Hydrothermal transformation of metakaolinite under basic solution
An amorphous metakaolinite was treated hydrothermally with 1.25M KOH solution at 190 °C during different reaction times ranging from 0 to 48 h. The products obtained were characterised by X-ray diffraction in order to determine their mineralogical characteristics. Two distinct mechanisms can explain...
| Những tác giả chính: | , , , |
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| Định dạng: | Proceedings |
| Ngôn ngữ: | English English |
| Được phát hành: |
Pusat e-pembelajaran, UMS
2022
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| Những chủ đề: | |
| Truy cập trực tuyến: | https://eprints.ums.edu.my/id/eprint/41259/1/ABSTRACT.pdf https://eprints.ums.edu.my/id/eprint/41259/2/FULL%20TEXT.pdf |
| Tóm tắt: | An amorphous metakaolinite was treated hydrothermally with 1.25M KOH solution at 190 °C during different reaction times ranging from 0 to 48 h. The products obtained were characterised by X-ray diffraction in order to determine their mineralogical characteristics. Two distinct mechanisms can explain the change of the precursor material in KOH solutions: (1) precipitation and (2) dissolution. At the initial stage, only gibbsite and quartz can be identified from the major peaks of the diffractograms, while after 12 hours, zeolite F and kalsilite have been formed before the formation of leucite after 48 hours. |
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