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

Pore structure of pyrolyzed scrap tires

Zuzana Koreňová, Juma Haydary, Július Annus, Jozef Markoš, and Ľudovít Jelemenský

Institute of Chemical and Environmental Engineering, Slovak University of Technology, Radlinského 9, SK-812 37 Bratislava, Czechslovakia

E-mail: ludovit.jelemensky@stuba.sk

Received: 24 April 2007  Revised: 4 September 2007  Accepted: 9 September 2007

Abstract: Internal structure of carbon black produced by pyrolysis (CBp) of rubber samples from the top and bottom parts of sidewall and tread of a passenger car tire was investigated in nitrogen flow at different temperatures. The pore structure (specific surface area, pore size distribution, and porosity) of CBp and commercial CB, was compared. The development of pore structure and the increase of the specific surface area were most intensive during the thermal decomposition at temperatures ranging from 300°C to 500°C. This is caused by the intensive release of volatiles during the pyrolysis. After the pyrolysis was finished, at temperatures above 500°C, further decomposition of solid matter was associated with a slight increase of the specific surface area.

Keywords: pyrolysis - tire - internal structure - specific surface area

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-007-0083-7

Chemical Papers 62 (1) 86–91 (2008)