title: Modeling and investigation of the channeling phenomenon in downdraft stratified gasifers.
abstract: Downdraft stratified gasifiers seem to be the reactors which are most influenced by loading conditions. Moreover, the larger the reactor is, the higher the possibility to stumble across a channeling phenomenon. This high sensitivity is due to the limited thickness and superficial placement of the flaming pyrolysis layer coupled with the necessity to keep all the zones parallel for a correct running of this kind of gasifier. This study was aimed at modeling and investigating the channeling phenomenon generated by loading condition variations on a 250-kWe nominal power gasification power plant. The experimental campaign showed great variations in most of the plant outputs. These phenomena were modeled on two modified mathematical models obtained from literature. The results of the models confirmed the capability of this approach to predict the channeling phenomena and its dependency on the loading method.
authors.affiliation: Bio-Energy Efficiency Laboratory, University of Modena and Reggio Emilia, Department of Engineering 'Enzo Ferrari', Via Vignolese 905, 41125 Modena, Italy.
authors.forename: Giulio
authors.initials: G
authors.lastname: Allesina
authors.affiliation: Bio-Energy Efficiency Laboratory, University of Modena and Reggio Emilia, Department of Engineering 'Enzo Ferrari', Via Vignolese 905, 41125 Modena, Italy. Electronic address: simone.pedrazzi@unimore.it.
authors.forename: Simone
authors.initials: S
authors.lastname: Pedrazzi
authors.affiliation: Bio-Energy Efficiency Laboratory, University of Modena and Reggio Emilia, Department of Engineering 'Enzo Ferrari', Via Vignolese 905, 41125 Modena, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Tartarini
mesh_terms: D000388:Air; D018533:Biomass; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D004867:Equipment Design; D005740:Gases; D017745:Incineration; D008697:Methane / Q000737:chemistry; D008962:Models, Theoretical; D011210:Power Plants; D013696:Temperature; D013997:Time Factors; D014934:Wood
chemical_list: D005740:Gases; D008697:Methane
keywords: Channeling; Gasification; Stratified reactor; Syngas; Tar