Absorption of hydrophobic VOC in an organic phase

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

1 ISCR - Institut des Sciences Chimiques de Rennes
2 Faculté polytechnique de Mons
3 GEPEA - Laboratoire de génie des procédés - environnement - agroalimentaire
4 Mines Nantes - Mines Nantes

toluene or dimethyldisulfide (DMDS)​. A preliminary bibliog. review allowed to select a silicone oil (polydimethylsiloxane, PDMS) that seems efficient for VOC absorption, as well as for biol. regeneration. The aim of this work was to evaluate the performances of the 1st step of the process, namely the absorption step. The partition coeffs. of the targeted VOC in PDMS were quantified. The expts. permitted to demonstrate that the VOC have more affinity for PDMS than for water (partition coeffs. 267 and 36 times higher for toluene and DMDS, resp.)​. Nevertheless, the measured diffusion coeffs. of the VOC in PDMS are lower than those measured in water (∼30 times lower)​, which can lead to a lower efficiency of the process. Expts. were then carried out in a packed column pilot plant. As expected, efficiency increased with the liq. flow rate. In optimized operating conditions, toluene and DMDS are totally absorbed in PDMS for inlet gaseous concns. of ∼68 and 84 ppm, resp.

Domaines: Chimie inorganique

Guillaume Darracq, Annabelle Couvert, Catherine Couriol, Abdeltif Amrane, Pierre Le Cloirec, et al.. Absorption of hydrophobic VOC in an organic phase. Récents Progrès en Génie des Procédés, 2014, 106. ⟨hal-01011973⟩