An experimental survey of waste tyre gasification with steam as oxidizing agent has been conducted in a continuous bench scale reactor, with the aim of studying the influence of the process temperature on the yield and the composition of the products; the tests have been performed at three different temperatures, in the range of 850-1000 °C, holding all the other operational parameters (pressure, carrier gas flow, solid residence time). The experimental results show that the process seems promising in view of obtaining a good quality syngas, indicating that a higher temperature results in a higher syngas production (86. wt%) and a lower char yield, due to an enhancement of the solid-gas phase reactions with the temperature. Higher temperatures clearly result in higher hydrogen concentrations: the hydrogen content rapidly increases, attaining values higher than 65% v/v, while methane and ethylene gradually decrease over the range of the temperatures; carbon monoxide and dioxide instead, after an initial increase, show a nearly constant concentration at 1000 °C. Furthermore, in regards to the elemental composition of the synthesis gas, as the temperature increases, the carbon content continuously decreases, while the oxygen content increases; the hydrogen, being the main component of the gas fraction and having a small atomic weight, is responsible for the progressive reduction of the gas density at higher temperature. © 2012 Elsevier Ltd.
All Science Journal Classification (ASJC) codes
- Waste Management and Disposal
Portofino, S., Donatelli, A., Iovane, P., Innella, C., Civita, R., Martino, M., Matera, D. A., Russo, A., Cornacchia, G., & Galvagno, S. (2013). Steam gasification of waste tyre: Influence of process temperature on yield and product composition. Waste Management, 33(3), 672 - 678. https://doi.org/10.1016/j.wasman.2012.05.041