Progress of Cryogenics and Isotopes Separation

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The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.
SIMULTANEOUS SEPARATION OF 15N AND 14N BY ISOTOPIC EXCHANGE IN NITROX SYSTEM AT PRESSURE Print

SIMULTANEOUS SEPARATION OF 15N AND 14N BY ISOTOPIC EXCHANGE IN NITROX SYSTEM AT PRESSURE


Damian Axente*, Ancuţa Balla, Cristina Marcu, Ştefan Gergely


 

National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Str. 400293 Cluj-Napoca, Romania

ABSTRACT

A new experimental study on simultaneous separation of 15N and 14N by 15N/14N exchange in Nitrox system under pressure is presented. The influence of the 10M HNO3 flow rate and of the pressure on the isotopic separation was measured on a packed column equipped with product and waste refluxer. The experimental data show that the separation of 15N and 14N is improved by column operation at pressure. By using the additional column section in the top of waste refluxer all nitrogen oxides were converted into nitric acid and NOx losses, in the top of isotopic separation plant, were not more observed. The pressure in the 0.6- 1.6 atm range of the sulfur dioxide, feeding the product refluxer, can be utilized providing similar results for 15N, 14N separation for 3.14 10M HNO3 mL/cm2·min flow rate in the packed separation column.

Keywords: 15N, 14N separation, isotopic exchange, Nitrox system, pressure, packed separation column.

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*Corresponding authors: Damian Axente, phone: 0264 584037; fax: 0264 420042; E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it