Optimalization of silicon extraction from husk ashes by excessive magnesium addition on increasing rate of temperature reduction

International Conference on Biomass: Technology, Application, and Sustainable Development

生物科学;能源学;经济学

Sintha, I.^1 ; Dahrul, M.^2 ; Ismawati, S.S.^2 ; Kurniati, M.^3 ; Irmansyah^3 ; Irzaman^3

Biophysics Program, Department of Physics, Bogor Agricultural University, Indonesia^1

Physics Programed, Department of Physics, Bogor Agricultural University, Indonesia^2

Department of Physics, Bogor Agricultural University, Indonesia^3

关键词: FT-IR spectrum;    Magnesium addition;    Rate of increase;    Reduction temperatures;    Silicon extraction;    Spring constants;    Stretching vibrations;    Temperature reduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/65/1/012032/pdf
DOI  :  10.1088/1755-1315/65/1/012032

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

The Silicon can be extracted from rice husk ash by reducing silica with magnesium. In this study the use of Magnesium and Silica was 49:60 with various rate of increase in the reduction temperature (1 °C/minutes, 3 °C/minutes, and 5°C/minutes). It was done in order to obtain silicon with a higher purity than previous studies. The results of EDX showed that the purity silicon with the increase rate of 1 °C/minutes and 5 °C/minutes were 1.78% and 29.39%, respectively. Then, silicon was not formed by increasing rate of 3 °C/minutes. Moreover, XRD results of the samples by using the increase rate of 1 °C/minutes and 5 °C/minutes showed that the pattern correspond to Silicon while the sample with increase rate of 3 °C/min corresponds to Silica. The FTIR spectra indicate the presence of stretching vibration an harmonic for functional groups of Si-O-Si with spring constant for the increase rate of 1 °C/minutes, 3 °C/minutes, and 5 °C/minutes respectively were 977.23 N/m, 1003 N/m, and 982.3 N/m. FTIR result was consistent with EDX and XRD result proving by the existence of Si-O-Si functional group which showed the purity silicon produced was not optimum and presence of OH-functional group indicate that sample contained water.