The enhancement of oxygen flux on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) hollow fibers using silver surface modification

被引：80

作者：

Leo, Adrian ^{[1
]}

Liu, Shaomin ^{[2
]}

da Costa, Joao C. Diniz ^{[1
]}

机构：

[1] Univ Queensland, FIMLab Films & Inorgan Membrane Lab, Div Chem Engn, Sch Engn, Brisbane, Qld 4072, Australia

[2] Curtin Univ Technol, Dept Chem Engn, Perth, WA 6845, Australia

来源：

JOURNAL OF MEMBRANE SCIENCE | 2009年 / 340卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

Hollow fiber; Perovskite; Mixed conduction; Oxygen permeation; Surface modification; PEROVSKITE-TYPE OXIDES; AIR SEPARATION; MEMBRANE REACTORS; PERMEATION; PERFORMANCE; REDUCTION; METHANE; TEMPERATURE; ACTIVATION; DISPERSION;

D O I：

10.1016/j.memsci.2009.05.022

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) hollow fibers were fabricated using a phase inversion/sintering method. As oxygen permeation of BSCF hollow fibers is controlled by the rate surface exchange kinetics, catalytic Ag particles were coated on both inner and outer surfaces using chemical deposition method, as verified by SEM and EDX The Ag coated BSCF membranes showed up to 100% increase in oxygen permeation at 700 degrees C, and improvements lower than 10% were measured at 950 degrees C as compared with unmodified membranes. It was found that Ag catalyst surface loading was non-homogenous and concentrated on the perovskite grain boundaries. As a result, lighter Ag surface loading delivered improved oxygen flux while oxygen flux reached a maximum even though in the presence of excess catalyst loading. The catalytic activity of Ag was beneficial in enhancing surface reaction kinetics up to 850 degrees C attributed to the spillover effect. Above this temperature, the increase in oxygen permeation rate was marginally diminished due to the reduction of the spillover effect. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：148 / 153

页数：6

共 39 条

[1] Integrated gasification gas combined cycle plant with membrane reactors: Technological and economical analysis [J].

Amelio, Mario ;

Morrone, Pietropaolo ;

Galucci, Fausto ;

Basile, Angelo .

ENERGY CONVERSION AND MANAGEMENT, 2007, 48 (10) :2680-2693

[2] Interaction of oxygen with silver at high temperature and atmospheric pressure: A spectroscopic and structural analysis of a strongly bound surface species [J].

Bao, X ;

Muhler, M ;

SchedelNiedrig, T ;

Schlogl, R .

PHYSICAL REVIEW B, 1996, 54 (03) :2249-2262

[3]

BOHM MC, 2007, INT J GREENH GAS CON, P113

[4] IMPORTANCE OF THE SURFACE EXCHANGE KINETICS AS RATE-LIMITING STEP IN OXYGEN PERMEATION THROUGH MIXED-CONDUCTING OXIDES [J].

BOUWMEESTER, HJM ;

KRUIDHOF, H ;

BURGGRAAF, AJ .

SOLID STATE IONICS, 1994, 72 (pt 2) :185-194

[5]

Bücker D, 2005, CARBON DIOXIDE CAPTURE FOR STORAGE IN DEEP GEOLOGIC FORMATIONS - RESULTS FROM THE CO2 CAPTURE PROJECT, VOLS 1 AND 2, P537

[6] Perovskite hollow fibre membranes in the partial oxidation of methane to synthesis gas in a membrane reactor [J].

Caro, Juegen ;

Schiestel, Thomas ;

Werth, Steffen ;

Wang, Haihui ;

Kleinert, Alexandra ;

Koelsch, Peter .

DESALINATION, 2006, 199 (1-3) :415-417

[7] Polymer membrane air separation performance for portable oxygen enriched combustion applications [J].

Coombe, H. Scott ;

Nieh, Sen .

ENERGY CONVERSION AND MANAGEMENT, 2007, 48 (05) :1499-1505

[8] Synthesis and characterization of reduced transition metal oxides and nanophase metals with hydrazine in aqueous solution [J].

Gui, Z ;

Fan, R ;

Mo, WQ ;

Chen, XH ;

Yang, L ;

Hu, Y .

MATERIALS RESEARCH BULLETIN, 2003, 38 (01) :169-176

[9]

JORDAL K, 2005, GREENHOUSE GAS CONTR, V7, P201

[10] Oxygen permeation through perovskite membranes and the improvement of oxygen flux by surface modification [J].

Leo, A. ;

Liu, S. ;

da Costa, J. C. Diniz ;

Shao, Z. .

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 2006, 7 (08) :819-825

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