@prefix prodottidellaricerca: . @prefix istituto: . @prefix prodotto: . istituto:CDS070 prodottidellaricerca:prodotto prodotto:ID42545 . @prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . unitaDiPersonaleInterno:MATRICOLA8383 pubblicazioni:autoreCNRDi prodotto:ID42545 . @prefix modulo: . modulo:ID1949 prodottidellaricerca:prodotto prodotto:ID42545 . @prefix rdf: . @prefix retescientifica: . prodotto:ID42545 rdf:type retescientifica:ProdottoDellaRicerca , prodotto:TIPO1101 . @prefix rdfs: . prodotto:ID42545 rdfs:label "The influence of thermal annealing on oxygen uptake and combustion rates of a bituminous coal char (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID42545 pubblicazioni:anno "2007-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID42545 skos:altLabel "
Osvalda Senneca, Piero Salatino and Daniela Menghini (2007)
The influence of thermal annealing on oxygen uptake and combustion rates of a bituminous coal char
in Proceedings of the Combustion Institute
"^^rdf:HTML ; pubblicazioni:autori "Osvalda Senneca, Piero Salatino and Daniela Menghini"^^xsd:string ; pubblicazioni:paginaInizio "1889"^^xsd:string ; pubblicazioni:paginaFine "1895"^^xsd:string ; pubblicazioni:numeroVolume "31"^^xsd:string . @prefix ns11: . prodotto:ID42545 pubblicazioni:rivista ns11:ID46381 ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "Istituto di Ricerche sulla Combustione, C.N.R,\nDipartimento di Ingegneria Chimica, Universit\u00E0 degli Studi di Napoli Federico II,"^^xsd:string ; pubblicazioni:titolo "The influence of thermal annealing on oxygen uptake and combustion rates of a bituminous coal char"^^xsd:string ; prodottidellaricerca:abstract "The effect of thermal annealing on the combustion reactivity of a bituminous coal char has been investigated\nwith a focus on the role of the formation of surface oxides by oxygen chemisorption. The combined\nuse of thermogravimetric analysis and of analysis of the off-gas during isothermal combustion of char samples\nenabled the determination of the rate and extent of oxygen uptake along burn-off. Combustion was\ncarried out at temperatures between 350 and 510 ?C. Char samples were prepared by controlled isothermal\nheat treatment of coal for different times (in the range between 1 s and 30 min) at different temperatures (in\nthe range 900-2000 ?C). Results indicate that oxygen uptake is extensive along burn off of chars prepared\nunder mild heat treatment conditions. The maximum oxygen uptake is barely affected by the combustion\ntemperature within the range of combustion conditions investigated. The severity of heat treatment has a\npronounced effect on char combustion rate as well as on the extent and rate at which surface oxides are\nbuilt up by oxygen chemisorption. Chars prepared under severe heat treatment conditions show negligible\noxygen uptake and strongly reduced combustion rates. Altogether it appears that a close correlation can be\nestablished between the extent and the accessibility of active sites on the carbon surface and the combustion\nrate. Despite the investigation has been carried out at temperatures well below those of practical interest,\nresults provide useful insight into the relationship existing between thermal annealing, formation of surface\noxide and combustion reactivity which is relevant to the proper formulation of detailed kinetic models of\nchar combustion.\n? 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved." ; prodottidellaricerca:prodottoDi istituto:CDS070 , modulo:ID1949 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA8383 . ns11:ID46381 pubblicazioni:rivistaDi prodotto:ID42545 .