An Analysis of composition distributions for 2 liquid phase separation solution composed of HI, HSO, I and HO by 3-dimensional visualization

Nakajima, Hayato*; Imai, Yoshiyuki  ; Kubo, Shinji  

Concerning the thermochemical water-splitting Iodine-Sulfur process, understanding of solution compositions on 2 liquid phase separation is essential for making good choices of operating conditions and for accurate estimations of thermal efficiency. The compositions of 4-component system composed of HI, HSO, I and HO were examined experimentally and were analysed by a 3-dimensional visualization technique. A chemical titration method was adapted to determine the mole fractions of the solutions at 293 K and 363 K, and the fraction were represented by scattered points in an equilateral tetrahedron. Two valuable features were found from a visualized shape viewed as an aggregate of the points, which were difficult to find out by 2-dimensional presentations.