Comments on the paper 'Sulfur-iodine thermochemical cycle: HI decomposition flow sheet analysis'

摘要

Unfortunately there arc several and important mistakes in this article. Figure 7 is incorrect. At 35 ℃, iodine at normal state is solid, consequently you would have liquid-solid equilibrium as well as potential liquid-liquid-solid equilibrium. You can find some solubility limits in the open literature; for example: Powell CF, Campbell IE. The solubility of iodine in concentrated hydriodic acid solutions. J Am Chem Soc 1947;69: 1227-28 (available on internet). The diagram doesn't seem to be in good agreement with these results.rnFigure 8 doesn't correspond to a VLE diagram but to a VLLE "vapour-liquid-liquid equilibrium" diagram. Values for 85% iodine clearly have two liquid phases (and probably value for 65%). Neumann supposed only one liquid phase for regression simplification. His results showed, however, the existence of two liquid phases (bild 11.11 page 50).