Kinetic modelling of tyre pyrolysis in a conical spouted bed reactor

✍ Scribed by Martin Olazar; Gartzen Lopez; Miriam Arabiourrutia; Gorka Elordi; Roberto Aguado; Javier Bilbao

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 482 KB
• Volume: 81
• Category: Article
• ISSN: 0165-2370
• DOI: 10.1016/j.jaap.2007.09.011

✦ Synopsis

A novel kinetic model has been proposed for the thermal pyrolysis of tyres. The model is based on a reaction scheme that considers an intermediate lump and parallel reactions for the formation of the different product lumps. Seven lumps have been taken, which are gas (C 4 ), nonaromatic liquid (C 5 ÀC), aromatics (C), tar (C 11+ ), char (low grade carbon black), intermediate and the original tyre. The kinetic data have been obtained in a pilot plant provided with a conical spouted bed reactor. The inert gas used is nitrogen and the temperature has been varied from 425 to 610 8C. Discontinuous runs have been carried out for obtaining the kinetic data, and the product stream has been analysed on-line at different reaction times, thereby monitoring the evolution with time of mass fraction of the different components. The kinetic model gives reasonable predictions for lump yields.