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Online estimation of coke in a circulating fluidized bed based on acoustic emission sensors and multivariate calibration / Ren Congjing in Industrial & engineering chemistry research, Vol. 50 N° 14 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8420-8429 Titre : Online estimation of coke in a circulating fluidized bed based on acoustic emission sensors and multivariate calibration Type de document : texte imprimé Auteurs : Ren Congjing, Auteur ; Tang Yueqi, Auteur ; Wang Jingdai, Auteur Année de publication : 2011 Article en page(s) : pp. 8420-8429 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Calibration  Acoustic  emission  Circulating  fluidized  bed  Fluidization Résumé : The aim of this work was to investigate the application of an acoustic monitoring system for production scale circulating fluidized bed processes. The relationship between acoustic signals and the coke amount deposited on the catalysts was investigated on both lab scale and production scale reactors. By using Power spectrum density analysis, the relationship between the coke amount and the frequency shift of the characteristic peak of acoustic signals was found to be linear. In addition, a model to detect the coke amount on catalyst was established based on partial least-squares regression. Comparing the model results with experimental data, the amount of deposited coke is determined with a correlation coefficient 0.947 and a root mean squares error of cross validation 0.948%, which means that this model is accurate and capable of monitoring the coke amount on catalyst. Furthermore, the results of the preliminary industrial tests are considered to be promising. This work provides valuable insights into the online monitoring of coke amounts in circulating fluidized beds based on an AE technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24346882 [article] Online estimation of coke in a circulating fluidized bed based on acoustic emission sensors and multivariate calibration [texte imprimé] / Ren Congjing, Auteur ; Tang Yueqi, Auteur ; Wang Jingdai, Auteur . - 2011 . - pp. 8420-8429. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 14 (Juillet 2011) . - pp. 8420-8429 Mots-clés : Calibration  Acoustic  emission  Circulating  fluidized  bed  Fluidization Résumé : The aim of this work was to investigate the application of an acoustic monitoring system for production scale circulating fluidized bed processes. The relationship between acoustic signals and the coke amount deposited on the catalysts was investigated on both lab scale and production scale reactors. By using Power spectrum density analysis, the relationship between the coke amount and the frequency shift of the characteristic peak of acoustic signals was found to be linear. In addition, a model to detect the coke amount on catalyst was established based on partial least-squares regression. Comparing the model results with experimental data, the amount of deposited coke is determined with a correlation coefficient 0.947 and a root mean squares error of cross validation 0.948%, which means that this model is accurate and capable of monitoring the coke amount on catalyst. Furthermore, the results of the preliminary industrial tests are considered to be promising. This work provides valuable insights into the online monitoring of coke amounts in circulating fluidized beds based on an AE technique. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24346882