The risk of defluidization during the low-temperature pyrolytic processes of polyolefins is one of the major constraints to a wider utilization of fluidized beds for the pyrolysis of plastic wastes. A predictive model can estimate the occurrence of defluidization under different operating conditions, taking into account the role of physical properties of the polymers and hydrodynamic variables of the reactor, together with that of the main operating parameters, like the process temperature and the plastic waste feed rate. The results agree well with the experimental data obtained by feeding recycled polypropylene and polyethylene in a laboratory-scale bubbling fluidized-bed pyrolyzer. An operating map allows to distinguish the region of reactor stable operation from that of defluidization.
Fluidized-bed pyrolysis of polyolefins wastes: Predictive defluidization model
MASTELLONE, Maria Laura;ARENA, Umberto
2002
Abstract
The risk of defluidization during the low-temperature pyrolytic processes of polyolefins is one of the major constraints to a wider utilization of fluidized beds for the pyrolysis of plastic wastes. A predictive model can estimate the occurrence of defluidization under different operating conditions, taking into account the role of physical properties of the polymers and hydrodynamic variables of the reactor, together with that of the main operating parameters, like the process temperature and the plastic waste feed rate. The results agree well with the experimental data obtained by feeding recycled polypropylene and polyethylene in a laboratory-scale bubbling fluidized-bed pyrolyzer. An operating map allows to distinguish the region of reactor stable operation from that of defluidization.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
