Formation of a Ca12Al14O33 nanolayer and its effect on the attrition behavior of CO2 - adsorbent microspheres composed of CaO nanoparticles / Su F. Wu in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12269–12275 Titre : Formation of a Ca12Al14O33 nanolayer and its effect on the attrition behavior of CO2 - adsorbent microspheres composed of CaO nanoparticles Type de document : texte imprimé Auteurs : Su F. Wu, Auteur ; Ming Z. Jiang, Auteur Année de publication : 2011 Article en page(s) : pp. 12269–12275 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanolayer Microspheres Nanoparticles Résumé : The attrition behavior of microspheres composed of CaO nanoparticles that were used as high-temperature CO2-reactive adsorbents was investigated. The nano-CaO/Al2O3 microsphere adsorbents were prepared by a spray technique from a slurry containing a precursor of CaCO3 nanoparticles and an aluminum oxide gel. A mechanism of formation of the layer of nano-Ca12Al14O33 was proposed and optimized, with calcination temperatures ranging from 900 to 1000 °C and Ca/Al molar ratios between 2.3 and 3.5. The attrition behavior of the adsorbent was investigated in detail using the air jet method to measure fine loss, as well as with scanning electron microscopy and a particle size analyzer to examine the changes in surface morphology and particle size distribution. The attrition studies showed that complete formation of a Ca12Al14O33 nanoscale framework under calcination temperatures ranging from 900 to 1000 °C and Ca/Al molar ratios between 2.3 and 3.5 resulted in improved resistance to attrition and increased durability of the reactive sorption capacity of the adsorbent. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901561e [article] Formation of a Ca12Al14O33 nanolayer and its effect on the attrition behavior of CO2 - adsorbent microspheres composed of CaO nanoparticles [texte imprimé] / Su F. Wu, Auteur ; Ming Z. Jiang, Auteur . - 2011 . - pp. 12269–12275. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12269–12275 Mots-clés : Nanolayer Microspheres Nanoparticles Résumé : The attrition behavior of microspheres composed of CaO nanoparticles that were used as high-temperature CO2-reactive adsorbents was investigated. The nano-CaO/Al2O3 microsphere adsorbents were prepared by a spray technique from a slurry containing a precursor of CaCO3 nanoparticles and an aluminum oxide gel. A mechanism of formation of the layer of nano-Ca12Al14O33 was proposed and optimized, with calcination temperatures ranging from 900 to 1000 °C and Ca/Al molar ratios between 2.3 and 3.5. The attrition behavior of the adsorbent was investigated in detail using the air jet method to measure fine loss, as well as with scanning electron microscopy and a particle size analyzer to examine the changes in surface morphology and particle size distribution. The attrition studies showed that complete formation of a Ca12Al14O33 nanoscale framework under calcination temperatures ranging from 900 to 1000 °C and Ca/Al molar ratios between 2.3 and 3.5 resulted in improved resistance to attrition and increased durability of the reactive sorption capacity of the adsorbent. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901561e

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