Title
Thermal and catalytic degradation of grape seeds/polyethylene waste mixture
Authors
MIHAI BREBU JALE YANIK TUGCE UYSAL and CORNELIA VASILE

Received August 19, 2013
Published Volume 48 Issue 7-8 July-August
Keywords grape seeds, polyethylene, organic waste, co-pyrolysis, Red Mud, FCC, catalysts

Abstract
Thermal degradation of grape seeds alone and mixed with polyethylene was studied by TG-MSD and by pyrolysis at 500 °C, followed by GC-MSD analysis of liquid products. The maximum degradation rate was found at 390 °C for grape seeds and at 475 °C for polyethylene. Interactions are possible between the two materials or their degradation products at co-pyrolysis, with an effect on product yield. The main components of pyrolysis oils from grape seeds are fatty acids, followed by lignin-derived compounds. Light carboxylic acids, homologous series of paraffins and olefins and benzene derivatives were also identified. The effect of Red Mud and FCC catalysts on the thermal behaviour and on the pyrolysis yield was tested in liquid and vapour phase contact mode. They enhanced the degradation and changed the product yield.