COMPARATIVE STUDY OF THE YELD ACCORDING TO THE OPERATING CONDITIONS OF THE PYROLYSIS OF PLASTIC FILM WASTE FROM FOOD PACKAGING

chemical engineering

Pyrolysis is a thermochemical decomposition of an organic material at high temperature and in the absence of oxygen, making it possible to obtain three main products obtained: a mixture of non-condensable light gases, a mixture of hydrocarbons in liquid and the solid residue named coal. The study at the laboratory scale of the mass yield of the products of the pyrolysis of food packaging waste in plastic films shows that the proportion of each fraction depends on the nature of the plastic film waste, as well as on the process conditions on the evolution of the temperature as a function of time and the final temperature. The results obtained lead us to evaluate that the presence of metal compounds in the waste films constitutes a catalyst which disadvantages the production of pyrolytic oil allowing the majority of non-condensable gases to be obtained, i.e., 88% in maximum value, while those not metallics give 62% better oil yield. The difference in the yield of the solid residue between transparent film waste (3% to 4%) and printed-metallized film waste (7% to 9%) highlight the mineral materials resulting from coloring and printing inks as well as the compounds metallic.

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