Cradle to Gate
Identity ID
d42b6a4c-7dca-4f00-91e4-995d494c80e8
Materials
Associated ID
76788140-8130-4dd5-bbfa-60e49a22bc95
Included activities starts
Included activities ends
Description
High-purity polycrystalline silicon with a purity of over 99.9999% is used in the production of solar cells. This dataset includes material inputs, energy consumption, waste, and air emissions associated with production and environmental protection processes (such as slurry treatment, waste gas treatment, and wastewater treatment). Infrastructure such as equipment manufacturing and facility construction is not included within the system boundary of the dataset. The life cycle inventory was compiled from multiple data sources. The process flow for producing granular silicon via the silane fluidized bed method includes hydrogen production via water electrolysis, hydrogen purification, hydrogen drying and regeneration, cold hydrogenation, silane production, granular silicon fluidized bed reactor, and post-treatment processes.
Activity Description
The production process of granular silicon includes steps such as hydrogen production via water electrolysis, hydrogen purification, hydrogen drying and regeneration, cold hydrogenation, silane preparation, granular silicon fluidized bed, and post-processing.
Process Description
High-purity polycrystalline silicon, derived from metallurgical-grade industrial silicon and purified through physical or chemical methods to a purity of over 99.9999%, is used in the manufacture of solar cells.
Time period
2021
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The core of the silane fluidized bed process for producing granular silicon is the direct decomposition of silane gas (SiH4) in a fluidized bed reactor into granular polycrystalline silicon product. The production process includes key steps such as alkali electrolysis of water for hydrogen generation, hydrogen purification, hydrogen drying and regeneration, cold hydrogenation, silane preparation, granular silicon fluidized bed, and post-treatment.