Cradle to Gate
Identity ID
9d58a4ce-5fc2-45e3-b59f-1e0cf5164f1e
Materials
Associated ID
e30bae76-4293-438e-8ff9-2134feb472c5
Included activities starts
Included activities ends
Description
Solar-grade high-purity polycrystalline silicon, derived from metallurgical-grade silicon, is purified to a purity exceeding 99.9999% and used in the photovoltaic industry. If you are uncertain about the manufacturing process of high-purity polycrystalline silicon, you may use this dataset. The dataset is a weighted average of the following datasets: "High-purity multi-Si, modified Siemens method, solar grade" and "High-purity multi-Si, silane fluidized bed method, solar grade". For specific technical details, system boundaries, and related information, please refer to the individual production datasets for each high-purity polycrystalline silicon process.
Activity Description
The improved Siemens process includes steps such as trichlorosilane synthesis, distillation and purification of trichlorosilane, hydrogen reduction of trichlorosilane, tail gas recovery, and hydrogenation separation of silicon tetrachloride; the silane fluidized bed method involves a process flow including alkaline water electrolysis for hydrogen production, hydrogen purification, cold hydrogenation, silane preparation, granular silicon fluidized bed, and post-treatment.
Process Description
Solar-grade high-purity polycrystalline silicon, purified from metallurgical-grade silicon, achieves a purity level exceeding 99.9999% and is used in the photovoltaic industry.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology