Abstract
The purpose of the present study is to develop a simple removal method of dioxins⁄furans (dioxins) from a combustion gas at low cost. Removal method of suspended matters in gas (as a cold model) and dioxins in exhaust gas (as a hot model) has been investigated by gas injection into water; the mechanism is that the suspended matters in the gas gather on gas-liquid interface.In the cold model, the removal ratio of fine particles (RP) by injecting gas into water was correlated well by the following equation: RP (%) = 100 X { 1-exp(-0.8•SS•tC )}, where Ss (1⁄cm) designates a specific surface area of bubbles, and tC (s) a residence time of bubbles in water.In the hot model under combustion experiments of poly vinyl chloride, the removal ratio of dioxins (RD) by injecting the exhaust gas into water was estimated as: RD (%)=100X{ 1-exp(-0.8•SS•tC•CD00.07)}, where CD0 (ng⁄cm3(s.t.p.)) designates dioxin’s concentration in the exhaust gas before injection into water.
