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Hydrodynamic characters of co-current operation for SO_2 absorption in a laboratory packed column
He Jie,,Tianjin University,Jia Man-Ling,Tan Chang-Bin 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.11
A co-current operation for SO_2 absorption by water was performed in a laboratory-scale packed column. The effects of L/V (liquid-gas ratio) and F (gas phase loading factor) on the SO_2 absorptivity were both investigated. The absorptivity for co-current increased with the increase of L/V and the percentage of absorptivity increase at higher L/V is larger. At lower F, in regular packing there is fluctuation of absorptivity with F increased, but in random packing there is not. With the increase of F, the absorption curve slowed down. It is proposed that in order to obtain a steady desulfurization efficiency, F factor in both kinds of packings should be higher than 4 kg^(0.5)/m^(0.5)s. For absorptivity, which could be reached by both co-current and counter-current, it is suggested that co-current is better because of the higher gas velocity.