Study of the early deactivation in the catalytic pyrolysis of polymers

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Title: Study of the early deactivation in the catalytic pyrolysis of polymers
Authors: Marcilla, Antonio | Gómez-Siurana, Amparo | Berenguer Muñoz, Deseada
Research Group/s: Procesado y Pirólisis de Polímeros
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química
Keywords: Catalytic pyrolysis | Early stage | MCM-41 | Polymers
Knowledge Area: Ingeniería Química
Issue Date: May-2006
Abstract: The fast growth of the range of applications of plastics: packaging, agriculture, construction, household, etc. has turned to these materials in the a environmental problem since plastics comprise 10 wt% (>30 vol%) of municipal solid waste. Pyrolysis is one of the promising alternatives to dumping or incineration for the treatment of plastic wastes, where the polymer sample is heated in an inert atmosphere causing the cracking of the polymer backbone. The study of the catalytic pyrolysis of polymers using thermogravimetric analysis (TGA) shows a premature beginning of the process for some polymer-catalyst systems, that provokes a widening of the corresponding peaks in the derivative of TGA curves (DTG curves), and in some cases, the appearance of a shoulder [1]. This premature beginning of the decomposition’s reactions would be related to the acid sites located on the surface of the material [2,3]. The main objective of this work is to carry out a study detailed of such a phenomenon. In this way, TGA studies were carried out, and four cycles of heating-cooling were performed in order to analyse the influence of the first stages of decomposition over the activity of the involved active sites. Three polymers (Polyethylene, PE, polypropylene, PP and an ethylene-vinyl acetate copolymer, EVA) were selected, and MCM-41 was used as a catalyst. The behaviour of polymer-catalyst mixtures (20% w/w of catalyst) was studied and compared with the observed in the corresponding thermal degradation as well as in the conventional catalytic pyrolysis.
Description: Presentado como póster en el 17th International Symposium on Analytical and Applied Pyrolysis, Budapest, mayo 2006. Resumen publicado en el libro de actas del congreso.
Sponsor: "Comisión de Investigación Científica y Tecnológica” de la Secretaría de Estado de Educación, Universidades, Investigación y Desarrollo y Comunidad Europea (FEDER refunds) (CICYT CTQ2004-02187).
Language: eng
Type: Other
Peer Review: si
Appears in Collections:INV - GTP3 - Comunicaciones a Congresos

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