Catalytic performance of La0.8Sr0.2FeMn1.5Al9.5O19-delta hexaaluminate-typed aerosol catalysts
Catalytic performance of La0.8Sr0.2FeMn1.5Al9.5O19-delta hexaaluminate-typed aerosol catalysts
La0.8Sr0.2FeMn1.5Al9.5O19-delta (LSFMAO) hexaaluminate aerosol was prepared by co-precipitation combined with supercritical drying and high temperature calcinations. XRD, SEM, BET, TPR characterizations as well as methane catalytic combustion were performed to investigate the effects of supercritical drying and high temperature calcinations on the structure and reactivity of the catalysts. The results indicated that the plate-like LSFMAO hexaaluminate aerosol was formed after calcination of the aerosol precursors at 1200 degrees C. The as-prepared LSFMAO hexaaluminate possesses large specific surface area (16 m(2)center dot g(-1)) and excellent catalytic combustion activity at high gas space velocity. However, further calcinations of the LSFMAO hexaaluminate at 1300 degrees C and 1400 degrees C resulted in severe sintering and reduction of catalytic activity. These results revealed that supercritical drying was helpful to promote the combustion activity and resist sintering of the LSFMAO hexaaluminate up to 1200 degrees C above which the sintering resistance and redox performance of LSFMAO hexaaluminates were mainly determined by the components and intrinsic properties.
211-216
Zhang, Y.Y.
671b8772-1605-4122-ba3e-54861e85bace
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhang, S.C.
c23884ca-5e3a-4098-824d-ea78a762fc6f
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
March 2008
Zhang, Y.Y.
671b8772-1605-4122-ba3e-54861e85bace
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Zhang, S.C.
c23884ca-5e3a-4098-824d-ea78a762fc6f
Zhu, Q.S.
aa90bc46-f7d5-40d6-9505-21028680800f
Zhang, Y.Y., Jiang, Zheng, Zhang, S.C. and Zhu, Q.S.
(2008)
Catalytic performance of La0.8Sr0.2FeMn1.5Al9.5O19-delta hexaaluminate-typed aerosol catalysts.
Acta Physico-Chimica Sinica, 24 (2), .
Abstract
La0.8Sr0.2FeMn1.5Al9.5O19-delta (LSFMAO) hexaaluminate aerosol was prepared by co-precipitation combined with supercritical drying and high temperature calcinations. XRD, SEM, BET, TPR characterizations as well as methane catalytic combustion were performed to investigate the effects of supercritical drying and high temperature calcinations on the structure and reactivity of the catalysts. The results indicated that the plate-like LSFMAO hexaaluminate aerosol was formed after calcination of the aerosol precursors at 1200 degrees C. The as-prepared LSFMAO hexaaluminate possesses large specific surface area (16 m(2)center dot g(-1)) and excellent catalytic combustion activity at high gas space velocity. However, further calcinations of the LSFMAO hexaaluminate at 1300 degrees C and 1400 degrees C resulted in severe sintering and reduction of catalytic activity. These results revealed that supercritical drying was helpful to promote the combustion activity and resist sintering of the LSFMAO hexaaluminate up to 1200 degrees C above which the sintering resistance and redox performance of LSFMAO hexaaluminates were mainly determined by the components and intrinsic properties.
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Published date: March 2008
Organisations:
Faculty of Engineering and the Environment
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Local EPrints ID: 352806
URI: http://eprints.soton.ac.uk/id/eprint/352806
ISSN: 1872-1508
PURE UUID: 208e293b-5712-479b-873c-528be479069c
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Date deposited: 21 May 2013 13:43
Last modified: 11 Dec 2021 04:44
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Author:
Y.Y. Zhang
Author:
S.C. Zhang
Author:
Q.S. Zhu
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