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

Eric Dumont (1) , Guillaume Darracq (2, 3) , Annabelle Couvert (2) , Catherine Couriol (2) , Abdeltif Amrane (2) , Diane Thomas (4) , Yves Andres (1, 5) , Pierre Le Cloirec (2)

1 GEPEA - Laboratoire de génie des procédés - environnement - agroalimentaire
2 ISCR - Institut des Sciences Chimiques de Rennes
3 UEB - Université européenne de Bretagne - European University of Brittany
4 Faculté polytechnique de Mons
5 Mines Nantes - Mines Nantes

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 (f = 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 KLa which can be related to the change in the partition coefficient (Hmix). They confirm the results obtained for styrene absorption using another measurement technique [15]. The interpretation of the results using dimensionless ratios KLa(f)/KLa(f=0%) and KLa(f)/KLa(f=100%) versus f also confirms the importance of the partition coefficient ratio mR = Hwater/Hoil in the KLa change. Moreover, the results obtained for toluene absorption in "air/water/silicone oil" systems (f = 10, 15 and 20%) suggest that the mass transfer pathway is in the order gas→water→oil for these operating conditions.

Mots clés: Absorption; Mass transfer; Hydrophobic VOC; TPPB; Silicone oil

Domaines: Ingénierie de l'environnement

Eric Dumont, Guillaume Darracq, Annabelle Couvert, Catherine Couriol, Abdeltif Amrane, et al.. Volumetric mass transfer coefficients characterising VOC absorption in water/silicone oil mixtures. Chemical Engineering Journal, 2013, 221, pp.308-314. ⟨10.1016/j.cej.2013.01.102⟩. ⟨hal-00877621⟩