@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS070 prodottidellaricerca:prodotto prodotto:ID280180 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA5587 pubblicazioni:autoreCNRDi prodotto:ID280180 . @prefix modulo: . modulo:ID1949 prodottidellaricerca:prodotto prodotto:ID280180 . modulo:ID6215 prodottidellaricerca:prodotto prodotto:ID280180 . @prefix rdf: . prodotto:ID280180 rdf:type prodotto:TIPO1101 . @prefix retescientifica: . prodotto:ID280180 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID280180 rdfs:label "Entrained-flow gasification of coal under slagging conditions: Relevance of fuel-wall interaction and char segregation to the properties of solid wastes (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID280180 pubblicazioni:anno "2013-01-01T00:00:00+01:00"^^xsd:gYear ; pubblicazioni:doi "10.1016/j.fuel.2013.03.040"^^xsd:string . @prefix skos: . prodotto:ID280180 skos:altLabel "
Ambrosino F.; Aprovitola A.; Brachi P.; Marra F.S.; Montagnaro F.; Salatino P. (2013)
Entrained-flow gasification of coal under slagging conditions: Relevance of fuel-wall interaction and char segregation to the properties of solid wastes
in Fuel (Guildf.)
"^^rdf:HTML ; pubblicazioni:autori "Ambrosino F.; Aprovitola A.; Brachi P.; Marra F.S.; Montagnaro F.; Salatino P."^^xsd:string ; pubblicazioni:paginaInizio "44"^^xsd:string ; pubblicazioni:paginaFine "55"^^xsd:string ; pubblicazioni:url "http://www.scopus.com/inward/record.url?eid=2-s2.0-84885189687&partnerID=q2rCbXpz"^^xsd:string ; pubblicazioni:numeroVolume "114"^^xsd:string . @prefix ns11: . prodotto:ID280180 pubblicazioni:rivista ns11:ID386967 ; skos:note "Scopu"^^xsd:string ; pubblicazioni:affiliazioni "ENEA, CR Portici, Piazzale Enrico Fermi 1, 80055 Portici, Italy; Istituto di Ricerche sulla Combustione, Consiglio Nazionale Delle Ricerche, via Diocleziano 328, 80124 Napoli, Italy; Dipartimento di Scienze Chimiche, Universit\u00E0 Degli Studi di Napoli Federico II, Complesso Universitario di Monte sant'Angelo, 80126 Napoli, Italy; Dipartimento di Ingegneria Chimica, Dei Materiali e della Produzione Industriale, Universit\u00E0 Degli Studi di Napoli Federico II, Piazzale Vincenzo Tecchio 80, 80125 Napoli, Italy"^^xsd:string ; pubblicazioni:titolo "Entrained-flow gasification of coal under slagging conditions: Relevance of fuel-wall interaction and char segregation to the properties of solid wastes"^^xsd:string ; prodottidellaricerca:abstract "Entrained-flow slagging gasifiers are characterized by operating conditions that promote ash migration/ deposition onto the reactor walls, whence ash is drained as a molten phase. Experimental investigation on ashes generated by full-scale plants suggested that both char entrapment inside the melt and carboncoverage of the slag can occur. Because of the wide range of spatial and temporal scales involved in these phenomena, numerical simulation of the fate of the flying fine char particles is a very difficult task. This work illustrates how different numerical modeling approaches can be jointly used to understand segregation patterns of char particles in full-scale entrained-flow coal gasifiers operated in the slagging regime. A multilevel approach has been developed for this purpose. RANS-based simulations of the full-scale geometry with coal particle injection and tracking aimed to obtain the general behavior of the flow field and particle trajectories. Simulations enabled to estimate the effect of swirl and tangential flow on the bulk-to-wall char particle deposition rate. Then, RANS results were adopted in a more detailed numerical model based on the solution of the filtered Navier-Stokes equations. In this last model, a turbulence LES approach for the Eulerian gas phase was applied. The equations of particles motion were solved via a Lagrangian particle tracking algorithm with the TrackToFace method. Simulations were performed involving a level of detail that allowed to obtain a clear picture of the multiphase flow behavior responsible for char deposition phenomena. This multilevel approach enabled the assessment of the char particle deposition rates and the nature of char-slag interaction (segregation/entrapment) that are likely to occur in full-scale slagging gasifiers. Results of numerical simulations have been critically discussed in the light of experimental findings. They represent a useful source of information for the implementation of constitutive equations and parameters in design-oriented reduced compartmental models. \u00A9 2013 Elsevier Ltd. All rights reserved."@en ; prodottidellaricerca:prodottoDi modulo:ID6215 , istituto:CDS070 , modulo:ID1949 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA5587 . @prefix parolechiave: . prodotto:ID280180 parolechiave:insiemeDiParoleChiave . ns11:ID386967 pubblicazioni:rivistaDi prodotto:ID280180 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID280180 .