Abstract
The effects of cross linking with porous cation exchange resin were studied for nitrogen isotope separation. The displacement chromatography was conducted by the resin with cross linking rang from 20% to 40%. A sharp adsorbed ammonium band was maintained for each operation. Enriched 15N isotopes with 0.93% were obtained by 20% cross linking resin and two meters chromatographic operation which started from the natural abundance of ammonium molecule. The effect of cross linking percentage on the height equivalent to a theoretical plate (HETP) was evaluated in the present work and the HETP value is proportional to the cross linking percentage. HETP value of 0.036 cm was obtained at the present system by using 20% cross linking resin.
Highlights
Enriched nitrogen isotope 15N has been used in various scientific and technological fields as a non-radioactive tracer [1]
As a continue work of our previous work, we studied nitrogen isotope separation by cation exchange resin with different percentage of cross linking to evalua
It is necessary to maintain the sharp ammonium band in order to obtain highly enriched 15N; the results clearly indicate that the present chromatographic operation conditions were suitable for nitrogen isotope separation
Summary
Enriched nitrogen isotope 15N has been used in various scientific and technological fields as a non-radioactive tracer [1]. Many studies have been focused on nitrogen isotope separation [5,6,7,8,9,10] and chemical exchange method in isotope separation had been proved to be the most promising method for light element isotope separation since firstly performed by Spedding et al [11]. In this process, strong acidic cation exchange resin was packed in colums and ammonium ions were adsorbed in resin phase.
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