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4 - Chlorophenol oxidation photocatalyzed by a calcined Mg – Al – Zn layered double hydroxide in a co - current downflow bubble column / Eduardo Martín del Campo in Industrial & engineering chemistry research, Vol. 50 N° 20 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11544-11552 Titre : 4 - Chlorophenol oxidation photocatalyzed by a calcined Mg – Al – Zn layered double hydroxide in a co - current downflow bubble column Type de document : texte imprimé Auteurs : Eduardo Martín del Campo, Auteur ; Jaime Sanchez Valente, Auteur ; Thelma Pavon, Auteur Année de publication : 2011 Article en page(s) : pp. 11544-11552 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Bubble  column  Downward  flow  Cocurrent  flow  Calcining  Oxidation Résumé : The objective of this work is to study, for the first time, the photodegradation of 4chlorophenol (4CP) catalyzed by a calcined Mg-Zn-Al layered double hydroxides (MgAlZn LDHs) in a co-current downflow bubble column (CDBC) photoreactor at pilot scale. The effect of initial organic compound concentration (C4CP0), temperature (T), and mass catalyst over reaction rate (-r4CP) was elucidated. An intrinsic kinetic regime was established, and a single-site Langmuir-Hinshelwood mechanism was determined to occur during the organic compound oxidation. The catalyst was characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-AES), and ultraviolet-visible light (UV/vis) spectrophotometry. The reaction progress was verified by UV/vis spectrophotometry and total organic carbon (TOC) content. Degradation and mineralization rate were found to be dependent on T and 4CP concentration. In the range of studied operating conditions, a maximum of 94% 4CP was degraded, while 70% total organic carbon removal was achieved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612377 [article] 4 - Chlorophenol oxidation photocatalyzed by a calcined Mg – Al – Zn layered double hydroxide in a co - current downflow bubble column [texte imprimé] / Eduardo Martín del Campo, Auteur ; Jaime Sanchez Valente, Auteur ; Thelma Pavon, Auteur . - 2011 . - pp. 11544-11552. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 20 (Octobre 2011) . - pp. 11544-11552 Mots-clés : Bubble  column  Downward  flow  Cocurrent  flow  Calcining  Oxidation Résumé : The objective of this work is to study, for the first time, the photodegradation of 4chlorophenol (4CP) catalyzed by a calcined Mg-Zn-Al layered double hydroxides (MgAlZn LDHs) in a co-current downflow bubble column (CDBC) photoreactor at pilot scale. The effect of initial organic compound concentration (C4CP0), temperature (T), and mass catalyst over reaction rate (-r4CP) was elucidated. An intrinsic kinetic regime was established, and a single-site Langmuir-Hinshelwood mechanism was determined to occur during the organic compound oxidation. The catalyst was characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectrometry (ICP-AES), and ultraviolet-visible light (UV/vis) spectrophotometry. The reaction progress was verified by UV/vis spectrophotometry and total organic carbon (TOC) content. Degradation and mineralization rate were found to be dependent on T and 4CP concentration. In the range of studied operating conditions, a maximum of 94% 4CP was degraded, while 70% total organic carbon removal was achieved. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24612377