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Microscopic nature and elemental composition of brown coal fly ash particles from a large coal fired power station

Zou, Linda 2001, Microscopic nature and elemental composition of brown coal fly ash particles from a large coal fired power station, in APCSEET 2001 : Proceedings of the 3rd Asia-Pacific Conference on Sustainable Energy and Environmental Technologies, World Scientific, Singapore, pp. 392-397.

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Title Microscopic nature and elemental composition of brown coal fly ash particles from a large coal fired power station
Author(s) Zou, Linda
Conference name Asia-Pacific Conference on Sustainable Energy and Environmental Technologies (3rd : 2000 : Hong Kong)
Conference location Hong Kong
Conference dates 3-6 Dec. 2000
Title of proceedings APCSEET 2001 : Proceedings of the 3rd Asia-Pacific Conference on Sustainable Energy and Environmental Technologies
Editor(s) Hu, Xijun
Yue, Po Lock
Publication date 2001
Start page 392
End page 397
Publisher World Scientific
Place of publication Singapore
Summary In this study, Australian brown coal fly ash particles have been collected from power station and analysed by scanning electron microscopy to obtain morphological information and elemental composition of individual particles. The most common particles found to be the irregular shape particle aggregates. Other shapes include ball shape with smooth surface and with some attachments; and crystal shape fine particles. The X-ray spectra of each fly ash particle revealed five groups of elemental composition, they are Si-rich particles; Ca-rich particles; Fe-rich particles; particles with Mg-Ca Matrix and particles with Si-Ca matrix. A particle sire distribution analysis has been conducted using particle size analyser and found to have a mean particle size of 21fim. The sample then was separated into fine and coarse fractions using aerodynamic classifier, and the elemental composition of both fractions were determined by ICP-AES. Borate fusion and acid dissolution method was used for sample preparation. It is found that some environmental sensitive elements such as Zn, Pb, Ni, K and Cu are enriched in fine fly ash particles. Ca has much higher contents in fine particles as well. Si and Mg have higher concentrations in coarse particles.
ISBN 9810245491
9789810245498
Language eng
Field of Research 090799 Environmental Engineering not elsewhere classified
Socio Economic Objective 859899 Environmentally Sustainable Energy Activities not elsewhere classified
HERDC Research category E1 Full written paper - refereed
Persistent URL http://hdl.handle.net/10536/DRO/DU:30004433

Document type: Conference Paper
Collection: School of Engineering and Technology
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