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Gewählte Master / Diploma Thesis:

Josef Holzweber (2018): Rating of fuels produced by pyrolysis of decentralized plastic waste.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 101. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
Increasing production of plastic products causes many problems like accumulation of plastic in landfills and environmental problems. High workload of plastic recycling make plastic recycling less sustainable. (ANUAR et al., 2016) An alternative to recycling and burning of plastic is pyrolysis of plastic. At this process the waste plastic is heated to several hundred degrees Celsius at anaerobic conditions, which leads to a degradation and depolymerization of plastics (MARTENS, 2011). In this master thesis, the pyrolysis products of plastic mixtures (PP, LD-PE, HD-PE, PVC, PUR, PET and PS) and of sea plastic are evaluated. The plastic samples are pyrolyzed at different pyrolysis temperatures between 344 °C and 615 °C in a batch reactor. The aim is to optimize the production of fuel-like products. Pyrolysis temperatures under 400 °C do not lead to a satisfying yield and the product itself is not fuel-like. At a pyrolysis temperature of about 400 °C and upwards a solid and high boiling product fraction is produced, which can block pipes and vessels. With increasing pyrolysis temperature this product fraction is more and more degraded. The analysis of density, pour point, flash point and distillation characteristics show that the characteristics of the pyrolyzed plastic mixture become more similar to the characteristics of petrol and diesel the higher the pyrolysis temperature is. The products of the pyrolysis experiments are waxy and pasty and need to be distilled to get a fuel-like product. The distillation characteristics show that after pyrolysis of the plastic mixture at 615 °C and distillation at 250 °C a total product yield of 41.6 % (w/w) purified oil can be expected in a batch system. The actual pyrolysis product after distillation is fuel-like, transparent and clear and does not contain visible impurities.

Beurteilende(r): Pfeifer Christoph
1.Mitwirkender: Tondl Gregor

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