Vapor-liquid phase behavior of the iodine-sulfur water-splitting process : LDRD final report for FY03.

Bradshaw, Robert W. ; Larson, Richard S. ; Lutz, Andrew E.

Sandia National Laboratories

关键词: Hydrogen Production;    Thermal Analysis.;    Iodine;    08 Hydrogen;    Water-Composition.;   

DOI  :  10.2172/919168
RP-ID  :  SAND2004-8014
RP-ID  :  AC04-94AL85000
RP-ID  :  919168

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report summarizes the results of a one-year LDRD project that was undertaken to better understand the equilibrium behavior of the iodine-water-hydriodic acid system at elevated temperature and pressure. We attempted to extend the phase equilibrium database for this system in order to facilitate development of the iodine-sulfur water-splitting process to produce hydrogen to a commercial scale. The iodine-sulfur cycle for thermochemical splitting of water is recognized as the most efficient such process and is particularly well suited to coupling to a high-temperature source of process heat. This study intended to combine experimental measurements of vapor-liquid-liquid equilibrium and equation-of-state modeling of equilibrium solutions using Sandia's Chernkin software. Vapor-liquid equilibrium experiments were conducted to a limited extent. The Liquid Chernkin software that was developed as part of an earlier LDRD project was enhanced and applied to model the non-ideal behavior of the liquid phases.