Oxidation of isobutane catalyzed by Cs{sub x}H{sub 3-x}PMo{sub 12}O{sub 40}-based heteropoly compounds

Journal Article · Sun Sep 15 04:00:00 EDT 1996 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1996.0307· OSTI ID:508461

Mizuno, Noritaka; Tateishi, Masaki; Iwamoto, Masakazu ^[1]

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1. Univ. of Tokyo (Japan)

The oxidation of isobutane has been found to be catalyzed by 12-molybdophosphates. Among the alkali metals, the substitution of Cs{sup +} for H{sub +} in H{sub 3}PMo{sub 12}O{sub 40} resulted in the greatest enhancement of the yield of methacryclic acid and the yield reached a maximum around the Cs{sup +} content of 2.5. The rare per specific surface areas of Cs{sub x}H{sub 3-x}PMo{sub 12}O{sub 40} (x = 0-3) decreased monotonously with x. It was suggested that isobutane oxidation is a surface-type reaction and the catalytic activity is controlled by the oxidizing ability of the catalyst surface. The catalytic properties of Cs{sub 2.5}H{sub 0.5}PMo{sub 12}O{sub 40} were changed by the substitution of metal ions: Ni{sub 2+}, Mn{sub 2+}, or Fe{sub 3+} substitution greatly increased the sum of yields of methacryclic acid and methacrolein, while the Co{sup 2+}, Cu{sup 2+}, Hg{sup 2+}, Hg{sup 2+}, Pt{sup 2+}, or Pd{sup 2+} substitution decreased the sum of the yields. Among the transition and precious metals, the highest activity and total yield of methacryclic acid and methacrolein were observed for Ni. The preferred content of Ni was 0.08. 32 refs., 6 figs., 4 tabs.

• OSTI ID: 508461
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 163; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
10 SYNTHETIC FUELS
40 CHEMISTRY
BUTANE
CATALYTIC EFFECTS
CESIUM COMPOUNDS
HETEROGENEOUS CATALYSIS
MOLYBDOPHOSPHATES
OXIDATION
STOICHIOMETRY
TRANSITION ELEMENT COMPOUNDS