Molecular Beam Studies of Environmental Gas-Liquid Reactions: The Removal of Gaseous Sulfur Dioxide by Molten Carbonates

我建议研究有毒气体与熔融盐的碰撞和反应，重点是二氧化硫(SO2)在碱性碳酸盐(CO2-3)熔体中的反应吸收。该项目将首次使用表面敏感的探测器，即分子束散射，研究一种工业和环境重要的化合物在熔融盐表面的降解。我们试图回答以下问题：1)SO2是在熔体的最外层直接与CO2-3反应，还是必须深度溶解才能反应？2)高动能SO2分子能否像锤子一样像锤子一样像弹道一样渗透到液体中？3)熔体中H2O和O2-的存在如何影响不同的反应路径？这些问题涉及从废气中去除二氧化硫的分子途径，它们有助于在基础水平上激发人们对气体-离子液体反应的思考。人们希望这些研究将有助于理解气体在熔体表面的化学和转移过程，特别是那些对有毒气体转化为良性物种非常重要的过程。

I propose to investigate collisions and reactions of toxic gases with molten salts, focusing on the reactive uptake of sulfur dioxide (SO2) into alkali carbonate (CO2-3) melts. This project will be the first study of the degradation of an industrially and environmentally important compound at the surface of molten salts using a surface-sensitive probe, namely molecular beam scattering. We seek to answer the following questions: 1) Does SO2 react with CO2-3 directly within the outermost layers of the melt or must it dissolve deeply in order to react? 2) Can high kinetic energy SO2 molecules act like a hammer and ballistically penetrate into the liquid? 3) How does the presence of H2O and O2- in the melt influence the different reaction pathways? These questions address the molecular pathways by which SO2 is removed from waste streams, and they serve to stimulate thinking about gas-ionic liquid reactions at a basic level. It is hoped that these studies will provide an understanding of the chemistry and transfer processes of gases at the surface of melts, especially those important for the conversion of toxic gases to benign species.