Investigation and Modeling of the Effect of Reflux Ratio on the Separation Efficiency of Hydrogen’s Stable Isotopes in Batch Packed Tower

Document Type : Research paper

Author

Arak University

Abstract

Among the various methods for the separation of stable hydrogen isotopes, water distillation, despite the low separation factor, has many inherent advantages, including the absence of toxic and corrosive components of hydrogen sulfide gas, no need to use electrolysis to convert hydrogen gas to water and no need to catalyst. This research used 11% heavy water and batch distillation in packed tower to produce heavy water. The packing used was polyamide Rashig rings and semi Dixon rings were made of stainless steel. It was tested at a bed height of 2 m and reboiler flow of 5 to 44 lit/hr and Height Equivalent to a Theoretical Plate (HETP) was obtained. Although this height was lower for polyamide packing, it was rejected due to increasing the total organic carbon (TOC) of water. Next, for the Dixon-like packing in the linear part of the diagram, which is optimal for designing operational units, a mathematical model was fitted to the test data, that can be used for prediction among the test interval, with very good aquracy.

Keywords

References

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Journal of Separation Science and Engineering
Volume 14, Issue 2
April 2023
Pages 25-38

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