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Recovery of Paper Fibers From TetraPak® Packaging: Material and Energetic Valorization of the Remaining Fraction

[+] Author Affiliations
Alexandra Castro, Cândida Vilarinho, Joana Carvalho

CVR - Centre for Waste Valorization, Guimarães, PortugalUniversity of Minho, Guimarães, Portugal

Jorge Araújo

CVR - Centre for Waste Valorization, Guimarães, Portugal

Paper No. IMECE2014-38880, pp. V014T11A025; 6 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 14: Emerging Technologies; Engineering Management, Safety, Ethics, Society, and Education; Materials: Genetics to Structures
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4963-7
  • Copyright © 2014 by ASME


In this study, a methodology was developed for the treatment/valorization of all the constituent fractions of TetraPak ®, proposing pyrolysis technology for the recycling of plastic and aluminum fraction, resulting in the recovery process of the paper fibers. In percentage these three elements are distributed approximately as follows: 70% of cardboard (kraft paper), 25% of low-density polyethylene (LDPE) and 5% of aluminum foil [1, 2, 3, 4]. It was developed an integrated and innovative methodology that starts with the recovery of the paper fibers, which must reintegrate the production cycle of the packaging company. Followed by the valorization of the remaining fraction, this fraction consists in plastic and aluminum, and is valorized through a pyrolysis process. The pyrolysis process is an irreversible chemical modification of compounds by the action of heat and in the absence of oxygen. This technology are used for energy recovery, which causes thermal degradation of the compounds in anoxic environment, and is therefore considered an environmentally friendly technology and it is considered one of the alternative routes for treatment of waste TetraPak ® packaging [4]. The pyrolysis tests were carried out in laboratory reactor at different temperatures (between 300 and 500°C). At the end of this process the aluminum was recovered and it was produced a synthesis gas with added value. This produced gas was constituted by CO, H2, CO2 e CH4 with maximum values recorded of 5000, 3200 e 7.5 ppm e 40%, respectively. The laboratory test were confirmed by the analysis of the thermal behavior by DTA/TGA and it was confirmed that the temperature of 500°C is the most indicated for energetic valorization of the aluminum, paper and plastic fraction.

Copyright © 2014 by ASME
Topics: Fibers , Packaging



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