Abstract
This work reports a kinetic analysis of tire tread and sidewall char in a thermogravimetic analyzer between 850°C and 1100°C to determine intrinsic kinetic parameters between 10 and 60% conversion. Experimental data was modeled using the volumetric, grain and random pore model, the random pore model described the reactions best and activation energy was found to be 116 and 130kJ/mol for tire tread and sidewall respectively. The onset for diffusion control was observed at 925-950°C for both samples. An increase in tire proportion was shown to decrease coal reactivity during co-gasification at different tire proportion and it was demonstrated that tire tread and sidewall are similar in gasification behavior save the inhibition effect caused by residual ash on tread at high conversions. The reactivity of both tire tread and side wall was lower than that of coal but almost equal therefore, this does not justify separation of tire components prior to gasification.
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