EXTRACTION OF SILICON FROM RICE HUSK ASH BY MAGNESIOTHERMIC REDUCTION
Indonesia has a great potential of solar energy which can be utilized by using solar cells. Solar cells can be made from high-purity silicon. Silicon is usually made from silica sand through extraction techniques at high temperatures. Silicon can also be produced from rice husk ash through the re...
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| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/41036 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Indonesia has a great potential of solar energy which can be utilized by using solar
cells. Solar cells can be made from high-purity silicon. Silicon is usually made from silica
sand through extraction techniques at high temperatures. Silicon can also be produced from
rice husk ash through the reduction process. Rice husk ash contains high purity silica, which
is about 87% to 97%, depends on the production process. This final project aimed to
observing the effect of KMnO4 treatment on purity of produced silicon by varying leaching
temperatures.
In this study, we use rice husk ash from the market. We purify the ash using HCl
solution at two different temperatures, i.e. 70 oC and 90 oC. The purified ash is then treated
with KMnO4 solution at various concentrations. Magnesiothermic reduction process was
then carried at temperature of 700 oC for one hour in ambient environment. The products
was leached using two different solutions consist of HCl, HF and CH3COOH. We utilize
XRD to identify the crystal structures on the products. It’s shown that purification of rice
husk ash at 90 oC produced high purity silicon about 94%. KMnO4 treatment of 0.1M
concentration enhance the silicon content on products |
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