This work has focused on car fluff recycling by meaning of separation techniques followed by pyrolysis. The main goals were sieving and floatation pre-treatment techniques testing and ASR conversion in oils and gases suitable for further refining as chemical building blocks, biodiesel or, at least, fuels. Pre-treatment tests revealed floatation to be a good method to sort polymers form the multi-material matrix, while sieving revealed to be not the optimal solution. In fact, fines (which accounts for an half of the total mass once sieved) present a cracking behaviour that is the same of the coarser fraction. Polymers and light components account for a 40% of the total raw mass and 25% of the fine fraction. Pyrolysis of the Raw ARS sample revealed a close to 20% conversion while floated samples produces more than 50% oils and around 10% gases, thus reaching almost 60% total useful conversion. A further floatation with water, separating foam rubber and polyolefin, increases pyrolysis yield of another 10%. Moreover, a sample consisting only of polyolefin reached 90% conversion revealing polyolefin to be particularly suitable for chemical recycling applications, thus a good material to use in cars when applying design for recycling criteria. Innovative recycling techniques will be important tools to reach ELV Directive targets in 2015, since a further 5% recycling rate is needed and because at present many studies focus on ASR energy recovery while material recycling target seems to be the hardest one to reach with current separation and recycling technologies. Moreover, eco-design effects are not expected in the short run. Thus, improving yield, obtaining lighter products and reducing solid residues and costs are still open challenges in which catalysers can play a key role. This study has revealed that reaching ELV directive recycling target is possible, thus further studies must be performed in this direction. A great innovation is expected in the next years due to the 85% recycling rate threshold approaching and chemical recycling is a strong candidate to do research on.
A Santini, L Morselli, F Passarini, I Vassura, D Serrano, J Doufour (2010). Pyrolysis of floated Auto Shredder Residue fractions. VENICE : IWWG.
Pyrolysis of floated Auto Shredder Residue fractions
SANTINI, ALESSANDRO;MORSELLI, LUCIANO;PASSARINI, FABRIZIO;VASSURA, IVANO;
2010
Abstract
This work has focused on car fluff recycling by meaning of separation techniques followed by pyrolysis. The main goals were sieving and floatation pre-treatment techniques testing and ASR conversion in oils and gases suitable for further refining as chemical building blocks, biodiesel or, at least, fuels. Pre-treatment tests revealed floatation to be a good method to sort polymers form the multi-material matrix, while sieving revealed to be not the optimal solution. In fact, fines (which accounts for an half of the total mass once sieved) present a cracking behaviour that is the same of the coarser fraction. Polymers and light components account for a 40% of the total raw mass and 25% of the fine fraction. Pyrolysis of the Raw ARS sample revealed a close to 20% conversion while floated samples produces more than 50% oils and around 10% gases, thus reaching almost 60% total useful conversion. A further floatation with water, separating foam rubber and polyolefin, increases pyrolysis yield of another 10%. Moreover, a sample consisting only of polyolefin reached 90% conversion revealing polyolefin to be particularly suitable for chemical recycling applications, thus a good material to use in cars when applying design for recycling criteria. Innovative recycling techniques will be important tools to reach ELV Directive targets in 2015, since a further 5% recycling rate is needed and because at present many studies focus on ASR energy recovery while material recycling target seems to be the hardest one to reach with current separation and recycling technologies. Moreover, eco-design effects are not expected in the short run. Thus, improving yield, obtaining lighter products and reducing solid residues and costs are still open challenges in which catalysers can play a key role. This study has revealed that reaching ELV directive recycling target is possible, thus further studies must be performed in this direction. A great innovation is expected in the next years due to the 85% recycling rate threshold approaching and chemical recycling is a strong candidate to do research on.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
