Effects of Cross Linking on the Chromatographic Nitrogen Isotope Separation

Xunyue Liu, Xingcheng Ding, Tatsuya Suzuki, Masao Nomura, Yasuhiko Fujii

.

DOI: 10.4236/ajac.2011.22011                

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.

Keywords

Cross Linking; Chromatography; Nitrogen Isotope; Ion Exchange Resin

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Adelstein and F. J. Manning, “Isotopes for Medicine and Life Sciences,” National Academy Press, Washington, D.C., 1995.
[2]	V. D. Borisevich, O. E. Morozov, Yu. P. Zaozerskiy, G. M. Shmelev and Y. D. Shipilov, “On the Enrichment of Low-Abundant Isotopes of Light Chemical Element by Gas Centrifuges,” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 450, No. 2-3, 2000, pp.515-521. doi:10.1016/S0168-9002(00)00266-7
[3]	E. Aoki, T. Kai and Y. Fujii, “Theoretical Analysis of Separating Nitrogen Isotopes by Ion-Exchange,” Proceedings of the 5th Workshop on Separation Phenomena in Liquids and Gases, Iguazu Fals, 22-26 September 1996, p. 197.
[4]	H. C. Urey, J. R. Huffman, H. G. Thode and M. Fox, “Concentration of 15N by Chemical Methods,” Journal of Chemical Physics, Vol. 5, No. 11, 1937, pp. 856-869. doi:10.1063/1.1749954
[5]	W. K. Park and E. D. Michaels, “Separation of Nitrogen Isotopes by Displacement Band Chromatography,” Separation Science and Technology, Vol. 23, No. 12-13, 1988, pp. 1875-1889. doi:10.1080/01496398808075669
[6]	A. V. Kruglov, B. M. Andreev and Y. E. Pojidaev, “Continuous Isotope Separation in Systems with Solid .Ⅱ. Separation of Nitrogen Isotopes with Use of Ion-Exc- hange Resin,” Separation Science and Technology, Vol. 31, No. 4, 1996, pp. 471-490. doi:10.1080/01496399608002211
[7]	M. Ohwaki, Y. Fujii and M. Hasegawa, “Flow-Rate Dependence of the Height Equivalent to a Theoretical Plate in Nitrogen Isotopes Separation by Displacement Chromatography,” Journal of Chromatography A, Vol. 793, No. 2, 1998, pp. 223-230. doi:10.1016/S0021-9673(97)00941-2
[8]	X. Ding, T. Suzuki, M. Nomura, A. Aida and Y. Fujii, “Nitrogen Isotopes Enrichment for Nitride Fuel by Using Hybrid Chemical Exchange Process,” Progress in Nuclear Energy, Vol. 47, No. 1-4, 2005, pp. 420-425. doi:10.1016/j.pnucene.2005.05.042
[9]	X. Ding, T. Kaneshiki, M. Nomura and Y. Fujii, “High Enrichment of 15N Isotope by Ion Exchange for Nitride Fuel Development,” Progress in Nuclear Energy, Vol. 50, No. 2-6, 2008, pp. 504-509. doi:10.1016/j.pnucene.2007.11.070
[10]	X. Ding, M.Nomura, T. Suzuki and Y. Fujii, “High Enrichment of 15N by Chromatographic Chemical Process,” Journal of Chromatography A, Vol. 1201, No. 1, 2008, pp. 65-68. doi:10.1016/j.chroma.2008.06.023
[11]	F. H. Spedding, J. E. Powell and H. J. Svec, “A Laboratory Method for Separating Nitrogen Isotopes by Ion Exchange,” Journal of the American Chemical Society, Vol. 77, No. 23, 1955, pp. 6125-6132. doi:10.1021/ja01628a010
[12]	Y. Fujii, M. Aida, M. Okamoto and T. Oi, “A Theoretical Study of Isotope Separation by Displacement Chromatography,” Separation Science and Technology, Vol. 20, No. 5-6, 1985, pp. 377-392. doi:10.1080/01496398508060688
[13]	M. Aida, Y. Fujii and M.Okmoto, “Chromatographic Enrichment of 10B by Using Weak-Base Anion-Exchange Resin,” Separation Science and Technology, Vol. 21, No. 6-7, 1986, pp. 643-654. doi:10.1080/01496398608056140
[14]	M. Ohwaki, Y. Fujii, K. Morita and K. Takeda, “Nitrogen Isotope Separation Using Porous Microreticular Cation-Exchange Resin,” Separation Science and Technology, Vol. 33, No. 1, 1986, pp. 19-31. doi:10.1080/01496399808544753
[15]	H. Sugiyama, Y. Enokida and I. Yamamoto, “Nitrogen Isotope Separation with Displacement Chromatography Using Cryptand Polymer,” Journal of Nuclear Science and Technology, Vol. 39, No. 4, 2002, pp. 442-446. doi:10.3327/jnst.39.442