Volumetric mass transfer coefficients characterising VOC absorption in water/silicone oil mixtures

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• 作者：E. Dumont^a ; ^{eric.dumont@mines-nantes.fr} ; G. Darracq^b ; ^c ; A. Couvert^b ; ^c ; C. Couriol^b ; ^c ; A. Amrane^b ; ^c ; D. Thomas^d ; Y. Andrè ; s^a ; P. Le Cloirec^b ; ^c
• 关键词：Absorption ; Mass transfer ; Hydrophobic VOC ; TPPB ; Silicone oil
• 刊名：Chemical Engineering Journal
• 出版年：2013
• 出版时间：1 April, 2013
• 年：2013
• 卷：221
• 期：Complete
• 页码：308-314
• 全文大小：683 K

文摘

The physical absorption of three Volatile Organic Compounds (dimethyldisulphide (DMDS), dimethylsulphide (DMS) and toluene) in ¡°water/silicone oil¡± systems at a constant flow rate for mixtures of different compositions (? = 0 % , 5 % , 10 % , 15 % , 20 % , and 100 % ) was investigated using a dynamic absorption method. The results indicate that silicone oil addition leads to a dramatic decrease in K_La which can be related to the change in the partition coefficient (H_mix). They confirm the results obtained for styrene absorption using another measurement technique . The interpretation of the results using dimensionless ratios K_La_(?)/K_La_{(?=0 % )} and K_La_(?)/K_La_{(?=100 % )} versus ? also confirms the importance of the partition coefficient ratio m_R = H_water/H_oil in the K_La change. Moreover, the results obtained for toluene absorption in ¡°air/water/silicone oil¡± systems (? = 10 % , 15 % , and 20 % ) suggest that the mass transfer pathway is in the order gas ¡ú water ¡ú oil for these operating conditions.