100%, suggesting that the initial reaction is the oxidative dehydrogenation of isobutane without parallel COx formation.

Original languageEnglish
Pages (from-to)87-92
Number of pages6
Journaljournal of the japan petroleum institute
Volume46
Issue number3
Publication statusPublished - Dec 1 2008
Externally publishedYes

Fingerprint

Transition metals
Metal ions
Oxidation
Catalysts
Oxides
Catalyst selectivity
Catalyst activity
Dehydrogenation
Crystal lattices
Vanadium
Catalysis
Substitution reactions
Carbon
Oxygen

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Oxidation of isobutane over complex oxides containing V and Mg2V2O7 catalysts partially substituted by transition metal ions. / Xia, Qing; Obana, Yoshiaki; Nishiguchi, Hiroyasu; Masami, I. T.O.; Ishihara, Tatsumi; Takita, Yusaku.

In: journal of the japan petroleum institute, Vol. 46, No. 3, 01.12.2008, p. 87-92.

Research output: Contribution to journalArticle

Xia, Qing ; Obana, Yoshiaki ; Nishiguchi, Hiroyasu ; Masami, I. T.O. ; Ishihara, Tatsumi ; Takita, Yusaku. / Oxidation of isobutane over complex oxides containing V and Mg2V2O7 catalysts partially substituted by transition metal ions. In: journal of the japan petroleum institute. 2008 ; Vol. 46, No. 3. pp. 87-92.
@article{3896d76196bc4451b2607921d187088d,
title = "Oxidation of isobutane over complex oxides containing V and Mg2V2O7 catalysts partially substituted by transition metal ions",
abstract = "The oxidation of isobutane was investigated over various complex vanadium oxide catalysts. Mg2V2O7, MgV2O6, and Mg3V2O8 are effective catalysis for isobutene formation at >300°C. Cu2V2O7 and CaV2O6 showed intermediate activity and BiVO4 and Ca7V4O17 were slightly active. The active catalysts had relatively strong acidic sites, and H abstraction from the t-carbon of isobutane by acidic site was considered to be the initial and rate-determining step because a linear relationship was observed between the amount of acidic sites and the catalytic activity of the catalysts. The introduction of transition metals into the Mg sites of the Mg2V2O7 crystal lattice formed Mg1.8V2M0.2O7 (M = Mn, Cr, Fe, Co, Ni) catalysts. This substitution significantly promoted the catalytic activity without changing the selectivity for isobutene. Introduction of these transition metals increased the reactivity of lattice oxygen in Mg1.8V2M0.2O7 catalysts. Decreased WIF, increased the selectivity for isobutene to approaching 100{\%}, suggesting that the initial reaction is the oxidative dehydrogenation of isobutane without parallel COx formation.",
author = "Qing Xia and Yoshiaki Obana and Hiroyasu Nishiguchi and Masami, {I. T.O.} and Tatsumi Ishihara and Yusaku Takita",
year = "2008",
month = "12",
day = "1",
language = "English",
volume = "46",
pages = "87--92",
journal = "Journal of the Japan Petroleum Institute",
issn = "1346-8804",
publisher = "Japan Petroleum Institute",
number = "3",

}

TY - JOUR

T1 - Oxidation of isobutane over complex oxides containing V and Mg2V2O7 catalysts partially substituted by transition metal ions

AU - Xia, Qing

AU - Obana, Yoshiaki

AU - Nishiguchi, Hiroyasu

AU - Masami, I. T.O.

AU - Ishihara, Tatsumi

AU - Takita, Yusaku

PY - 2008/12/1

Y1 - 2008/12/1

N2 - The oxidation of isobutane was investigated over various complex vanadium oxide catalysts. Mg2V2O7, MgV2O6, and Mg3V2O8 are effective catalysis for isobutene formation at >300°C. Cu2V2O7 and CaV2O6 showed intermediate activity and BiVO4 and Ca7V4O17 were slightly active. The active catalysts had relatively strong acidic sites, and H abstraction from the t-carbon of isobutane by acidic site was considered to be the initial and rate-determining step because a linear relationship was observed between the amount of acidic sites and the catalytic activity of the catalysts. The introduction of transition metals into the Mg sites of the Mg2V2O7 crystal lattice formed Mg1.8V2M0.2O7 (M = Mn, Cr, Fe, Co, Ni) catalysts. This substitution significantly promoted the catalytic activity without changing the selectivity for isobutene. Introduction of these transition metals increased the reactivity of lattice oxygen in Mg1.8V2M0.2O7 catalysts. Decreased WIF, increased the selectivity for isobutene to approaching 100%, suggesting that the initial reaction is the oxidative dehydrogenation of isobutane without parallel COx formation.

AB - The oxidation of isobutane was investigated over various complex vanadium oxide catalysts. Mg2V2O7, MgV2O6, and Mg3V2O8 are effective catalysis for isobutene formation at >300°C. Cu2V2O7 and CaV2O6 showed intermediate activity and BiVO4 and Ca7V4O17 were slightly active. The active catalysts had relatively strong acidic sites, and H abstraction from the t-carbon of isobutane by acidic site was considered to be the initial and rate-determining step because a linear relationship was observed between the amount of acidic sites and the catalytic activity of the catalysts. The introduction of transition metals into the Mg sites of the Mg2V2O7 crystal lattice formed Mg1.8V2M0.2O7 (M = Mn, Cr, Fe, Co, Ni) catalysts. This substitution significantly promoted the catalytic activity without changing the selectivity for isobutene. Introduction of these transition metals increased the reactivity of lattice oxygen in Mg1.8V2M0.2O7 catalysts. Decreased WIF, increased the selectivity for isobutene to approaching 100%, suggesting that the initial reaction is the oxidative dehydrogenation of isobutane without parallel COx formation.

UR - http://www.scopus.com/inward/record.url?scp=66249123630&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=66249123630&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:66249123630

VL - 46

SP - 87

EP - 92

JO - Journal of the Japan Petroleum Institute

JF - Journal of the Japan Petroleum Institute

SN - 1346-8804

IS - 3

ER -