High Efficiency Generation of Hydrogen Fuels Using Nuclear Power Final Rechnical Report for the Period August 1, 1999 Through September 30, 2002 Rev. 1

Energy requirement of HI separation from HI–I2–H2O mixture using electro-electrodialysis and distillation

“…As a result, the minimum heat demand of the entire HI x section became 3.07 Â 10 5 Â 2 þ 1.26 Â 10 4 ¼ 6.27 Â 10 5 J/mol-H 2 for the Nafionmembrane case, and 3.84 Â 10 4 Â 2 þ 1.26 Â 10 4 ¼ 8.94 Â 10 4 J/ mol-H 2 for the ideal-membrane case. Table 5 summarizes and compares the input heat duty of the HI x section with different types of distillations [16,23,24]. The input heat duty for 1 mol hydrogen production in the Nafion-membrane case of this study is larger than those of the flow sheets employing extractive or reactive distillation.…”

“…2 shows the HI separation subsection flow sheet utilized in the present study. The composition of the feed stream from Bunsen section was assumed to be HI/I 2 /H 2 O ¼ 0.10/0.39/0.51 (molar ratio) which was taken from GA's study [16]. The HI molality of this solution was 10.9 mol/kg-H 2 O.…”

Corrosive Resistant Diamond Coatings for the Acid Based Thermo-Chemical Hydrogen Cycles

“…Schwartz and et el reported the decomposition products are produced over a 600°C to 926 °C temperature range , General Atomics concluded sulfur dioxide production efficiency increased at lower process pressures 7 . However, based on overall cycle thermal efficiency, General Atomics concluded the decomposer should operate 1.85 Bar in there conceptual plant design.…”

“…A closed cycle was chosen for the simulator flow path design to match the proposed sulfur iodide and hybrid sulfur cycles 9 . Water was the only main feedstock into these cycles.…”

Applied thermodynamics in chemical technology: current practice and future challenges

“…The (sulfur-iodine) SI cycle is a primary target of international interest for the centralized production of hydrogen by using a heat source such as solar or nuclear. Of the 100+ thermochemical hydrogen cycles that have been proposed, the SI cycle, originated by general atomics (GA), is expected to become a major source of centralized hydrogen production from nuclear power [32] or solar energy [33]. However, the SI cycle and its many proposed variations [34,35] all involve complex, highly nonideal phase behavior and reactions, and none have ever been operated at design temperatures and pressures.…”