Abstract
In this paper, the effect of sodium humate (HA-Na) and seawater on the absorption of SO2 in flue gas was investigated. At the same time, the effects of the initial pH value of seawater and SO2 concentration on seawater desulfurization were also evaluated. The experimental results showed that seawater had the ability to absorb SO2. SO2 dissolved in seawater can react with HCO3– and CO32– plasma to produce CO2, which can prompt the absorption reaction. Besides, the addition of HA-Na can improve the performance of seawater desulfurization and increase the efficiency of seawater desulfurization. It also prolonged the desulfurization time and improved the problem of high usage amount of seawater in practical applications. With the increase of HA-Na addition, the desulfurization efficiency and the efficient desulfurization time of seawater increased. The efficiency of seawater desulfurization decreased with the initial pH value of seawater. The greater the concentration of SO2, the faster the absorption efficiency of SO2 by the solution decreased and the shorter the time for the solution to reach saturation.
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