Ceramic membrane reator for converting methane to syngas.

Journal Article · Fri Jun 06 04:00:00 EDT 1997 · Catal. Today

DOI:https://doi.org/10.1016/S0920-5861(96)00229-5· OSTI ID:937837

Balachandran, U; Dusek, J T; Maiya, P S; Ma, B; Mieville, R L; Kleefisch, M S; Udovich, C A

Certain perovskite-type oxides (ABO{sub 3}) containing transition metals on the B-site show mixed (electronic/ionic) conductivity. These mixed-conductivity oxides are promising materials for oxygen-permeating membranes that can operate without electrodes or external electrical circuitry. Oxides in the system Sr---Fe---Co---O permeate large amounts of oxygen, and extruded tubes of these materials have been evaluated in a reactor operating at {approx} 850 C for direct conversion of methane into syngas (CO + H{sub 2}) in the presence of a reforming catalyst. Methane conversion efficiencies of > 99% were observed, and some of the reactor tubes have been operated for more than 1000h. Membrane tubes were fabricated from calcined powders by a plastic extrusion technique. Ceramic powders in the Sr---Fe---Co---O system were made by solid-state reaction of the constituent carbonates, oxides, and/or nitrates. The chemical-phase behavior of the ceramic powders with varying stoichiometries were studied by high-temperature in-situ X-ray diffraction (XRD) as a function of oxygen partial pressure. The sintered extruded tubes were also characterized by XRD and scanning electron microscopy.

• Research Organization: Argonne National Laboratory (ANL)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 937837
• Report Number(s): ANL/ET/JA-21579
• Journal Information: Catal. Today, Journal Name: Catal. Today Journal Issue: 3 ; Jun. 6, 1997 Vol. 36; ISSN 0920-5861; ISSN CATTEA
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

03 NATURAL GAS
CARBONATES
CERAMICS
ELECTRODES
EXTRUSION
MEMBRANES
METHANE
NITRATES
OXIDES
OXYGEN
PARTIAL PRESSURE
PLASTICS
SCANNING ELECTRON MICROSCOPY
TRANSITION ELEMENTS
X-RAY DIFFRACTION