32204 20170503134901.0 doi 10.1016/j.cej.2014.03.055 sideral 86683 ART-2014-86683 eng (orcid)0000-0002-8704-9274 Gil-Lalaguna, N. Air-steam gasification of sewage sludge in a fluidized bed. Influence of some operating conditions 2014 Access copy available to the general public Unrestricted An experimental work was carried out to investigate the viability of energy recovery from the air–steam gasification of sewage sludge. The relative influence of different factors, as well as the effect of their possible interactions, has been determined by means of analysis of variance. Temperature was found to be the most influential factor for most of the variables analyzed. Solid yield (35–41 wt.%) and tar content (11–45 g/m3 STP) were largely reduced with temperature, whereas gas production (0:89 -- 1:32 m3 STP/kg sewage sludge dry and ash free), carbon yield to gas phase (62–90 wt.%), gasification efficiency (39–66%), and H2 and CO yields (20–52 and 137–414 g/kg sewage sludge dry and ash free, respectively) were improved at high temperature. Other important parameters for the end-use of the gas such as its heating value (4.12–6.20 MJ/m3 STP) and its H2/CO molar ratio (1.46–3.25) were greatly influenced by the composition of the gasification medium, since the increase in the steam to oxygen ratio was favorable for both. The comparison of experimental and theoretical results highlights that equilibrium was not reached during the experimental runs info:eu-repo/grantAgreement/ES/MINECO/CTQ2010-20137 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.321 2014 ENGINEERING, ENVIRONMENTAL 7 / 47 = 0.149 2014 Q1 T1 ENGINEERING, CHEMICAL 9 / 135 = 0.067 2014 Q1 T1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0002-9705-2207 Sánchez, J.L. Universidad de Zaragoza (orcid)0000-0002-3771-8994 Murillo, M.B. Universidad de Zaragoza Rodríguez, E. Gea, G. 5005 790 Universidad de Zaragoza Departamento de Ingeniería Química y Tecnologías del Medio Ambiente Tecnologías del Medio Ambiente 5005 555 Universidad de Zaragoza Departamento de Ingeniería Química y Tecnologías del Medio Ambiente Ingeniería Química 248 (2014), 373-382 Chem. eng. j. CHEMICAL ENGINEERING JOURNAL 1385-8947 506243 http://zaguan.unizar.es/record/32204/files/texto_completo.pdf Postprint 61378 http://zaguan.unizar.es/record/32204/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:32204 articulos driver 2017-05-03-13:43:57 ARTICLE