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The principle of refining precious metals from photovoltaic panels

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The principle of refining precious metals from photovoltaic panels [PDF]

6 FAQs about [The principle of refining precious metals from photovoltaic panels]

Why is the photovoltaic industry considering recycling PV modules?

The photovoltaic industry is considering options of recycling PV modules to recover metals such as Si, Ag, Cu, Al, and others used in the manufacturing of the PV cells. This is to retain its “green” image and to comply with current legislations in several countries.

How do materials recovery treatments differ based on PV technology?

Furthermore, the materials recovery treatments often differ radically, based on the specific PV technology. The materials recovering ways proposed in the scientific literature include mechanical, thermal and chemical treatments for the valuable materials recovery.

What is the metal recovery from PV treatment?

The metal recovery from this process is around 94-99 % (Lenka Muchova, 2011). 5. Incineration of cable polymers The polymers of cables from the cable treatment are assumed to be incinerated with energy recovery. 6. Glass separation The objective of this process is to separate glass from the PV sandwich.

What is the silicon metal recovery rate in crystalline-silicon based PV technology?

The silicon metal recovery rate in the process is assumed to be 95 %. The recovered silicon metal scrap from the treatment is assumed to substitute MG silicon metal thereby avoiding the environmental impacts related to its production. In crystalline-silicon based PV technology, silver is utilised for the metallisation of the modules.

What metals can be recovered from photovoltaic modules?

Recovering valuable metals such as Si, Ag, Cu, and Al has become a pressing issue as end-of-life photovoltaic modules need to be recycled in the near future to meet legislative requirements in most countries. Of major interest is the recovery and recycling of high-purity silicon (>99.9%) for the production of wafers and semiconductors.

What materials can be recycled for photovoltaic panels?

In the case of aluminium, copper and silver, the expected recovered/recycled materials are assumed to substitute primary materials. The recovered solar glass is assumed to be down-cycled into glass for packaging; electronic-grade silicon metal used in photovoltaic panels is assumed to be recovered as MG silicon metal with lower purity.

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