Oil fly ash constitutes one of the main special types of hazardous waste produced by oil-fired power plants. The current form of disposal in Italy is in hazardous waste landfill; the recovery of metallic components including vanadium is made abroad. Vanadium is the most valuable component for recovery purposes and is required in many industrial sectors including the expanding area of lithium-ion batteries. A new method for the recovery of vanadium from oil fly ash by selective extraction with alkali and conversion to lithium vanadate for use as cathodes in lithium-ion batteries is proposed in this paper. Up to 85% of vanadium contained in oil fly ash has been extracted selectively in about one hour by contacting with NaOH 7M (10 mL g-1) at 90°C. Ammonium trivanadate has been precipitated and calcinated to lithium trivanadate at 450°C. The total time required for the treatment amounts to less than 7 hours and is a promising sustainable alternative to traditional synthesis which require several days and to landfill hazardous wastes disposal.

OIL FLY ASHES AS SOURCES OF LITHIUM VANADATES

PRIMERANO, Patrizia
2012-01-01

Abstract

Oil fly ash constitutes one of the main special types of hazardous waste produced by oil-fired power plants. The current form of disposal in Italy is in hazardous waste landfill; the recovery of metallic components including vanadium is made abroad. Vanadium is the most valuable component for recovery purposes and is required in many industrial sectors including the expanding area of lithium-ion batteries. A new method for the recovery of vanadium from oil fly ash by selective extraction with alkali and conversion to lithium vanadate for use as cathodes in lithium-ion batteries is proposed in this paper. Up to 85% of vanadium contained in oil fly ash has been extracted selectively in about one hour by contacting with NaOH 7M (10 mL g-1) at 90°C. Ammonium trivanadate has been precipitated and calcinated to lithium trivanadate at 450°C. The total time required for the treatment amounts to less than 7 hours and is a promising sustainable alternative to traditional synthesis which require several days and to landfill hazardous wastes disposal.
2012
9788882862695
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/2328208
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact