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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| Format: | Article |
| Language: | English |
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MDPI
2012
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| Online Access: | http://psasir.upm.edu.my/id/eprint/78035/ http://psasir.upm.edu.my/id/eprint/78035/1/78035.pdf |
| _version_ | 1848858395017216000 |
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| author | Matori, Khamirul Amin Loy, Chee Wah Hashim, Mansor Ismail, Ismayadi Mohd Zaid, Mohd Hafiz |
| author_facet | Matori, Khamirul Amin Loy, Chee Wah Hashim, Mansor Ismail, Ismayadi Mohd Zaid, Mohd Hafiz |
| author_sort | Matori, Khamirul Amin |
| building | UPM Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T12:12:45Z |
| format | Article |
| id | upm-78035 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:12:45Z |
| publishDate | 2012 |
| publisher | MDPI |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-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 |
| 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/78035/ http://psasir.upm.edu.my/id/eprint/78035/ http://psasir.upm.edu.my/id/eprint/78035/ http://psasir.upm.edu.my/id/eprint/78035/1/78035.pdf |