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Kordoghli S.,University of Monastir | Kordoghli S.,Ecole des Mines de Nantes | Kordoghli S.,Institute Superieur Des Science Et Technologies Of Lenvironnement Of Borjcedria | Paraschiv M.,Romanian National Institute for Research and Development for Biological Sciences | And 4 more authors.
International Journal of ChemTech Research | Year: 2016

This paper presents the essential features of an efficient and environmentally attractive catalytic pyrolysis for used tyres valorisation with energy recovery. Waste used tyres were catalytically pyrolysed in a batch reactor under atmospheric pressure. The effects of oxides of alkaline-earth metals MgO and CaO uniformly plated on a single layer of graver particles of5-7mm are investigated. Through the experimental tests the variation of pyrolysis products yields, the composition of gases and the heating value of gaseous products at different thermal ranges is highlighted. The obtained results show that, compared with thermal pyrolysis, both oxides increase significantly the amount of gases. Thus MgO generates 32.9% of gas, 27.14% of liquid, 36.8 % of solid residue while the CaO led to 35.2% of gas, 27.5% of liquid, 36.1 % of solid residue. Also, from GC/TCD analysis is was found that, in the range of maximum degradation rate, CaO favours the formation of C2H4, C2H6 and C3H8, but decreases the amount of H2. On the other hand, the use of MgO on graver particle induced a significant increasing of CH4, from 30% to 38%(vol). © 2016, Sphinx Knowledge House. All rights reserved.

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