Oxide ion transport for selective oxidative coupling of methane with new membrane reactor

Journal Article · Sun May 01 00:00:00 EDT 1994 · AIChE Journal (American Institute of Chemical Engineers); (United States)

DOI:https://doi.org/10.1002/aic.690400513· OSTI ID:7262407

Nozaki, Takao; Fujimoto, Kaoru ^[1]

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1. Univ. of Tokyo (Japan). Dept. of Synthetic Chemistry

Oxidative coupling of methane was conducted by using membrane reactors. The nonporous membrane film that consisted of PbO modified by alkaline or alkaline earth compound was supported on porous SiO[sub 2]-Al[sub 2]O[sub 3] tube. Higher hydrocarbons were successfully synthesized with high selectivity (about 90%). A kinetic analysis was conducted to clarify whether oxide ion transportation through PbO film participated in the oxidative coupling of methane. The evaluated value of the diffusion coefficient of oxide ion transport based on the methane oxidation agreed well with that of published data. The simulated gradient of the oxide ion concentration through the PbO membrane agreed well with that measured by electron probe X-ray microanalyzer. A transient response simulated by using kinetic parameters evaluated from steady-state analysis also agreed well with the experiment. These results prove the validity of the reaction model that consists of surface reactions of methane with oxide ion which is transferred from inside to outside of the membrane reactor. Alkali modifiers on the PbO membrane surface exhibited a promotional effect on the surface reaction of methane coupling. Another membrane reactor containing Bi[sub 2]O[sub 3] showed higher activity than the PbO membrane.

• OSTI ID: 7262407
• Journal Information: AIChE Journal (American Institute of Chemical Engineers); (United States), Vol. 40:5; ISSN 0001-1541
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
10 SYNTHETIC FUELS
BISMUTH OXIDES
CATALYTIC EFFECTS
CHEMICAL REACTORS
DESIGN
LEAD OXIDES
METHANE
CATALYTIC REFORMING
OXIDATION
ALUMINIUM OXIDES
CATALYST SUPPORTS
CHEMICAL REACTION KINETICS
MEMBRANE TRANSPORT
OXYGEN
SILICON OXIDES
ALKANES
ALUMINIUM COMPOUNDS
BISMUTH COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
HYDROCARBONS
KINETICS
LEAD COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
REFORMER PROCESSES
SILICON COMPOUNDS
030400* - Natural Gas- Products & By-Products
100200 - Synthetic Fuels- Production- (1990-)