【摘要】 为发展自主可控的³He^/4He分离技术,研制了一套以GM制冷机为冷源的氦同位素低温吸附分离实验平台,主要部件包括低温控制单元、气体控制单元以及吸附柱单元。选用椰壳活性炭作为吸附剂,通过动态吸附-解吸循环实验探究其对³He^/4He混合气体的分离特性。实验结果表明:在4.2 K的吸附温度下,³He在椰壳活性炭上的动态吸附性能显著优于⁴He;经过3次连续的吸附-解吸循环后,所得解吸气体中³He的丰度由初始值提升至99.93%。更多还原

【Abstract】 To advance the development of autonomous and controllable ³He ^/4He separation technology, an experimental cryogenic adsorption separation platform for helium isotopes was established, utilizing a GM cryocooler as the cold source. The primary components of the system include a cryogenic control unit, a gas control unit, and an adsorption column unit. Coconut shell activated carbon was selected as the adsorbent, and its separation characteristics for ³He ^/4He gas mixtures were investigated through dynamic adsorption-desorption cycle experiments. The experimental results indicate that at an adsorption temperature of 4. 2 K, the dynamic adsorption performance of ³He on coconut shell activated carbon is significantly superior to that of ⁴He. After three consecutive adsorption-desorption cycles, the ³He abundance in the desorbed gas increased from the initial value to 99. 93%.更多还原