title: Steam gasification of waste tyre: influence of process temperature on yield and product composition.
abstract: 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.
authors: UTTP NANO - C.R. ENEA Portici, P.le E. Fermi, 1 Loc. Granatello, 80055 Portici (NA), Italy. sabrina.portofino@enea.it
authors: Sabrina
authors: S
authors: Portofino
authors: Antonio
authors: A
authors: Donatelli
authors: Pierpaolo
authors: P
authors: Iovane
authors: Carolina
authors: C
authors: Innella
authors: Rocco
authors: R
authors: Civita
authors: Maria
authors: M
authors: Martino
authors: Domenico Antonio
authors: DA
authors: Matera
authors: Antonio
authors: A
authors: Russo
authors: Giacinto
authors: G
authors: Cornacchia
authors: Sergio
authors: S
authors: Galvagno
mesh_terms: D002244:Carbon; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D005740:Gases; D006358:Hot Temperature; D006859:Hydrogen; D008697:Methane; D011312:Pressure; D012037:Refuse Disposal / Q000379:methods*; D012408:Rubber; D062611:Solid Waste; D013227:Steam
chemical_list: D005740:Gases; D062611:Solid Waste; D013227:Steam; D002245:Carbon Dioxide; D002244:Carbon; D002248:Carbon Monoxide; D006859:Hydrogen; D012408:Rubber; D008697:Methane