Aiming to efficiently enrich heavier hydrogen isotope on a large scale, a process named Dual-Column Vacuum Pressure and Temperature Swing Adsorption (DC-VPTSA) was proposed and experimentally tested. The process has the following characteristics: 1) two identical separation columns work together; 2) Pressure Swing Adsorption (PSA) process and Temperature Swing Adsorption (TSA) process are coupled; 3) the gas always keeps one-way flow in different separation columns; 4) the process is always carried out under low temperature or low pressure condition. To verify the feasibility of the process, an experimental device was set up and the hydrogen isotopes enrichment performance was tested. The experimental results show that the process can steadily and efficiently enrich D from H. For a H-HD-D mixture with 3.63 at.% of D abundance, the enrichment factor reaches about 19.7 and the recovery ratio is better than 99%. The treatment ability reaches a level of 560 SL/day under the condition of the individual column capacity of 71.5 SL. Compared with other processes, the presented process is superior in treatment ability, enrichment factor and recovery ratio.

中文翻译：

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双柱变压变温吸附富集氢同位素工艺实验验证

为了大规模有效地富集较重的氢同位素，提出了一种名为双柱真空变压变温吸附（DC-VPTSA）的工艺并进行了实验测试。该工艺具有以下特点：1）两个相同的分离塔协同工作；2）变压吸附（PSA）工艺与变温吸附（TSA）工艺耦合；3）气体在不同的分离塔中始终保持单向流动；4）该过程始终在低温或低压条件下进行。为了验证该工艺的可行性，搭建了实验装置，并对氢同位素富集性能进行了测试。实验结果表明，该工艺能够稳定、高效地从H中富集D。对于D丰度为3.63 at.%的H-HD-D混合物，富集因子达到约19.7，回收率优于99%。在单柱容量为71.5SL的情况下，处理能力达到560SL/天的水平。与其他工艺相比，该工艺在处理能力、富集倍数和回收率方面均具有优越性。