A simulation study on the direct carbothermal reduction of SiO2 for Si metal

Hyun Cheol Lee; Sanjay Dhage; M. Shaheer Akhtar; Do Hwan Kwak; Woo Jin Lee; Chong Yeal Kim; O. Bong Yang

doi:10.1016/j.cap.2009.11.053

A simulation study on the direct carbothermal reduction of SiO₂ for Si metal

Hyun Cheol Lee
, Sanjay Dhage
, M. Shaheer Akhtar
, Do Hwan Kwak
, Woo Jin Lee
, Chong Yeal Kim
, O. Bong Yang^*

^*Corresponding author for this work

Department of Science Studies

Research output: Contribution to journal › Journal article › peer-review

31 Scopus citations

Abstract

The direct carbothermal reduction of SiO₂ to Si metal was simulated as a function of mole ratio of SiO₂, SiC and C in the temperature range of 0-3000 °C by using a thermodynamic calculation of Gibb's free-energy minimization. In the SiO₂-C system, the silicon metal was formed from the 1250 °C and completed at 1500-2000 °C with the excess amount of C. By the addition of SiC in SiO₂-C carbothermal reduction system, complete conversion of SiO₂ to Si could be promoted through the lowering the reaction temperature and the excess carbon. Methane gas was efficient reducing agent of SiO₂ to form Si metal at around 2000 °C, while H₂ and CO could not reduce SiO₂ to Si at any conditions. The simulated results were consistent with the experimental works carried out in the arc furnace.

Original language	English
Pages (from-to)	S218-S221
Journal	Current Applied Physics
Volume	10
Issue number	2 SUPPL.
DOIs	https://doi.org/10.1016/j.cap.2009.11.053
State	Published - 2010.03

Keywords

Arc furnace
Carbothermal reduction
Silicon metal
Simulation study

Quacquarelli Symonds(QS) Subject Topics

Materials Science
Physics & Astronomy

Access to Document

10.1016/j.cap.2009.11.053

Cite this

@article{a2acf06facc2481792d1c3c776b83857,

title = "A simulation study on the direct carbothermal reduction of SiO2 for Si metal",

abstract = "The direct carbothermal reduction of SiO2 to Si metal was simulated as a function of mole ratio of SiO2, SiC and C in the temperature range of 0-3000 °C by using a thermodynamic calculation of Gibb's free-energy minimization. In the SiO2-C system, the silicon metal was formed from the 1250 °C and completed at 1500-2000 °C with the excess amount of C. By the addition of SiC in SiO2-C carbothermal reduction system, complete conversion of SiO2 to Si could be promoted through the lowering the reaction temperature and the excess carbon. Methane gas was efficient reducing agent of SiO2 to form Si metal at around 2000 °C, while H2 and CO could not reduce SiO2 to Si at any conditions. The simulated results were consistent with the experimental works carried out in the arc furnace.",

keywords = "Arc furnace, Carbothermal reduction, Silicon metal, Simulation study",

author = "Lee, \{Hyun Cheol\} and Sanjay Dhage and Akhtar, \{M. Shaheer\} and Kwak, \{Do Hwan\} and Lee, \{Woo Jin\} and Kim, \{Chong Yeal\} and Yang, \{O. Bong\}",

year = "2010",

month = mar,

doi = "10.1016/j.cap.2009.11.053",

language = "English",

volume = "10",

pages = "S218--S221",

journal = "Current Applied Physics",

issn = "1567-1739",

number = "2 SUPPL.",

}

TY - JOUR

T1 - A simulation study on the direct carbothermal reduction of SiO2 for Si metal

AU - Lee, Hyun Cheol

AU - Dhage, Sanjay

AU - Akhtar, M. Shaheer

AU - Kwak, Do Hwan

AU - Lee, Woo Jin

AU - Kim, Chong Yeal

AU - Yang, O. Bong

PY - 2010/3

Y1 - 2010/3

N2 - The direct carbothermal reduction of SiO2 to Si metal was simulated as a function of mole ratio of SiO2, SiC and C in the temperature range of 0-3000 °C by using a thermodynamic calculation of Gibb's free-energy minimization. In the SiO2-C system, the silicon metal was formed from the 1250 °C and completed at 1500-2000 °C with the excess amount of C. By the addition of SiC in SiO2-C carbothermal reduction system, complete conversion of SiO2 to Si could be promoted through the lowering the reaction temperature and the excess carbon. Methane gas was efficient reducing agent of SiO2 to form Si metal at around 2000 °C, while H2 and CO could not reduce SiO2 to Si at any conditions. The simulated results were consistent with the experimental works carried out in the arc furnace.

AB - The direct carbothermal reduction of SiO2 to Si metal was simulated as a function of mole ratio of SiO2, SiC and C in the temperature range of 0-3000 °C by using a thermodynamic calculation of Gibb's free-energy minimization. In the SiO2-C system, the silicon metal was formed from the 1250 °C and completed at 1500-2000 °C with the excess amount of C. By the addition of SiC in SiO2-C carbothermal reduction system, complete conversion of SiO2 to Si could be promoted through the lowering the reaction temperature and the excess carbon. Methane gas was efficient reducing agent of SiO2 to form Si metal at around 2000 °C, while H2 and CO could not reduce SiO2 to Si at any conditions. The simulated results were consistent with the experimental works carried out in the arc furnace.

KW - Arc furnace

KW - Carbothermal reduction

KW - Silicon metal

KW - Simulation study

UR - https://www.scopus.com/pages/publications/77949569137

U2 - 10.1016/j.cap.2009.11.053

DO - 10.1016/j.cap.2009.11.053

M3 - Journal article

AN - SCOPUS:77949569137

SN - 1567-1739

VL - 10

SP - S218-S221

JO - Current Applied Physics

JF - Current Applied Physics

IS - 2 SUPPL.

ER -