The main problems related to the traditional treatment methods
of WEEEs are complexity of the waste and presence of additives
of various chemical compositions.
They also usually end to a polymer fraction with deteriorated properties and limited end uses.
Thermal cracking (pyrolysis) of WEEE streams is receiving
increasing attention, due to the potential recovery of either
monomer(s) or secondary valuable materials, leading to a more
sustainable waste management.
Disadvantages of pyrolysis are
related to the variable product composition and the low selectivity
concerning the respective monomers and/or products of commercial
value.
The use of suitable catalysts in the pyrolysis
process can offer the possibility to control the selectivity towards
the desired products.