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Crystal Sinking Modeling for Designing Iodine Crystallizer in Thermochemical Sulfur-Iodine Hydrogen Production Process
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  • Journal title : Korean Chemical Engineering Research
  • Volume 52, Issue 6,  2014, pp.768-774
  • Publisher : The Korean Institute of Chemical Engineers
  • DOI : 10.9713/kcer.2014.52.6.768
 Title & Authors
Crystal Sinking Modeling for Designing Iodine Crystallizer in Thermochemical Sulfur-Iodine Hydrogen Production Process
Park, Byung Heung; Jeong, Seong-Uk; Kang, Jeong Won;
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SI process is a thermochemical process producing hydrogen by decomposing water while recycling sulfur and iodine. Various technologies have been developed to improve the efficiency on Section III of SI process, where iodine is separated and recycled. EED(electro-electrodialysis) could increase the efficiency of Section III without additional chemical compounds but a substantial amount of from a process stream is loaded on EED. In order to reduce the load, a crystallization technology prior to EED is considered as an removal process. In this work, particle sinking behavior was modeled to secure basic data for designing an crystallizer applied to -saturated solutions. The composition of solution was determined by thermodynamic UVa model and correlation equations and pure properties were used to evaluate the solution properties. A multiphysics computational tool was utilized to calculate particle sinking velocity changes with respect to particle radius and temperature. The terminal velocity of an particle was estimated around 0.5 m/s under considered radius (1.0 to 2.5 mm) and temperature (10 to ) ranges and it was analyzed that the velocity is more dependent on the solution density than the solution viscosity.
Hydrogen Production;SI Process;Crystallizer;Iodine;Terminal Velocity;
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