低温循环色谱法分离H_2/HD

H_2/HD Separation by the Cryogenic Cycling Chromatography

低温循环色谱法(CCC)是一种有效的氢同位素分离方式。在升级改造后的低温色谱分离装置上开展了H2/HD体系的分离研究。结果表明:原始氘丰度为1.4×10-4的高纯氢经过CCC 4个流程后,氘丰度达到1.173×10-3;为获得最佳色谱柱柱效,CCC的进样量控制在组分峰的容量因子下降10%时较为合适;CCC的双柱间可互相充当解吸柱与接收柱的角色,在柱结构与程序升温条件相同的前提下,双柱间分离效果的差异可能是进样点的选择和进样压力的不同造成的,与进样时间无关。

The cryogenic cycling chromatography（CCC） is an effective way for hydrogen isotopes separation. The separation study of H2/HD system has been performed on the cryogenic chromatographic device after reform and upgrade. It was concluded that the deuterium abundance of pure hydrogen can reach 1. 173 ×10^- 3 by four flows from the original abundance 1.4×10^-5. In order to acquire the best chromatographic column efficiency, the injection volume of CCC must be regulated with capacity factor of ingredient peak decreasing 10%. Dual columns of CCC can serve as the desorption column and receipt column each other. Under same conditions of columns structure and temperature programmed, the discrep ancy of separation result for dual columns may be caused by the choice of the sample injection point and different sample injection pressures, but not by the sample injection time.