... in addition to curve structure of the packing. 3. Reduction in pressure drop attained by filament-shape ... fill in and out.Gas absorption: SO 2 , SO 3 , NH 3 , CO 2 , H 2 S, HCl, Cl 2 ... , HF, NO X , organic solvents Gas stripping: NH 3 , CO 2 , O 2 , contaminated water by trihalomethane, ... SO 4 /Ammonium sulfate industry: SO 2 , SO 3 , NH 3 , Absorber, Scrubber Soda industry: Chlorine drying tower Iron ...