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Absorption of hydrophobic volatile organic compounds by a rotating packed bed / Chia-Ying Chiang in Industrial & engineering chemistry research, Vol. 51 N° 27 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9441-9445 Titre : Absorption of hydrophobic volatile organic compounds by a rotating packed bed Type de document : texte imprimé Auteurs : Chia-Ying Chiang, Auteur ; Yi-Ying Liu, Auteur ; Yu-Shao Chen, Auteur Année de publication : 2012 Article en page(s) : pp. 9441-9445 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Packed  bed  Volatile  organic  compound Résumé : The high development of industries leads to significant amount of waste hydrophobic volatile organic compounds (VOCs), and these have caused serious environmental concerns. Because of the physical properties of the hydrophobic VOCs, a hydrophobic absorbent is needed in order to make the process more efficient if absorption is considered. However, most of these absorbents have high viscosities which leads to a low mass transfer coefficient. Thus, a cross-flow rotating packed bed (RPB) was evaluated for the feasibility of absorbing the hydrophobic VOCs, xylene, and toluene, by silicon oil, a model hydrophobic absorbent. The result shows that the absorption percentage could be up to 98% within a second contact of liquid and gas. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132281 [article] Absorption of hydrophobic volatile organic compounds by a rotating packed bed [texte imprimé] / Chia-Ying Chiang, Auteur ; Yi-Ying Liu, Auteur ; Yu-Shao Chen, Auteur . - 2012 . - pp. 9441-9445. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9441-9445 Mots-clés : Packed  bed  Volatile  organic  compound Résumé : The high development of industries leads to significant amount of waste hydrophobic volatile organic compounds (VOCs), and these have caused serious environmental concerns. Because of the physical properties of the hydrophobic VOCs, a hydrophobic absorbent is needed in order to make the process more efficient if absorption is considered. However, most of these absorbents have high viscosities which leads to a low mass transfer coefficient. Thus, a cross-flow rotating packed bed (RPB) was evaluated for the feasibility of absorbing the hydrophobic VOCs, xylene, and toluene, by silicon oil, a model hydrophobic absorbent. The result shows that the absorption percentage could be up to 98% within a second contact of liquid and gas. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132281

Micronization of p - aminosalicylic acid particles using high-gravity technique / Yu-Shao Chen in Industrial & engineering chemistry research, Vol. 49 N° 18 (Septembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8832–8840 Titre : Micronization of p - aminosalicylic acid particles using high-gravity technique Type de document : texte imprimé Auteurs : Yu-Shao Chen, Auteur ; Yao-Hsuan Wang, Auteur ; Hwai-Shen Liu, Auteur Année de publication : 2010 Article en page(s) : pp. 8832–8840 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Particles  High  Gravity  Technique Résumé : An antisolvent precipitation process was adopted in this study to prepare micrometer-sized p-aminosalicylic acid (PAS) particles using the high-gravity technique. The effects of operating variables on the particle size were investigated. With an increase in the dispersant concentration and disk diameter or a decrease in the drug (PAS) concentration, the particle size of PAS was reduced. In addition, a circular-tube distributor was more effective than a straight-tube distributor for micronization. On the other hand, the effect of the liquid flow rate in the range between 0.25 and 1 L/min was less significant. The high-pressure homogenization following the high-gravity precipitation would effectively reduce the agglomeration of the particles in the suspension to produce drug particles with a mean size of 1 μm. The enhancement of the dissolution rate was significant for the micronized drug particles. The results indicate that the high-gravity process is a promising approach for micronizing drug particles. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007932 [article] Micronization of p - aminosalicylic acid particles using high-gravity technique [texte imprimé] / Yu-Shao Chen, Auteur ; Yao-Hsuan Wang, Auteur ; Hwai-Shen Liu, Auteur . - 2010 . - pp. 8832–8840. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 18 (Septembre 2010) . - pp. 8832–8840 Mots-clés : Particles  High  Gravity  Technique Résumé : An antisolvent precipitation process was adopted in this study to prepare micrometer-sized p-aminosalicylic acid (PAS) particles using the high-gravity technique. The effects of operating variables on the particle size were investigated. With an increase in the dispersant concentration and disk diameter or a decrease in the drug (PAS) concentration, the particle size of PAS was reduced. In addition, a circular-tube distributor was more effective than a straight-tube distributor for micronization. On the other hand, the effect of the liquid flow rate in the range between 0.25 and 1 L/min was less significant. The high-pressure homogenization following the high-gravity precipitation would effectively reduce the agglomeration of the particles in the suspension to produce drug particles with a mean size of 1 μm. The enhancement of the dissolution rate was significant for the micronized drug particles. The results indicate that the high-gravity process is a promising approach for micronizing drug particles. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1007932