Partial oxidation of CH/sub 4/ to HCHO over a MoO/sub 3/-SiO/sub 2/ catalyst: A kinetic study

Journal Article · Sun Nov 01 04:00:00 EST 1987 · A.I.Ch.E. J.; (United States)

OSTI ID:5419065

Spencer, N D; Pereira, C J

There is considerable economic incentive to convert methane into formaldehyde, which is used in the manufacture of insulating materials and adhesives. This paper discusses the kinetics of a one-step oxidation of methane with molecular oxygen over a MoO/sub 3/-SiO/sub 2/ catalyst. The space velocity was varied between 2,500 and 10,000 h/sup -1/(at NTP) over a range of temperatures from 848 to 923 K. Selectivities to formaldehyde between 30 and 89% were observed in the 0-5% methane conversion range, the other principal products being CO, CO/sub 2/, and H/sub 2/O. Kinetic analysis indicates that methane is directly oxidized to CO/sub 2/ and HCHO, with HCHO being further oxidized to CO. The reactions were all found to be zero order in oxygen concentration, with methane and formaldehyde oxidation following overall first-order rate laws. Kinetic rate constants have been determined and there is good agreement between model predictions and experimental data.

• Research Organization: W.R. Grace and Co., Research Div., Columbia, MD 21044
• OSTI ID: 5419065
• Journal Information: A.I.Ch.E. J.; (United States), Journal Name: A.I.Ch.E. J.; (United States) Vol. 33:11; ISSN AICEA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALDEHYDES
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
FORMALDEHYDE
HIGH TEMPERATURE
HYDROCARBONS
KINETICS
METHANE
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PRODUCTION
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENT COMPOUNDS