Documents disponibles écrits par cet auteur

Preparation and characterization of Fe2O3/Al2O3 using the solution combustion approach for chemical looping combustion / Jianshe Zhang in Industrial & engineering chemistry research, Vol. 51 N° 39 (Octobre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12773-12781 Titre : Preparation and characterization of Fe2O3/Al2O3 using the solution combustion approach for chemical looping combustion Type de document : texte imprimé Auteurs : Jianshe Zhang, Auteur ; Qingjie Guo, Auteur ; Yongzhuo Liu, Auteur Année de publication : 2012 Article en page(s) : pp. 12773-12781 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Combustion  Preparation Résumé : Chemical looping combustion (CLC) is an attractive technology for CO2 capture with high energy efficiency. In this article, an Fe2O3/Al2O3 (Fe:Al = 3:1) oxygen carrier was first prepared by the solution combustion approach for the CLC process. The prepared oxygen carrier was characterized by different means. XRD identification has substantiated the necessity of calcinations to synthesize Fe2O3/Al2O3 oxygen carrier. SEM and TEM images showed the regular spherical and cubical shape and abundant porous structure in Fe2O3/Al2O3 oxygen carrier, respectively. Structural characteristics displayed that the pore shape of Fe2O3/Al2O3 particles was heterogeneous. The average pore size and surface area were 64.76 nm and 4.01 m2/g, respectively. Further, H2 temperature programmed reduction (TPR) of Fe2O3/Al2O3 oxygen carrier indicated that the reduction reaction had only one distinct DTG peak with the weight loss rate reaching 4.75 wt %/min. Finally, five cycles of red-ox reaction by alternating with CH4 and air demonstrated that Fe2O3/Al2O3 oxygen carrier had excellent reactivity and sintering resistance and consequently was capable of the CLC process. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26419232 [article] Preparation and characterization of Fe2O3/Al2O3 using the solution combustion approach for chemical looping combustion [texte imprimé] / Jianshe Zhang, Auteur ; Qingjie Guo, Auteur ; Yongzhuo Liu, Auteur . - 2012 . - pp. 12773-12781. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 39 (Octobre 2012) . - pp. 12773-12781 Mots-clés : Combustion  Preparation Résumé : Chemical looping combustion (CLC) is an attractive technology for CO2 capture with high energy efficiency. In this article, an Fe2O3/Al2O3 (Fe:Al = 3:1) oxygen carrier was first prepared by the solution combustion approach for the CLC process. The prepared oxygen carrier was characterized by different means. XRD identification has substantiated the necessity of calcinations to synthesize Fe2O3/Al2O3 oxygen carrier. SEM and TEM images showed the regular spherical and cubical shape and abundant porous structure in Fe2O3/Al2O3 oxygen carrier, respectively. Structural characteristics displayed that the pore shape of Fe2O3/Al2O3 particles was heterogeneous. The average pore size and surface area were 64.76 nm and 4.01 m2/g, respectively. Further, H2 temperature programmed reduction (TPR) of Fe2O3/Al2O3 oxygen carrier indicated that the reduction reaction had only one distinct DTG peak with the weight loss rate reaching 4.75 wt %/min. Finally, five cycles of red-ox reaction by alternating with CH4 and air demonstrated that Fe2O3/Al2O3 oxygen carrier had excellent reactivity and sintering resistance and consequently was capable of the CLC process. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26419232

Reaction mechanism of coal chemical looping process for syngas production with CaSO4 oxygen carrier in the CO2 atmosphere / Yongzhuo Liu 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. 10364-10373 Titre : Reaction mechanism of coal chemical looping process for syngas production with CaSO4 oxygen carrier in the CO2 atmosphere Type de document : texte imprimé Auteurs : Yongzhuo Liu, Auteur ; Qingjie Guo, Auteur ; Yu Cheng, Auteur Année de publication : 2012 Article en page(s) : pp. 10364-10373 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Carbon  dioxide  Production  Synthesis  gas  Coal  Reaction  mechanism Résumé : Chemical looping combustion process for gaseous and solid fuel has been investigated widely. Recently, particular attention is paid to syngas and hydrogen generation from natural gas or solid fuels. CaSO4 has been proved to be a promising oxygen carrier for the chemical looping process with the merit of low price and environmental friendliness. The reaction mechanism of coal and pure CaSO4 for syngas production in the CO2 atmosphere was investigated using the simultaneous thermal analyzer in this paper. First, the thermodynamic analysis of reaction between coal and CaSO4 with different mass ratios was carried out respectively in N2 and CO2 atmospheres. It predicted that the CO2 can promote the reactions, while the coal-CaSO4 mass ratios affected the fate of sulfurous gaseous species greatly. Subsequently, thermogravimetric experiments were conducted by the peak fitting technique. It concluded that the drying and pyrolysis of the coal were main reactions before 800 °C, while the complex reactions, including the reaction between CaSO4 and coal char, gasification of coal char, and the decomposition of CaSO4, occurred during 800―1100 °C. The reaction kinetics and types of the reaction between coal and CaSO4 for syngas in the CO2 atmosphere were explored by isoconversional method. It indicated that the complex processes were controlled by the diffusion of gas—solid or solid―solid first, followed by parallel competing reactions. Finally, the reaction residues between coal and pure CaSO4 with different mole ratios were analyzed using scanning electron microscopy and energy dispersive spectrometer (SEM-EDS). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234067 [article] Reaction mechanism of coal chemical looping process for syngas production with CaSO4 oxygen carrier in the CO2 atmosphere [texte imprimé] / Yongzhuo Liu, Auteur ; Qingjie Guo, Auteur ; Yu Cheng, Auteur . - 2012 . - pp. 10364-10373. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol.51 N° 31 (Août 2012) . - pp. 10364-10373 Mots-clés : Carbon  dioxide  Production  Synthesis  gas  Coal  Reaction  mechanism Résumé : Chemical looping combustion process for gaseous and solid fuel has been investigated widely. Recently, particular attention is paid to syngas and hydrogen generation from natural gas or solid fuels. CaSO4 has been proved to be a promising oxygen carrier for the chemical looping process with the merit of low price and environmental friendliness. The reaction mechanism of coal and pure CaSO4 for syngas production in the CO2 atmosphere was investigated using the simultaneous thermal analyzer in this paper. First, the thermodynamic analysis of reaction between coal and CaSO4 with different mass ratios was carried out respectively in N2 and CO2 atmospheres. It predicted that the CO2 can promote the reactions, while the coal-CaSO4 mass ratios affected the fate of sulfurous gaseous species greatly. Subsequently, thermogravimetric experiments were conducted by the peak fitting technique. It concluded that the drying and pyrolysis of the coal were main reactions before 800 °C, while the complex reactions, including the reaction between CaSO4 and coal char, gasification of coal char, and the decomposition of CaSO4, occurred during 800―1100 °C. The reaction kinetics and types of the reaction between coal and CaSO4 for syngas in the CO2 atmosphere were explored by isoconversional method. It indicated that the complex processes were controlled by the diffusion of gas—solid or solid―solid first, followed by parallel competing reactions. Finally, the reaction residues between coal and pure CaSO4 with different mole ratios were analyzed using scanning electron microscopy and energy dispersive spectrometer (SEM-EDS). ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26234067