Synthesis of alumina from high purity alum derived from coal fly ash

H C Park; Y J Park; R Stevens

doi:10.1016/j.msea.2003.09.093

Synthesis of alumina from high purity alum derived from coal fly ash

H C Park, Y J Park, R Stevens

Department of Mechanical Engineering

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80 Citations (SciVal)

Abstract

High purity alum (>99.9%) has been produced by the reaction of NH4Al(SO4)(2) derived from coal fly ash and ammonia in water at a controlled pH and then followed by the successive crystallization. The influence of heating source (conventional and microwave) on the decomposition of the alum and the characteristics of the resultant alumina was examined by means of XRD, TG/DTA, SEM and a laser scattering technique. The application of microwave heating for decomposition of the alum yielded finer alpha-Al2O3 powders with a higher specific surface area, when compared with conventional heating. (C) 2003 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	166-170
Number of pages	5
Journal	Materials Science and Engineering A
Volume	367
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2003.09.093
Publication status	Published - 2004

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title = "Synthesis of alumina from high purity alum derived from coal fly ash",

abstract = "High purity alum (>99.9%) has been produced by the reaction of NH4Al(SO4)(2) derived from coal fly ash and ammonia in water at a controlled pH and then followed by the successive crystallization. The influence of heating source (conventional and microwave) on the decomposition of the alum and the characteristics of the resultant alumina was examined by means of XRD, TG/DTA, SEM and a laser scattering technique. The application of microwave heating for decomposition of the alum yielded finer alpha-Al2O3 powders with a higher specific surface area, when compared with conventional heating. (C) 2003 Elsevier B.V. All rights reserved.",

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year = "2004",

doi = "10.1016/j.msea.2003.09.093",

language = "English",

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journal = "Materials Science and Engineering A",

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AU - Park, H C

AU - Park, Y J

AU - Stevens, R

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AB - High purity alum (>99.9%) has been produced by the reaction of NH4Al(SO4)(2) derived from coal fly ash and ammonia in water at a controlled pH and then followed by the successive crystallization. The influence of heating source (conventional and microwave) on the decomposition of the alum and the characteristics of the resultant alumina was examined by means of XRD, TG/DTA, SEM and a laser scattering technique. The application of microwave heating for decomposition of the alum yielded finer alpha-Al2O3 powders with a higher specific surface area, when compared with conventional heating. (C) 2003 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.msea.2003.09.093

DO - 10.1016/j.msea.2003.09.093

M3 - Article

SN - 0921-5093

VL - 367

SP - 166

EP - 170

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

ER -

Synthesis of alumina from high purity alum derived from coal fly ash

Abstract

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