ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Kinetics of pyrolysis and properties of carbon black from a scrap tire

Z. Koreňová, M. Juma, J. Annus, J. Markoš, and Ľ. Jelemenský

Institut of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, SK-812 37 Bratislava, Slovakia

E-mail: ludovit.jelemensky@stuba.sk

Received: 21 April 2006  Revised: 14 June 2006  Accepted: 9 July 2006

Abstract: The pyrolysis of rubber from the sidewall and tread of a passenger car tire was carried out in a nitrogen flow at a wide range of final temperatures. Derivative thermogravimetric analysis (DTG) was applied to examine the kinetics at the different process conditions of completed pyrolysis. Two characteristic stages were observed in the DTG curves. The first stage corresponded to the decomposition of processing oil, plastifier, and additives, whereas the rubber polymer was decomposed in the second stage. Several properties of the carbon black formed by the pyrolysis such as ash content, specific surface area, and pore size distribution were determined. A change of the internal structure of the rubber particle in the meso-and macroregions of the pore size was observed.

Keywords: carbon black - pyrolysis - scrap tire - kinetics - pore size - DTG analysis

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-006-0077-x

Chemical Papers 60 (6) 422–426 (2006)