. "Appendix D: Environmental Considerations for Photovoltaics." The Power of Renewables: Opportunities and Challenges for China and the United States. Washington, DC: The National Academies Press, 2010.
The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
The Power of Renewables: Opportunities and Challenges for China and the United States
FIGURE D-1 Flow sheet of the modified Siemens process.
Preparation and Purification of Trichlorosilane (SiHCl3)
High purity SiHCl3 is prepared from quartz sand. The steps are as follows.
Preparation of industrial silicon: SiO2 + C → Si + CO2↑.
Preparation of SiHCl3: Si + HCl → SiHCl3 + H2↑, which produces a gas mixture of H2, HCl, SiHCl3, SiCl4, and Si.
