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Title: Integrating air separation with partial oxidation of methane-A novel configuration of asymmetric tubular ceramic membrane reactor
Authors: Yin, X. 
Hong, L. 
Liu, Z.
Keywords: Air separation
Ionic conducting ceramic membrane
Membrane reactor
Nickel catalyst
Partial oxidation of methane (POM)
Issue Date: 20-Mar-2008
Citation: Yin, X., Hong, L., Liu, Z. (2008-03-20). Integrating air separation with partial oxidation of methane-A novel configuration of asymmetric tubular ceramic membrane reactor. Journal of Membrane Science 311 (1-2) : 89-97. ScholarBank@NUS Repository.
Abstract: This paper reports a new design of ceramic asymmetric tubular reactor for correlating air separation with catalytic partial oxidation of methane (POM). The tubular membrane reactor consists of three annular layers, a porous and thin La0.2Sr0.8MnO3-δ (LSM80)-Ce0.8Gd0.2O2-δ (CGO20) cathodic layer, a dense and thin YSZ⊥(Pd-TiO2) mixed conducting layer as the electrolyte layer, and a porous and thick YSZ-Ni anodic layer. For realizing mixed-conducting electrolyte layer, an electronic conductive Pd-TiO2 stripe was wedged into a dense YSZ coating layer via a specially designed two-step calcination process. The resulting membrane reactor was assessed by its POM output in a broad temperature range as well as by its capability to clean up the coke deposited on Ni(0) catalyst. It demonstrated high methane conversion (>90%), CO selectivity (>90%) and H2 selectivity (>80%) at 850 °C. Besides the experimental work, a mathematical model including the two major POM mechanisms responsible for the methane conversion over the temperature span of study was developed and employed to simulate the experimental XC H4 (conversion) ∼1/T data. The kinetic parameters obtained well accounted for the characteristics of these two reaction mechanisms. © 2007 Elsevier B.V. All rights reserved.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/j.memsci.2007.11.049
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