Catalytic partial oxidation of methane to synthesis gas over Ni-based catalysts. 2: Transient, FTIR, and XRD measurements

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · Journal of Catalysis

DOI:https://doi.org/10.1006/jcat.1998.2183· OSTI ID:672472

Tsipouriari, V A; Verykios, X E ^[1]

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1. Univ. of Patras (Greece). Dept. of Chemical Engineering

Ni/La{sub 2}O{sub 3} and Ni/Al{sub 2}O{sub 3} catalysts were studied under conditions of partial oxidation of methane to synthesis gas. Temperature-programmed oxidation and hydrogenation experiments have shown that carbon accumulation over Ni/La{sub 2}O{sub 3} during CPO remains essentially constant after 2 h time on-stream, while over Ni/Al{sub 2}O{sub 3} it increases during the initial several hours. FTIR spectroscopy of surface species formed over the Ni/La{sub 2}O{sub 3} catalyst under reaction conditions indicates that the carbonate species formed over the support do not decompose under He and O{sub 2} treatment at 600 C. XRD spectra obtained following high ({approximately}90%) or low (<10%) methane conversions show that Ni, La{sub 2}O{sub 3}, La{sub 2}O{sub 2}CO{sub 3}, NiO, and Ni{sub 3}C phases are present in the case of high methane and complete oxygen conversions, while nickel oxide, nickel carbide and, to a small extent, La{sub 2}O{sub 2}CO{sub 3} phases are present in the case of low CH{sub 4} and incomplete oxygen conversions.

• OSTI ID: 672472
• Journal Information: Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 1 Vol. 179; ISSN JCTLA5; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
10 SYNTHETIC FUELS
36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CATALYSTS
LANTHANUM OXIDES
METHANE
NICKEL
PARTIAL OXIDATION PROCESSES
PHASE STUDIES
SURFACE PROPERTIES
SYNTHESIS GAS