title: Assessment of syngas composition variability in a pilot-scale downdraft biomass gasifier by an extended equilibrium model.
abstract: A new simplified approach based on equilibrium modeling is proposed in this work to describe the correlations among syngas species experimentally observed in a pilot scale downdraft biomass gasifier operated with different feedstocks (biomass pellets and vine prunings). The modeling approach is based on experimental evidence on the presence of devolatilization products in the syngas and fluctuations of syngas composition during stationary operation, accounted for by introducing two empirical parameters, a by-pass index and a permeability index. The simplified model correctly reproduces the correlations among the main syngas species (including methane and ethylene) resulting from experimental data of pilot tests with different feedstocks and under a wide range of operating conditions.
authors.affiliation: Università di Pisa, Dipartimento Ingegneria Civile e Industriale, Largo Lucio Lazzarino, 56122 Pisa, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Simone
authors.forename: Federica
authors.initials: F
authors.lastname: Barontini
authors.forename: Cristiano
authors.initials: C
authors.lastname: Nicolella
authors.forename: Leonardo
authors.initials: L
authors.lastname: Tognotti
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation*; D002849:Chromatography, Gas; D005740:Gases / Q000737:chemistry*; D008962:Models, Theoretical; D010865:Pilot Projects; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D027843:Vitis / Q000737:chemistry
chemical_list: D005740:Gases