Selective methane oxidation over promoted oxide catalysts. Quarterly report, March--May 1994

Technical Report · Wed Jun 01 00:00:00 EDT 1994

DOI:https://doi.org/10.2172/10175607· OSTI ID:10175607

Klier, K; Herman, R G; Shi, Chunlei; Sun, Qun

Experimental work aiming at developing active catalysts for selective oxidation of methane to methanol was started in this quarter. Some of the experiments used a double catalyst bed design and with H{sub 2}O as cofeed. The first catalyst bed, which serves as CH{sub 3} radical generator, was chosen to be 1 wt % SO{sub 4}{sup 2{minus}}/Sr/La{sub 2}O{sub 3}, as this catalyst exhibits remarkable activity and selectivity at lower temperature (500{degrees}C--550{degrees}C). A few transition metal oxides were used as the second catalyst bed to react with CH{sub 3} to form CH{sub 3}O{sup {minus}}M{sup +} species, which was then hydrolyzed to form CH{sub 3}OH. It was found that unsupported metal oxides ZrO{sub 2}, Y{sub 2}O{sub 3}, SrO; Fe{sub 2}O{sub 3},MnO{sub 2}, Cr{sub 2}O{sub 3}, CaO, and MgO did not produce CH{sub 3}OH between 430{degrees}C and 600{degrees}C when used as the only catalysts, while MoO{sub 3} supported on silica produced CH{sub 3}0H in the temperature range of 430{degrees}C--480{degrees}C under the current single-bed reactor configuration. However, when the double-bed configuration was used with the 1 wt % SO{sub 4}{sup 2{minus}}/Sr/La{sub 2}O{sub 3} as the first methyl radical generating catalyst bed, CH{sub 3}0H was observed when ZrO{sub 2}and Y{sub 2}O{sub 3} were used as the second bed catalysts. Preliminary quantitative analysis showed that the ability of producing CH{sub 3}OH was in the order of unsupported Y{sub 2}O{sub 3} > unsupported ZrO{sub 2} > MoO{sub 3} on silica. For all of these cases, the CH{sub 3}OH space time yield was within a dozen grams per kilogram catalyst per hour.

• Research Organization: Lehigh Univ., Bethlehem, PA (United States). Zettlemoyer Center for Surface Studies
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG21-92MC29228
• OSTI ID: 10175607
• Report Number(s): DOE/MC/29228-3837; ON: DE94012270; BR: AB0530150/AB0550000
• Resource Relation: Other Information: PBD: Jun 1994
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
METHANE
OXIDATION
CATALYSTS
PERFORMANCE TESTING
STRONTIUM
CATALYTIC EFFECTS
LANTHANUM OXIDES
YTTRIUM OXIDES
ZIRCONIUM OXIDES
MOLYBDENUM OXIDES
METHANOL
CHEMICAL PREPARATION
PROGRESS REPORT
EXPERIMENTAL DATA
SILICA
CATALYST SUPPORTS
COMPARATIVE EVALUATIONS
100200
400201
PRODUCTION
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES