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

ABSTRACT: 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 8.02??9.96?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, C_?H_?O_?N_?S_?, in order to assist in the products yields optimization.

SUBMITTER: Ben Hassen Trabelsi A 

PROVIDER: S-EPMC5569640 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature