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Phase transformations of α-alumina made from waste aluminum via a precipitation technique

We report on a recycling project in which α-Al2O3 was produced from aluminum cans because no such work has been reported in literature. Heated aluminum cans were mixed with 8.0 M of H2SO4 solution to form an Al2(SO4)3 solution. The Al2(SO4)3 salt was contained in a white semi-liquid solution with ex...

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Main Authors: Matori, Khamirul Amin, Loy, Chee Wah, Hashim, Mansor, Ismail, Ismayadi, Mohd Zaid, Mohd Hafiz
Format: Article
Language:English
Published: MDPI 2012
Online Access:http://psasir.upm.edu.my/id/eprint/78035/1/78035.pdf
http://psasir.upm.edu.my/id/eprint/78035/
https://www.mdpi.com/1422-0067/13/12/16812
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spelling my.upm.eprints.780352020-06-02T03:07:51Z http://psasir.upm.edu.my/id/eprint/78035/ Phase transformations of α-alumina made from waste aluminum via a precipitation technique Matori, Khamirul Amin Loy, Chee Wah Hashim, Mansor Ismail, Ismayadi Mohd Zaid, Mohd Hafiz We report on a recycling project in which α-Al2O3 was produced from aluminum cans because no such work has been reported in literature. Heated aluminum cans were mixed with 8.0 M of H2SO4 solution to form an Al2(SO4)3 solution. The Al2(SO4)3 salt was contained in a white semi-liquid solution with excess H2SO4; some unreacted aluminum pieces were also present. The solution was filtered and mixed with ethanol in a ratio of 2:3, to form a white solid of Al2(SO4)3·18H2O. The Al2(SO4)3·18H2O was calcined in an electrical furnace for 3 h at temperatures of 400–1400 °C. The heating and cooling rates were 10 °C /min. XRD was used to investigate the phase changes at different temperatures and XRF was used to determine the elemental composition in the alumina produced. A series of different alumina compositions, made by repeated dehydration and desulfonation of the Al2(SO4)3·18H2O, is reported. All transitional alumina phases produced at low temperatures were converted to α-Al2O3 at high temperatures. The X-ray diffraction results indicated that the α-Al2O3 phase was realized when the calcination temperature was at 1200 °C or higher. MDPI 2012 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/78035/1/78035.pdf Matori, Khamirul Amin and Loy, Chee Wah and Hashim, Mansor and Ismail, Ismayadi and Mohd Zaid, Mohd Hafiz (2012) Phase transformations of α-alumina made from waste aluminum via a precipitation technique. International Journal of Molecular Sciences, 13 (12). pp. 16812-16821. ISSN 1661-6596; ESSN: 1422-0067 https://www.mdpi.com/1422-0067/13/12/16812 10.3390/ijms131216812
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description We report on a recycling project in which α-Al2O3 was produced from aluminum cans because no such work has been reported in literature. Heated aluminum cans were mixed with 8.0 M of H2SO4 solution to form an Al2(SO4)3 solution. The Al2(SO4)3 salt was contained in a white semi-liquid solution with excess H2SO4; some unreacted aluminum pieces were also present. The solution was filtered and mixed with ethanol in a ratio of 2:3, to form a white solid of Al2(SO4)3·18H2O. The Al2(SO4)3·18H2O was calcined in an electrical furnace for 3 h at temperatures of 400–1400 °C. The heating and cooling rates were 10 °C /min. XRD was used to investigate the phase changes at different temperatures and XRF was used to determine the elemental composition in the alumina produced. A series of different alumina compositions, made by repeated dehydration and desulfonation of the Al2(SO4)3·18H2O, is reported. All transitional alumina phases produced at low temperatures were converted to α-Al2O3 at high temperatures. The X-ray diffraction results indicated that the α-Al2O3 phase was realized when the calcination temperature was at 1200 °C or higher.
format Article
author Matori, Khamirul Amin
Loy, Chee Wah
Hashim, Mansor
Ismail, Ismayadi
Mohd Zaid, Mohd Hafiz
spellingShingle Matori, Khamirul Amin
Loy, Chee Wah
Hashim, Mansor
Ismail, Ismayadi
Mohd Zaid, Mohd Hafiz
Phase transformations of α-alumina made from waste aluminum via a precipitation technique
author_facet Matori, Khamirul Amin
Loy, Chee Wah
Hashim, Mansor
Ismail, Ismayadi
Mohd Zaid, Mohd Hafiz
author_sort Matori, Khamirul Amin
title Phase transformations of α-alumina made from waste aluminum via a precipitation technique
title_short Phase transformations of α-alumina made from waste aluminum via a precipitation technique
title_full Phase transformations of α-alumina made from waste aluminum via a precipitation technique
title_fullStr Phase transformations of α-alumina made from waste aluminum via a precipitation technique
title_full_unstemmed Phase transformations of α-alumina made from waste aluminum via a precipitation technique
title_sort phase transformations of α-alumina made from waste aluminum via a precipitation technique
publisher MDPI
publishDate 2012
url http://psasir.upm.edu.my/id/eprint/78035/1/78035.pdf
http://psasir.upm.edu.my/id/eprint/78035/
https://www.mdpi.com/1422-0067/13/12/16812
_version_ 1669008852098482176
score 13.211869

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