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BioMed Research International
Volume 2017, Article ID 7831470, 14 pages
Research Article

Hydrogen-Rich Syngas Production from Gasification and Pyrolysis of Solar Dried Sewage Sludge: Experimental and Modeling Investigations

1Laboratory of Wind Energy Control and Waste Energy Recovery (LMEEVED), Research and Technology Centre of Energy (CRTEn), Borj-Cedria Technopark, BP 95, 2050 Hammam-Lif, Tunisia
2Department of Geology, Faculty of Sciences of Tunis, University of Tunis El Manar, Tunis, Tunisia
3Laboratory of Microbial Ecology and Technology (LETMi), The National Institute of Applied Sciences and Technology (INSAT), Carthage University, 2 Boulevard de la Terre, BP 676, 1080 Tunis, Tunisia

Correspondence should be addressed to Aïda Ben Hassen Trabelsi; rf.oohay@nessahnebadia

Received 8 May 2017; Revised 21 June 2017; Accepted 28 June 2017; Published 9 August 2017

Academic Editor: Juan-Rodrigo Bastidas-Oyanedel

Copyright © 2017 Aïda Ben Hassen Trabelsi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Solar dried sewage sludge (SS) conversion by pyrolysis and gasification processes has been performed, separately, using two laboratory-scale reactors, a fixed-bed pyrolyzer and a downdraft gasifier, to produce mainly hydrogen-rich syngas. Prior to SS conversion, solar drying has been conducted in order to reduce moisture content (up to 10%). SS characterization reveals that these biosolids could be appropriate materials for gaseous products production. The released gases from SS pyrolysis and gasification present relatively high heating values (up to 9.96 MJ/kg for pyrolysis and 8.029.96 MJ/kg for gasification) due to their high contents of H2 (up to 11 and 7 wt%, resp.) and CH4 (up to 17 and 5 wt%, resp.). The yields of combustible gases (H2 and CH4) show further increase with pyrolysis. Stoichiometric models of both pyrolysis and gasification reactions were determined based on the global biomass formula, , in order to assist in the products yields optimization.