Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe0.6Cu0.3Ti0.1O3-δ Membrane for Partial Oxidation of Methane to Syngas

›› 2008, Vol. 16 ›› Issue (3): 411-415.

Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas

董新法¹, 张恒², 林维明¹

1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China;
2. College of Chemistry Science, Qufu Normal University, Qufu 273165, China

收稿日期:2007-09-25 修回日期:2008-04-04 出版日期:2008-06-28 发布日期:2008-06-28
通讯作者: DONG Xinfa,E-mail:cexfdong@scut.edu.cn
基金资助:
Natural Science Foundation of Guangdong Province (030514);the Science and Technology Program ofGuangdong Province (2004B33401006)

Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas

DONG Xinfa¹, ZHANG Heng², LIN Weiming¹

1. School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China;
2. College of Chemistry Science, Qufu Normal University, Qufu 273165, China

Received:2007-09-25 Revised:2008-04-04 Online:2008-06-28 Published:2008-06-28
Supported by:
Natural Science Foundation of Guangdong Province (030514);the Science and Technology Program ofGuangdong Province (2004B33401006)

摘要/Abstract

摘要： Dense membrane with the composition of SrFe_0.6Cu_0.3Ti_0.1O_3-δ(SFCTO)was prepared by solid state reaction method.Oxygen permeation flux through this membrane was investigated at operating temperature ranging from 750℃ to 950℃ and different oxygen partial pressure.XRD measurements indicated that the compound was able to form single-phased perovskite structure in which part of Fe was replaced by Cu and Ti.The oxygen desorption and the reducibility of SFCTO powder were characterized by thermogravimetric analysis and temperature programmed reduction analysis,respectively.It was found that SFCTO had good structure stability under low oxygen pressure at high temperature.The addition of Ti increased the reduction temperature of Cu and Fe.Performance tests showed that the oxygen permeation flux through a 1.5 mm thick SFCTO membrane was 0.35-0.96 ml·min^-1·cm^-2 under air/helium oxygen partial pressure gradient with activation energy of 53.2 kJ·mol^-1.The methane conversion of 85%,CO selectivity of 90%and comparatively higher oxygen permeation flux of 5 ml·min^-1·cm^-2 were achieved at 850℃,when a SFCTO membrane reactor loaded with Ni-Ce/Al₂O₃ catalyst was applied for the partial oxidation of methane to syngas.

关键词: oxygen permeation, mixed conductor, methane, partial oxidation

Abstract: Dense membrane with the composition of SrFe_0.6Cu_0.3Ti_0.1O_3-δ (SFCTO) was prepared by solid state reaction method.Oxygen permeation flux through this membrane was investigated at operating temperature ranging from 750℃ to 950℃ and different oxygen partial pressure.XRD measurements indicated that the compound was able to form single-phased perovskite structure in which part of Fe was replaced by Cu and Ti.The oxygen desorption and the reducibility of SFCTO powder were characterized by thermogravimetric analysis and temperature programmed reduction analysis,respectively.It was found that SFCTO had good structure stability under low oxygen pressure at high temperature.The addition of Ti increased the reduction temperature of Cu and Fe.Performance tests showed that the oxygen permeation flux through a 1.5 mm thick SFCTO membrane was 0.35-0.96 ml·min^-1·cm^-2 under air/helium oxygen partial pressure gradient with activation energy of 53.2 kJ·mol^-1.The methane conversion of 85%,CO selectivity of 90% and comparatively higher oxygen permeation flux of 5 ml·min^-1·cm^-2 were achieved at 850℃,when a SFCTO membrane reactor loaded with Ni-Ce/Al₂O₃ catalyst was applied for the partial oxidation of methane to syngas.

Key words: oxygen permeation, mixed conductor, methane, partial oxidation

董新法, 张恒, 林维明. Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas[J]. , 2008, 16(3): 411-415.

DONG Xinfa, ZHANG Heng, LIN Weiming. Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas[J]. , 2008, 16(3): 411-415.

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Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas

Preparation and Characterization of a Perovskite-type Mixed Conducting SrFe_0.6Cu_0.3Ti_0.1O_3-δ Membrane for Partial Oxidation of Methane to Syngas

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