Abstract

• In this paper, the effect of the different calcinating temperature of rice husk ash (RHA) was studied. Especially the silica content in the RHA was investigated. Rice Husk was collected from rice milling plants of Hlae Gu township, Yangon Region and Pathein township, Ayeyarwaddy Region. For obtaining the pure rice husk, the sieve analysis was done for removing the sand and other impurities. After that the RHA is obtained by calcinating of rice husk at 500 C, 600C, 700C and 800C respectively for two hours. After that the calcined mass of the different RHA samples was weighted by electronic scientific balance. It was shown that the decreases in mass with increasing calcinating temperature from 500C to 800C. Then, each calcinated samples were taken for EDXRF analysis to measure the elemental concentration. According to the results, it was found that the major element, silicon (Si) was contained nearly 80% in each sample at different temperature. The formed rice husk ash is treated with Sodium hydroxide (NaOH) and Hydrochloric acid (HCl) to produce silica. The percentage of extracted silicon lies around 60 %.