A Study on the thermal destruction of rice husk in air and nitrogen atmosphere |
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Authors: | I G Markovska L A Lyubchev |
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Institution: | (1) Department of Silicate Technology, Assen Zlatarov University, Prof. Yakimov Str., 8010 Bourgas, Bulgaria |
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Abstract: | The methods of X-ray analysis, infrared spectroscopy, differential thermal analysis and scanning electron microscopy were
used in this study. The objects of the experiments were rice husk obtained during processing of rice, variety Krasnodarski
424. The rice husk was burnt in air and in non-oxygen medium at several burning temperatures. The color of the oxidized product
was stipulated by the burning temperature. The X-ray analysis showed that the amorphous SiO2 present in the rice husk begins to crystallize in the form of α-cristobalite at 850°C. Using differential thermal analysis,
the thermal destruction of rice husk was studied in air and nitrogen media and the initial and final temperatures of the process
were determined. The silica distribution was examined by scanning electron microscopy and infrared spectroscopic techniques. |
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Keywords: | DTA rice husk thermal destruction white and black ash X-ray analysis |
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