|Title||Steam gasification of waste tyre: Influence of process temperature on yield and product composition|
|Publication Type||Articolo su Rivista peer-reviewed|
|Year of Publication||2013|
|Authors||Portofino, Sabrina, Donatelli Antonio, Iovane Pierpaolo, Innella C., Civita R., Martino Maria, Matera D.A., Russo A., Cornacchia G., and Galvagno S.|
|Keywords||article, carbon, Carbon dioxide, Carbon monoxide, Chemical composition, Chemical elements, concentration (composition), Continuous furnaces, Elemental compositions, Ethylene, experimental study, gas flow, Gases, Gasification, Gasification with steam, High temperature, Hot Temperature, Hydrogen, Hydrogen concentration, Metallurgical furnaces, methane, motor vehicle tire, Oxygen, pressure, priority journal, Recycling, Refuse Disposal, Rubber, solid waste, Solid-gas phase reactions, Steam, Steam gasification, Syn-gas, Synthesis gas, Temperature, Tires, Waste tyres, Water vapor|
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.
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