Backmixing characterization of a bubble column with short venturi throats by multipoint internal tracer injections / Zi-Bin Huang in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9733-9741 Titre : Backmixing characterization of a bubble column with short venturi throats by multipoint internal tracer injections Type de document : texte imprimé Auteurs : Zi-Bin Huang, Auteur ; Zhen-Min Cheng, Auteur ; Jian-Ding Chen, Auteur Année de publication : 2012 Article en page(s) : pp. 9733-9741 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Tracers Venturi Bubble column Backmixing Résumé : In reduction of liquid backmixing in bubble columns, Wu et al. [Wu, Y; Cheng, Z. M.; Huang, Z. B. Backmixing reduction of a bubble column by interruption of the global liquid circulation. Ind. Eng. Chem. Res. 2009, 48, 6558― 6563] have shown that the backmixing could be substantially reduced by interrupting the global liquid circulation using four identical short Venturi throats (SVTs). Considering the advantages of such structures, it is necessary to further investigate the backmixing characteristics of a bubble column with SVTs. In the present work, a multipoint tracer injection and detection device was employed to enhance the insight into where and how the liquid tracer was backmixed in different stages of a 50-cm diameter column. Tracer response profiles were measured to track the liquid backmixing trajectory in different stages at various operating conditions. The results showed that the backmixing of the column was sensitive to the throat diameter of SVTs. Based on the observed physical phenomena, a tanks-in-series with backflow (TISB) model was adopted to interpret the tracer experiment data, which shows an excellent agreement between the prediction and experimental measurements. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184951 [article] Backmixing characterization of a bubble column with short venturi throats by multipoint internal tracer injections [texte imprimé] / Zi-Bin Huang, Auteur ; Zhen-Min Cheng, Auteur ; Jian-Ding Chen, Auteur . - 2012 . - pp. 9733-9741. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9733-9741 Mots-clés : Tracers Venturi Bubble column Backmixing Résumé : In reduction of liquid backmixing in bubble columns, Wu et al. [Wu, Y; Cheng, Z. M.; Huang, Z. B. Backmixing reduction of a bubble column by interruption of the global liquid circulation. Ind. Eng. Chem. Res. 2009, 48, 6558― 6563] have shown that the backmixing could be substantially reduced by interrupting the global liquid circulation using four identical short Venturi throats (SVTs). Considering the advantages of such structures, it is necessary to further investigate the backmixing characteristics of a bubble column with SVTs. In the present work, a multipoint tracer injection and detection device was employed to enhance the insight into where and how the liquid tracer was backmixed in different stages of a 50-cm diameter column. Tracer response profiles were measured to track the liquid backmixing trajectory in different stages at various operating conditions. The results showed that the backmixing of the column was sensitive to the throat diameter of SVTs. Based on the observed physical phenomena, a tanks-in-series with backflow (TISB) model was adopted to interpret the tracer experiment data, which shows an excellent agreement between the prediction and experimental measurements. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26184951

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Simultaneous absorption of CO2 and NH3 into water in a rotating packed bed / Bao-Chang Sun in Industrial & engineering chemistry research, Vol. 48 N° 24 (Décembre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 11175–11180 Titre : Simultaneous absorption of CO2 and NH3 into water in a rotating packed bed Type de document : texte imprimé Auteurs : Bao-Chang Sun, Auteur ; Xue-Mei Wang, Auteur ; Jian-Ding Chen, Auteur Année de publication : 2010 Article en page(s) : pp. 11175–11180 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Simultaneous--Absorption--CO2--NH3--Rotating--Packed Résumé : This article presents the modeling and experimental investigation of the simultaneous absorption of CO2 and NH3 into water in a rotating packed bed (RPB). A model was established to predict the overall volumetric mass-transfer coefficients (KGa) of CO2 and NH3 with reactions in the RPB at gravity levels of about 70−250g. Experiments involving the simultaneous absorption of CO2 and NH3 into water in an RPB were carried out under different conditions, and it was found that KGa increased with increasing rotation speed, liquid volumetric flow rate, gas volumetric flow rate, and NH3/CO2 molar ratio. It was observed that the model was in good agreement with the experimental data, with deviations within 10% compared to the experimental values. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9001316 [article] Simultaneous absorption of CO2 and NH3 into water in a rotating packed bed [texte imprimé] / Bao-Chang Sun, Auteur ; Xue-Mei Wang, Auteur ; Jian-Ding Chen, Auteur . - 2010 . - pp. 11175–11180. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 24 (Décembre 2009) . - pp. 11175–11180 Mots-clés : Simultaneous--Absorption--CO2--NH3--Rotating--Packed Résumé : This article presents the modeling and experimental investigation of the simultaneous absorption of CO2 and NH3 into water in a rotating packed bed (RPB). A model was established to predict the overall volumetric mass-transfer coefficients (KGa) of CO2 and NH3 with reactions in the RPB at gravity levels of about 70−250g. Experiments involving the simultaneous absorption of CO2 and NH3 into water in an RPB were carried out under different conditions, and it was found that KGa increased with increasing rotation speed, liquid volumetric flow rate, gas volumetric flow rate, and NH3/CO2 molar ratio. It was observed that the model was in good agreement with the experimental data, with deviations within 10% compared to the experimental values. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9001316

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