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Chemisches und mechanisches Recycling von Kunststoff und -gemischen

Description: Das Projekt "Chemisches und mechanisches Recycling von Kunststoff und -gemischen" wird vom Umweltbundesamt gefördert und von Universität Karlsruhe, Institut für Chemische Technik durchgeführt. Three EU and two CCE countries start a collaboration to evaluate, test and further develop the practical knowledge on the pyrolysis of post-consumer plastic waste, including plastic and plastic/metal composite waste. In this proposal chemical (pyrolytic) and mechanical (compatibilizing) methods are tested for recycling plastics, especially mixtures and composites that cannot be reprocessed by simpler methods. The project is structured according to a number of tasks, each of which is tackled by a partner with previous experience in the field and aided by the entire team. Task 1 is basically a logistic, technical and economic evaluation of plastics recycling by pyrolytic methods and discusses a number of practical problems to be tackled under task 2, the experimental part of the project. Task 2.1 is devoted to the effect on pyrolysis of providing mixed rather than individual plastic types, such as accelerated decomposition of PA 6 as a consequence of HCl-evolution from PVC. A major aim is the development and assessment of a process, in which a plastic mixture is decomposed sequentially,either as it is, or after addition of a catalytic substance. Task 2.2 systematically screens additives for their potential effect on rate and product composition, as well as on the generation of undesirable substances, such as dioxin precursors or coke forming catalysts. Task 2.3 studies carbon formation from single and mixed plastics, its enhancement by specific additives, e.g. carbon black or metal residues, or coke formed in the pyrolyses process proper. Task 2.4 considers the effect of ageing, which may lead int. al. to the presence of peroxides and affecting viscosity, cross-linking and the decomposition process and products at large. Task 2.5 looks at the decomposition of PET and possibly other materials that have a potential of creating problems during the operation of a pyrolytic industrial unit. Task 2.6 addresses the fate of heteroatoms during pyrolysis, in particular the possible ways to eliminate chlorine (and bromine) from the system. Task 2.7 is basically mechanical recycling, studied on the basis of binary mixtures separable from mixed plastics by simple means. The non-miscible plastics are compatibilized by the addition of suitable copolymers or by reactive cross-linking. Task 3 is the modelling and optimization of idealized industrial reactor types and the testing of the quality of pyrolytic products and compatibilized polymer blends. Task 4 prepares the transition of the pre-industrial research contained in this project to industrial practice. It will be further defined during the Meetings of the Project Team and the ad hoc working groups of APME, the Association of Plastic Manufacturers in Europe.

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SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Kunststoffrecycling ? Mechanisches Recycling ? Karlsruhe ? Dioxin ? Polyethylenterephthalat ? Recycling ? Kunststoff ? Brom ? Peroxid ? Polyvinylchlorid ? Katalysator ? Koks ? Kunststoffabfall ? Polymer ? Zusatzstoff ? Blei ? Abfallbehandlung ? Industrieruß ? Mischkunststoff ? Metall ? Pyrolyse ? Mechanisches Verfahren ? Rezyklat ? Vorläufersubstanz ? Chemikalien ? Reaktor ? Nassverfahren ? Stoff ? Modellierung ? Chemisches Verfahren ? Europa ? Studie ? Ökonomische Bewertung ? Viskosität ?

Region: Baden-Württemberg

Bounding box: 9° .. 9° x 48.5° .. 48.5°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

Time ranges: 1997-02-01 - 2000-01-31

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