Discussions of Mass Transfer Behaviors Between VOCs and TEG Solutions by Surface Tension and Equilibrium Process

Abstract

In order to discuss mass transfer behaviors between volatile organic compound (VOC) and triethylene glycol (TEG) solutions affected by surface tension and equilibrium process. The packed-bed absorption system and the equilibrium system were designed. TEG solution was chosen as the working solution in this study, and the tested VOCs included methanol, methyl ketone (MEK), toluene, and ethyl ether. Experimental results showed that the order of absorption performances was methanol, MEK, toluene, and ethyl ether in the initial concentrations of VOCs Downloaded by [Temple University Libraries] at 05A c c e p t e d M a n u s c r i p t 2 were 24.05 % mol and 14.50 % mol. This result agreed with the prediction by the equilibrium concentration.

Volatile organic compounds absorption in packed column: theoretical assessment of water, DEHA and PDMS 50 as absorbents

“…For hydrophobic neutral compounds, due to their poor affinity for water, absorption in aqueous solution is ineffective and A c c e p t e d m a n u s c r i p t 5 organic solvents must be considered as an alternative [3]. Since the 2000's, a new generation of heavy organic solvent, such as phthalates, polydimethylsiloxane (PDMS, a silicone oil), Bis(2-ethylhexyl) adipate (DEHA) or ionic liquids drew a particular attention, especially for their good affinity with many VOC and low volatility, among other interesting characteristics [4][5][6][7][8][9][10][11]. However, their high viscosity can may hinder the mass-transfer in the liquid phase and increase the energy footprint through a higher pressure drop.…”