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U.S. Department of Energy
Office of Scientific and Technical Information

Status report on sulfur iodine thermochemical water-splitting cycle

Conference ·
OSTI ID:5536911
Major process improvements which had been identified in an earlier phase of this program were investigated and their feasibility demonstrated. The engineering process flowsheet was revised to incorporate the newest process improvements. It is now being used for an estimate of hydrogen production cost from the General Atomic Company (GAC) cycle. An energy storage cycle for a solar adaptation of the sulfur-iodine cycle has been identified and is being evaluated along with features particularly concerning the availability and level of insolation and how it affects engineering design of the chemical plant. Efforts are also underway with Lawrence Livermore National Laboratory (LLNL) to design the sulfur-iodine cycle around the Tandem Mirror Fusion Reactor. Potential systems for HI purification are being investigated which could eliminate the need for the present phosphoric acid treatment completely and could result in significant savings in capital cost for this part of the process. Potential catalysts for the liquid HI decomposition step were evaluated. Noble metals appear to have highest activity; however, attrition of the catalyst occurs.
Research Organization:
General Atomic Co., San Diego, CA (USA)
DOE Contract Number:
AC01-80CS80004; AC02-80ET26225
OSTI ID:
5536911
Report Number(s):
GA-A-16610; CONF-8109102-2; ON: DE82007164
Country of Publication:
United States
Language:
English