DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF PURE SILICA FROM RICE HUSKS
Abstract
This study aims to develop a new method of obtaining high-quality pure silicon oxide from rice husk from different regions of Kazakhstan. The proposed method is environmentally friendly and uses a significant amount of inorganic alkalis and acids described in the literature, and is compared with the method of direct combustion. To minimize environmental impact, the mineral acid phase was removed or replaced with organic acid in a pretreatment. Based on the thermo-gravimetric analysis, the calcination temperature of 600°C was chosen. The average purity of the silica samples obtained by various methods ranged from 84.5 to 99.66 %. When using the ecological method, the purity of silicon oxide was high, and the surface area reached 625 m2/g. Key words: rice husk, hydrochloric acid, silicon, silicon oxide, BET.
About the Authors
K. . Askaruly
Satbayev University
Kazakhstan
Kazakhstan
S. . Azat
Al-Farabi Kazakh National University
Kazakhstan
Kazakhstan
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Review
For citations:
Askaruly K., Azat S. DEVELOPMENT OF TECHNOLOGY FOR PRODUCTION OF PURE SILICA FROM RICE HUSKS. Soil Science and Agrichemistry. 2019;(2):92-102. (In Russ.)
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