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Numerical and experimental investigation of arsenic removal process from phosphoric acid by vertical zone melting technique / Yongsheng Ren in Industrial & engineering chemistry research, Vol. 51 N° 10 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4035–4040 Titre : Numerical and experimental investigation of arsenic removal process from phosphoric acid by vertical zone melting technique Type de document : texte imprimé Auteurs : Yongsheng Ren, Auteur ; Xiaoxiao Duan, Auteur ; Baoming Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 4035–4040 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Phosphoric  acid  Arsenic  removal  process Résumé : A combined numerical and experimental approach was undertaken to investigate the arsenic removal process from phosphoric acid by vertical zone melting technique. The numerical model, which predicts the arsenic re-distribution at any point of the single zone pass, multiple molten zone passes, or ultimate distribution, is described for providing simulations. Experimental work on arsenic removal by vertical zone melting process was carried out with prepared phosphoric acid samples as the starting material. The experimentally obtained axial concentration profiles were compared with the theoretical predictions, which proved the efficiency of the proposed model in removing the arsenic concentration significantly. Following the model and as evidenced from the theoretical predictions, the arsenic concentration reduced to <50 ng·g–1 and a 99.8% removal rate were obtained under the conditions of molten zone length of 0.1L, molten zone velocity of 3 mm·h–1, and nine molten zone passes. Also, the experimental and simulated results were undertaken to find out the influence of the crucial zone melting parameters including the number of passes, the molten zone length, and the molten zone velocity on the efficiency of arsenic removal from phosphoric acid by vertical zone melting technique. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2027553 [article] Numerical and experimental investigation of arsenic removal process from phosphoric acid by vertical zone melting technique [texte imprimé] / Yongsheng Ren, Auteur ; Xiaoxiao Duan, Auteur ; Baoming Wang, Auteur . - 2012 . - pp. 4035–4040. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 10 (Mars 2012) . - pp. 4035–4040 Mots-clés : Phosphoric  acid  Arsenic  removal  process Résumé : A combined numerical and experimental approach was undertaken to investigate the arsenic removal process from phosphoric acid by vertical zone melting technique. The numerical model, which predicts the arsenic re-distribution at any point of the single zone pass, multiple molten zone passes, or ultimate distribution, is described for providing simulations. Experimental work on arsenic removal by vertical zone melting process was carried out with prepared phosphoric acid samples as the starting material. The experimentally obtained axial concentration profiles were compared with the theoretical predictions, which proved the efficiency of the proposed model in removing the arsenic concentration significantly. Following the model and as evidenced from the theoretical predictions, the arsenic concentration reduced to <50 ng·g–1 and a 99.8% removal rate were obtained under the conditions of molten zone length of 0.1L, molten zone velocity of 3 mm·h–1, and nine molten zone passes. Also, the experimental and simulated results were undertaken to find out the influence of the crucial zone melting parameters including the number of passes, the molten zone length, and the molten zone velocity on the efficiency of arsenic removal from phosphoric acid by vertical zone melting technique. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie2027553