Thermal and thermo-catalytic degradation of polyolefins as a simple and efficient method of landfill clearing

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Thermal and thermo-catalytic degradation of polyolefins as a simple and efficient method of landfill clearing

Thermal degradation of the low density polyethylene (LDPE), polypropylene (PP) and the municipal waste plastics was investigated. The thermo-catalytic degradation of LDPE and PP was studied in the presence of the following catalysts: four different types of montmorillonite: K5, K10, K20, K30 and - for comparison - zeolites (natural - clinoptilolite, YNa+ and YH+). Thermal analyses TG-DTA-MS of polymers and polymer-catalyst mixtures were carried out in an argon flow atmosphere in isothermal and dynamic conditions. The following order was found: in lowering the reaction temperature for LDPE degradation YH+ > mK5 > mK20 = mK30 >mK10 > NZ > YNa+; for PP degradation: mK20 > mK5 = mK30 >mK10 > YH+ > NZ > YNa+. The activity tests were carried out in a stainless steel batch reactor under atmospheric pressure in a wide temperature range of up to 410°C, and using the atmosphere of argon flow. The liquid products were analysed by the GC-MS method. The hydrocarbons in the liquid products from thermal degradation of polymers were broadly distributed in the carbon fractions of C8 to C26 - for LDPE and C6 to C31 for PP.

PlasticsEurope. (2009, October). The Compelling Facts About Plastics 2009. An analysis of European plastics production, demand and recovery for 2008. Retrieved November 3. 2009, from

Rabek, J. F. (2008). Contemporary knowledge of polymers. Warszawa, Polska: Wydawnictwo Naukowe PWN (in Polish).

Mucha, M. (2002). Polymers and ecology. Łódź, Polska: Wydawnictwo Politechniki Łódzkiej (in Polish).

Tomaszewska, K. & Jóźwiak, W. K. (2009). Aluminosilicates in thermo-catalytic degradation of low density polyethylene, Pol. J. Environ. Stud. 18 1B, 232-236.

Pielichowski, K. & Njugana, J. (2005). Thermal degradation of polymeric materials. Shawbury, United Kingdom: Rapra Technology Limited.

Reverte, C., Dirion, J. L. & Cabassud, M. (2007). Kinetic model identification and parameters estimation from TGA experiments. J. Anal. Appl. Pyrolysis 79, 297-305. DOI: 10.1016/j.jaap.2006.12.021.

Abate, L., Blanco, I., Pollicino, A. & Recca, A. (2002). Determination of degradation apparent activation energy values of polymers Regression of kinetic parameters derived from TG data. J. Therm. Anal. Calorim. 70, 63-73.

Polish Journal of Chemical Technology

The Journal of West Pomeranian University of Technology, Szczecin

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