二氧化硫在脱钙后海水体系中的溶解平衡

发布时间：2018-08-01 12:04

【摘要】：CO2脱钙后海水与标准海水相比,具有更少的Ca2+和更多的HCO3-,理论上HCO3-可与SO2溶于水后产生的亚硫酸氢根反应,促进SO2的溶解。为此本文以N2为惰性载气,研究了1atm下,温度变化范围为34.0~63.9℃,SO2在标准海水、Na HCO3含量增多的海水以及钙离子减少的海水中的溶解性能,以期实现海水CO2脱钙与烟道气脱硫的耦合。结果表明SO2在标准海水中的溶解度随着温度的升高显著降低,且SO2溶解度的数值与温度呈近似线性关系;海水中HCO3-含量的增加会提高SO2在此水体系中的溶解度;而海水中钙离子的减少对SO2在此水体系中的溶解性能并无显著影响。因此与标准海水体系相比,CO2脱钙后海水体系对SO2具有更好的溶解性能,为利用CO2脱钙后海水进行烟气脱硫,从而实现海水脱钙与烟气脱硫的耦合提供了理论支持及基础数据。
[Abstract]:Compared with standard seawater, CO2 decalcified seawater has less Ca2 and more HCO _ 3-. theoretically, HCO _ 3- can react with hydrogen sulfite radical produced by SO2 solution in water and promote the dissolution of SO2. In this paper, using N2 as inert carrier gas, the solubility of so _ 2 in seawater with the increase of Na _ (HCO3) content in standard seawater and the decrease of Ca ~ (2 +) in seawater was studied under 1atm. In order to realize the coupling of CO2 decalcification and flue gas desulfurization. The results show that the solubility of SO2 in standard seawater decreases significantly with the increase of temperature, and the value of SO2 solubility is approximately linear with the temperature, and the increase of HCO 3-content in seawater will increase the solubility of SO2 in this water system. However, the decrease of Ca ~ (2 +) in seawater had no significant effect on the solubility of SO2 in this water system. Compared with the standard seawater system, the CO2 decalcified seawater system has better solubility to SO2, which provides theoretical support and basic data for flue gas desulfurization by using CO2 decalcified seawater and realizing the coupling of seawater decalcification and flue gas desulfurization.
【作者单位】：河北工业大学海洋科学与工程学院;
【基金】：国家“十二五”科技支撑计划(2015BAB09B00) 国家自然科学基金(21306037) 天津市自然科学基金(13JCQNJC05600;14JCYBJC20700) 河北省高层次人才资助项目(C2013003041)
【分类号】：P746;X701.3

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