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PYROLYSIS OF WASTE ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE) FOR RECOVERING METALS AND ENERGY: PREVIOUS ACHIEVEMENTS AND CURRENT APPROACHES
Autori: Peter Hense
Data aparitiei: Iulie / 2015
Revista: Environmental Engineering and Management JournalVol. 14Nr. 7
ISSN: 1843 - 3707
Pret: 25.00 RON    
N.A.

Abstract
The amount of collected Waste Electrical and Electronic Equipment (WEEE) in Europe is growing about 7 wt.-% per year (2007-
2012). It contains a number of economically relevant base, precious and high-tech metals. However, only a limited number of
these metals can be recovered by currently applied recycling processes. Especially high-tech metals like gallium, germanium and
tantalum get lost during the treatment of WEEE. The pyrolysis technology allows an accumulation of these metals from WEEEfractions
without oxidation as well as the generation of high calorific gases and liquids for energetic utilization. This paper
provides a literature based review of lab and medium-scale investigations on pyrolysis processes of different WEEE-fractions
like printed wiring boards (PWB) or plastics to outline opportunities and challenges for recovering critical metals from WEEE
via pyrolysis. The key procedural challenges are dehalogenation, avoidance of highly-toxic emissions (mainly PBDD/F) as well
as preparation and accumulation of metals for recycling processes.



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