Direct dissociation of hydrogen iodide—An alternative to the General Atomic proposal

Detailed kinetic modeling of homogeneous HI decomposition for hydrogen production, part I: Effect of H2O on HI decomposition

“…Thus, direct HI decomposition from HIeH 2 OeI 2 solutions has been investigated to save energy [9,10]. Reactive distillation, which was first introduced by RWTH, used the HI x stream coming from the Bunsen reaction as the feed to the column, the temperature and pressure were set to be 535 K and these conditions [10].…”

Effect of asymmetric variation of operating parameters on EED cell for HI concentration in I–S cycle for hydrogen production

“…In the traditional Bunsen reaction step of the IeS cycle, excess amount of iodine and water is used for facilitating the phase separation between the two acid phases and making the reaction spontaneous, respectively [13,16]. The traditional IeS cycle has lower efficiency compared to the theoretically calculated value primarily due to downstream problems created by these excess of reactants [17,18]. Although highest fraction of total heat required is consumed in the sulfuric acid decomposition section, it is generally believed that there's little room for further optimization of that section [19].…”

“…b) RheinischeWestfä lische Technische Hochschule (RWTH), suggested the feasibility of concentrating HI x solution using reactive distillation under pressurized condition [18]. c) Electro-electrodialysis (EED) using ion exchange membranes [21].…”

Experimental Study for HIx Concentration by Electro-Electrodialysis (EED) Cells in the Water Splitting Sulfur-Iodine Thermochemical Cycle

“…In order to overcome these problems, General Atomics studied an extractive distillation process using phosphoric acid [1][2][3]. Alternatively, a reactive distillation configuration under pressurized conditions was also investigated [4][5][6]. More recently, the use of electro-electrodialysis [7][8][9][10][11][12], pervaporation processes with cation exchange membranes [13,14] and membrane distillation [15] was proposed to concentrate HI aqueous solutions.…”