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Hydrogen production from a victorian brown coal with in situ CO2 capture in a 1 kWth dual fluidized-bed gasification r / Hui An in Industrial & engineering chemistry research, Vol. 51 N° 40 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13046–13053 Titre : Hydrogen production from a victorian brown coal with in situ CO2 capture in a 1 kWth dual fluidized-bed gasification r Type de document : texte imprimé Auteurs : Hui An, Auteur ; Tao Song, Auteur ; Laihong Shen, Auteur Année de publication : 2012 Article en page(s) : pp. 13046–13053 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hydrogen  Gasification Résumé : The removal of CO2 during coal gasification will improve H2 yield by promoting coal gasification reactions toward the production of H2. In this work, coal gasification with in situ CO2 capture has been investigated in a 1 kWth dual fluidized-bed gasification reactor. A Victorian brown coal was used as the feed stock. Coal gasification tests at 700 °C were performed with silica sands as the heat carrier and synthetic CaO sorbent for comparison. It was found that the addition of the sorbent improved H2 concentration in the outlet of the fuel reactor by nearly 53%. Carbon conversion rate was also increased and a maximum of 33% was reported. Calcium aluminate cement was used as a binder for the fabrication of the synthetic CaO sorbent, in an attempt to enhance its mechanical strength and improve its chemical properties. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300747m [article] Hydrogen production from a victorian brown coal with in situ CO2 capture in a 1 kWth dual fluidized-bed gasification r [texte imprimé] / Hui An, Auteur ; Tao Song, Auteur ; Laihong Shen, Auteur . - 2012 . - pp. 13046–13053. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 40 (Octobre 2012) . - pp. 13046–13053 Mots-clés : Hydrogen  Gasification Résumé : The removal of CO2 during coal gasification will improve H2 yield by promoting coal gasification reactions toward the production of H2. In this work, coal gasification with in situ CO2 capture has been investigated in a 1 kWth dual fluidized-bed gasification reactor. A Victorian brown coal was used as the feed stock. Coal gasification tests at 700 °C were performed with silica sands as the heat carrier and synthetic CaO sorbent for comparison. It was found that the addition of the sorbent improved H2 concentration in the outlet of the fuel reactor by nearly 53%. Carbon conversion rate was also increased and a maximum of 33% was reported. Calcium aluminate cement was used as a binder for the fabrication of the synthetic CaO sorbent, in an attempt to enhance its mechanical strength and improve its chemical properties. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie300747m

Model for degradation of galactoglucomannan in hot water extraction conditions / Juha A. Visuri in Industrial & engineering chemistry research, Vol.51 N° 31 (Août 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol.51 N° 31 (Août 2012) . - pp. 10338–10344 Titre : Model for degradation of galactoglucomannan in hot water extraction conditions Type de document : texte imprimé Auteurs : Juha A. Visuri, Auteur ; Tao Song, Auteur ; Susanna Kuitunen, Auteur Année de publication : 2012 Article en page(s) : pp. 10338–10344 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hot  water  Modeling Résumé : A kinetic analysis is presented for the homogeneous degradation of galactoglucomannan (GGM) in hot water extraction conditions. In the experiments used for constructing the kinetic model, GGM extracted from spruce wood meal was treated at temperatures from 150 to 170 °C and in buffered pH 3.8―4.2. The hydrolysis of glycosidic bonds in GGM was modeled as a random process which is catalyzed by hydrogen ions. The real hydrogen ion concentration at the reaction temperatures was estimated. The Arrhenius equation was used to describe the temperature dependence of the hydrolysis rate and an activation energy of 102 kj/mol was obtained for the reaction. The presented model predicts accurately the evolution of the molecular weight distribution with lower computational load than other similar models. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234064 [article] Model for degradation of galactoglucomannan in hot water extraction conditions [texte imprimé] / Juha A. Visuri, Auteur ; Tao Song, Auteur ; Susanna Kuitunen, Auteur . - 2012 . - pp. 10338–10344. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol.51 N° 31 (Août 2012) . - pp. 10338–10344 Mots-clés : Hot  water  Modeling Résumé : A kinetic analysis is presented for the homogeneous degradation of galactoglucomannan (GGM) in hot water extraction conditions. In the experiments used for constructing the kinetic model, GGM extracted from spruce wood meal was treated at temperatures from 150 to 170 °C and in buffered pH 3.8―4.2. The hydrolysis of glycosidic bonds in GGM was modeled as a random process which is catalyzed by hydrogen ions. The real hydrogen ion concentration at the reaction temperatures was estimated. The Arrhenius equation was used to describe the temperature dependence of the hydrolysis rate and an activation energy of 102 kj/mol was obtained for the reaction. The presented model predicts accurately the evolution of the molecular weight distribution with lower computational load than other similar models. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234064