Journal
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
Volume 89, Issue 3, Pages 809-814Publisher
SPRINGER
DOI: 10.1007/s10973-007-8294-2
Keywords
DTA; rice husk; thermal destruction; white and black ash; X-ray analysis
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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 alpha-cristobalite at 850 degrees 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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