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发展了一种以高分子羧甲基纤维素钠(Carboxymethyl cellulose,CMC)、NaF和H2O为原料,通过成形和烧结等程序制取多孔型NaF吸附剂颗粒的新方法。分析和表征结果指出,吸附剂比表面积为0.3–0.4m2·g-1,孔隙率为40%–45%,颗粒强度为60–80N。室温下,吸附剂对MoF6的平衡吸附量约37.8 mg MoF6/1g NaF。能谱(Energy Dispersive Spectrometry,EDS)分析指出,MoF6能够通过NaF颗粒的孔隙扩散到吸附剂的内部。预计该吸附剂可以用于氟化挥发中UF6的进一步纯化研究。
A new method for preparing porous NaF adsorbent particles by the procedures of forming and sintering has been developed by using carboxymethyl cellulose (CMC), NaF and H2O as raw materials. The results of analysis and characterization indicate that the specific surface area of the adsorbent is 0.3-0.4m2 · g-1, the porosity is 40% -45% and the particle strength is 60-80N. At room temperature, the equilibrium adsorption capacity of adsorbent to MoF6 is about 37.8 mg MoF6 / 1g NaF. Energy Dispersive Spectrometry (EDS) analysis indicates that MoF6 diffuses into the interior of the adsorbent through the pores of the NaF particles. The adsorbent is expected to be used for further purification of fluorinated volatiles in UF6.