Comparison of monolith-supported metals for the direct oxidation of methane of syngas

Journal Article · Mon Feb 28 23:00:00 EST 1994 · Journal of Catalysis; (United States)

DOI:https://doi.org/10.1016/0021-9517(94)90002-7· OSTI ID:6776603

Torniainen, P M; Chu, X; Schmidt, L D ^[1]

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1. Univ. of Minnesota, Minneapolis (United States)

The partial oxidation of CH[sub 4] in O[sub 2] near atmospheric pressure to produce syngas was investigated on monolith-supported Rh, Ni, Pt, Ir, Pd, Pd-La[sub 2]O[sub 3], Fe, Co, Re, and Ru catalysts in an autothermal flow reactor at residence times of [approximately]10 msec (GHSV [approximately] 100,000 hr[sup [minus]1]). Optimal CH[sub 4] conversion and CO and H[sub 2] selectivities of 0.89, 0.95, and 0.90, respectively, were achieved on Rh at 1000[angstrom]C with no loss in activity over many hours. Ni showed similar conversion and selectivities but deactivated. Experiments with up to 25 vol% H[sub 2]O added to the feed showed little evidence of the occurrence of steam reforming and water-gas shift reactions. Pt and Ir sustained stable reaction but a lower selectivities and conversion than Rh or Ni. Pd, Pd-La[sub 2]O[sub 3], and Co deactivated rapidly, while Re, Ru, and Fe would not sustain autothermal reaction. Ni and Re deactivated by volatilization and metal loss, while Pd-La[sub 2]O[sub 3] deactivated by carbon formation, and Pd deactivated by a combination of metal loss and carbon formation. Pd produced up to 14% selectivity to C[sub 2]H[sub 4] and C[sub 2]H[sub 4] and C[sub 2]H[sub 6], Pd-La[sub 2]O[sub 3] up to 5%, Pt [approximately] 1%, and other metals less than 0.2%. 10 refs., 5 figs., 1 tab.

• OSTI ID: 6776603
• Journal Information: Journal of Catalysis; (United States), Journal Name: Journal of Catalysis; (United States) Vol. 146:1; ISSN 0021-9517; ISSN JCTLA5
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030400 -- Natural Gas-- Products & By-Products
10 SYNTHETIC FUELS
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ABSORPTION SPECTROSCOPY
ALKANES
CATALYSIS
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COBALT
ELEMENTS
FLUIDS
GASES
HETEROGENEOUS CATALYSIS
HYDROCARBONS
IRIDIUM
IRON
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
METALS
METHANE
NICKEL
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
RARE EARTH COMPOUNDS
RHENIUM
RHODIUM
RUTHENIUM
SPECTROSCOPY
SYNTHESIS GAS
TRANSITION ELEMENTS
YIELDS