Documents disponibles écrits par cet auteur

Combustion characteristics and nitric oxide release of the pulverized coals under oxy-enrich conditions / Chunbo Wang in Industrial & engineering chemistry research, Vol. 51 N° 44 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14355-14360 Titre : Combustion characteristics and nitric oxide release of the pulverized coals under oxy-enrich conditions Type de document : texte imprimé Auteurs : Chunbo Wang, Auteur ; Ming Lei, Auteur ; Huimin Liu, Auteur Année de publication : 2013 Article en page(s) : pp. 14355-14360 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Coal  Combustion Résumé : Instead of using pure oxygen in oxy-fuel combustion, oxy-enrich combustion uses air to replace part of pure oxygen for coal combustion. Compared with oxy-fuel combustion, oxy-enrich combustion uses much less pure oxygen, which may reduce the cost for CO2 capture due to the reduction of pure oxygen requirement. The thermo-gravimetric technique was used to study the combustion characteristics of three pulverized coals under oxy-enrich atmospheres. The results show that both the ignition and burnout temperatures of pulverized coals decrease with the rise of oxygen concentration, while the combustibility index S increases gradually. Under the same oxygen concentration, the ignition and burnout temperatures in oxy-enrich combustion are lower than those in oxy-fuel combustion due to the different properties between N2 and CO2. A fixed-bed reactor (FBR) was used to investigate the NO emissions of a coal sample at different atmospheres. It is found that temperature has played an important role in NO releasing. With the increase of furnace temperature, the peaks of NO release appear to occur early. For the tested coal, the conversion rates of fuel-N to NO in air are higher than those in oxy-fuel or oxy-enrich atmospheres, which may be due to the effect of CO2 gasification. The conversion of fuel-N to NO appears to have some complicated tendencies in oxy-enrich combustion, and some possible reasons about this were discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620348 [article] Combustion characteristics and nitric oxide release of the pulverized coals under oxy-enrich conditions [texte imprimé] / Chunbo Wang, Auteur ; Ming Lei, Auteur ; Huimin Liu, Auteur . - 2013 . - pp. 14355-14360. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14355-14360 Mots-clés : Coal  Combustion Résumé : Instead of using pure oxygen in oxy-fuel combustion, oxy-enrich combustion uses air to replace part of pure oxygen for coal combustion. Compared with oxy-fuel combustion, oxy-enrich combustion uses much less pure oxygen, which may reduce the cost for CO2 capture due to the reduction of pure oxygen requirement. The thermo-gravimetric technique was used to study the combustion characteristics of three pulverized coals under oxy-enrich atmospheres. The results show that both the ignition and burnout temperatures of pulverized coals decrease with the rise of oxygen concentration, while the combustibility index S increases gradually. Under the same oxygen concentration, the ignition and burnout temperatures in oxy-enrich combustion are lower than those in oxy-fuel combustion due to the different properties between N2 and CO2. A fixed-bed reactor (FBR) was used to investigate the NO emissions of a coal sample at different atmospheres. It is found that temperature has played an important role in NO releasing. With the increase of furnace temperature, the peaks of NO release appear to occur early. For the tested coal, the conversion rates of fuel-N to NO in air are higher than those in oxy-fuel or oxy-enrich atmospheres, which may be due to the effect of CO2 gasification. The conversion of fuel-N to NO appears to have some complicated tendencies in oxy-enrich combustion, and some possible reasons about this were discussed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620348